i

. . . I ,' : ,w........ ...,~..~ .

' it i.: >'o" Drake SW-2 Receiver

Uniden PRO-64 Scanner" . . ~s, ,

~Reaction /~""Tune

AnotherReceiver .

Ano ther ra dio to tune, anot her reason to purchase the Sco ut,Until now the AOR A R8000/2700 were the only hand held scanners 10 take

advantage of the ScoIII ".\- Parented Reaction Tune function. The Scout ca n nowtune the new lCOM IC-R 10 ha nd he ld sca nner (shown be low ). Connection is

eas y: No modificat ions required - No custom cab les (Q buy - Ju st plug andplay.

Com put er i'Ul lnc fudcd Scanner hobbyists and communication professionals benefit from theScout 's unique functions. Wheth er you' re searc hing for new frequencies in your neighbor hood. ortesting for interfe ren ce . the Scout is the ultimate co mmunications tool.

Scout with ICOM IC-R10Mono Cable required (shown)

You won' t miss a thing with Reaction Tune. The Scout's CI-V co mpat-ible output allow, it to interface to the AOR AR 2700/AR 8000. ICOMR7001l. R7 100 . R8500 . R90(X) and now the new IC-RI O (shown oposite j.The Scout captures the frequency. then send s the serial data to the receiverand tunes the scanner to the frequency for instant monito ring in less than onesecond . Recorded freq uencies cun be downloaded to a PC using theoptional O pto Linx universal interface ,.

SPECIFICATIONS~ IOMHz- 1.4GHz frequency coverage~ Stores

r;JnitpringL---HmeS'M

CONTENTS

/

0'" .'"90' " " ....'", ,/ "

A slingshot, fish ing reel. and a tree are a ll theingredients you need to erec t a great antenna. whether atho me or in the fie ld.

By Chuck DeLongfield

... DX camp. that is. wh ere the reception ofdista nt signals tak es preced ence over eating andsleeping . Gebhardt gives examples of camps tha tvary from one to dozens or peopl e. and antennasstrung as Vs , Ts , Ls, squares. d iamo nds. andtriang les. What willyolilTeceiver say when asked."What did yo u do this summe r...! "

By Patrick Griffith

Send Your Receiver to Camp 12By Philip Gebhardt

DMAT's Mobile Medical Teams 21

The Under $30 Antenna Launch 20~J

C5

August 1997VoI. 1 6,~o. 8

Radio Netherlands Hitsthe Big ff5-0"

Cm'a Storv

- ---I" ,uuua....: :: :;.- ....

- . - _ I

By Jeffrey Poulin

Fifty years ago, in the aftermathof \Vorid War II, a radio servicewith a distinctly Dutch voice cameon the air. The station recognizedthat a country half the size nf SouthCarolina can 't demand the wo rld' sattention, so Radio Nethe rlands setabout winning the loyalty of its lis-tellers by interesting and usefu l pro-gram min g, the best in reproductiontechniques,anda readinesstochangewith the times.

Th e formula has wor ked well forfifty years for this "European sta-tion with the Dutch acce nt." Thesto ry starts on page 8.

When a natural or man -made disa ster req uires medical ca re and evacu-atio n. a number of federal agencies arc equipped to respond. O ne suchorganizat ion is the Disaster Medica l Assistance Team. Here are so memo nito ring tips from CO-2' s communication s o ffice r.

UI'!Jr"elillg tlrE' ()CE'''" 1I(11'1'E'r 22By AI Ci/las

Ma ny readers will remember the Knight kits. especially the OceanHopper shortwave receiver. If yo u never had " chance to make one. yo u eanbu ild yo ur own without the kit. Th is slightly revised ci rcuit red uce s the dangerof ele ctrica l shock that wa s inhere nt in the ori ginal design.

Reviews:Magne tests the SW2 shortwave recei ver. and

says Drake ha s nearly achei ved the goa l of produ c-ing a worthy performer for less than S500 (page92). Th e Radio Shack PRO-64 mobile scanne rcomes under Parn ass ' eye . He pronounces it a major improvem ent over thePRO -62 (page 94 ). Catalano checks out a co mmunica tion mode decodingprogram . Radioraft, that wo rks very we ll - and the lite version is free' (p. S5)

Postmo ster :Sen d a d d re ss cha nges to Monitoring Times ,P.O . Bo x 98, Bras stown , NC 28902 -0098 .

Subscription Ra tes: $23.95 in US; $36.5 0Canada ; and 55 5.45 foreign elsewhere, usfun d s. La be l ind ica te s la st issue o f subscrip-tion. Seepage J03 for subscrip6on infonnation.

Copyright 1997. Periodicals postage paida t Brasstown , NC, and addi tional moil ingoffices . Short excerpts may be reprin tedwi th appr op ria te credi t . Co mplete articlesma y not be repro du ced wi thou t permission.

Plane Talk """" """"" "" "" "" ...." ..",,, 76Separation Anxiety

Federa l File " """ .." " 78Brave New Wo rldof Scanning

Satellite TV """..""".........." " ".." " ....80The Big Dish Advantage

Experimenters Workshop " .... ,," ...... ,.. 82WiNRADiO's Speclrum Scope

Computers & Radio " ...... .... " """"", .. 84Radiaroft Decoding Program

Programming Sporlight""""""'"'' ''_'' ''' 86Culture and the Ans

Tracking the Trunks ." " "" .."."" "" ,.." .., 88Getting on Track

Whors New "".."""".." "".." ..",,, ,,,..,, 89Magne Tests """ " " " " 92

Drake SW-2Sca nning Equipment ..""" 94

Radio Shack PRO-64Antenna Topics .." "" ""..,.." 96

Using a Counterpoise to Aim HighSpecial Events/Club Circuit "" 98Ask Bob " """ " , 100

MW BCOverload CureStockExchange " " " .." .." 102Closing Comments " 104

What's the big secret?

DEPARTMENTS

Letters "" """." " """"". ". " .."""" " ,.""" 4Communications 6PCS Front Line " "" ."""""__ " """"_"" ,,,, 28

Pick a Pock of PackelsScanning Report ,,__ """" ' '' '' '' '' '' ' '''' '' '''' 30

The TrunkTracker DebutsU~lityWorld " " " " __ " " " " " " ,__ " " """ ,, 34

HFMaritime Station NewsGlobal Forum """__ ,,.. 38

SW Mirrors Ihe WorldQSLReport" " " " " " " " " .. 42English Lang SW Guide " " ", .."""" ,43Propaga tion Conditions " """..........63

Near Vertical Incidence SkywaveBeginnerls Corner 64

Are you suffering from LMS?Below 500 kHz " 66

Lawfer ZWIAmerican Bandscan ......" ..,.......""" " 68

Domestic OX and the In ~ernetOuter Limits " ", 70

Pirate Loggings Explosion!On the Ham Bands ........" .......... """". 72

World of Ham Radio CDDeMaw's Workbench ...." .......... "" ,.., 74

Homebrewed Breadboards

MONITORING TIMESIISS N: 0889-5341) ispublished monthly byG ro ve Enterp r ises, lnc. ,Brasstown , No rthCaro lina, USA.

fiff-I

Editorial e-mail:Subscriptions:

Ad dr ess: PO. Box 98, 7540Highway 64 West,Brcsstown, NC 28902 0098

Telephone: 1704)837-9200Fox: 1704)837-2216 124 hours)Internet Addr ess: www.grove .nel {web) or

mt@grove.nef le-moi l)mteditor@grove.neforder@grove.net

Example:Tosubscribe 10 occ rs, send E-mail to mojordomo@grave.net,with "subscribe cco rs" in body(no signature). Add "digesf tosubscribe to digest (0 blockof100 messages).

Disclaime r:Whi le Monitoring Times mckes on ellort toensure the information it publ ishe s is accu -ra te , it conno t be he ld liab le for the con tents .The re a d e r assumes any risk fo r performingmod ifica tio n o r cons truc tion p ro jects pub-lished in Monitoring Times . Opinion orco ncl us ion s expressed arc not necessa rilythe view of Monito ring Times or GroveEnterp r ise s . Unsoli c ited man us cripts area cce p ted . SAS E if ma te r ia l is to be re turn ed .

OwnersBob a nd Judy Grove

Publ is he rBob Grove, WA4PYQ

bgrove@grove.net

Managing EditorRachel Baughn, KE40PD

mteditor@grove.net

Assista n t EditorLorry Von Horn, N5FPW

Art DirectorJohn Bailey

Design As s ist a ntBelinda McDonald

Adverti sing Svcs .Beth Leinbach

170413B9-4007be th@grov e.net

Business Ma nag e rKelly Davis, KE4TAM

kelly@grove_net

E 5 Correspondence 10columnists may bemoiledc/o I'JIoniloringDITORIAL TAFF Times; onyrequest fora reply should includeon SASE.Freq uency Manager Gay le Vo n Horn . gayle@grove .netFreq uency Moni tors David Datko, Mark J. FineProgram Manager Jim Frimmel ..... ........... . frimme l@stortnetAmerican Bondscan " Doug Smith , W 9WI 72 7 7 7. 3 1A3@co mpu serve .co mAnte nna Topics W . Clem Small , KR6A cle msmclta biuerroot.netBegin ner' s Corner T.1, Arey . WB2GHA . . tjarey@mosquito .comBelow 500 kHz Kevin Corey , WB20MY KCarey@mdsroc. comCommunications. . Lar ry Miller NSCAN@oo l.comComputers and Radio Jo hn Cata lano . . j_co ta la no@co nkne l.co m

gfg'i:~i~i;~~~.~.~.~~~ . :::::.:::: ~~b~~aen~~.~., ..~.~ .F .~ _ reva ns@a stral .ma g ic. caExper imenter 's w kshp Bill Cheek bcheek@sa n .rr.camFedera l File John Fulford , WAAVPY john f@emi.ne tK.LS. Radio . . Richard Arland , K7SZ .. . k7 sz@juna .netMegne Tests " ,.. .. La wre nce MagneOn the Ha m Bonds Ike Kersc hne r, N3 1K

?C~e~ r~~ i t~ ~ e ::::::::::: :::::::::::g~~ r~:e~~I~~ ;~.:. . ..... :: ' ::::::::::: ~:~@~e~;~~:~~':nccl ink.c o mPlene Talk . . " Jean Bak e r, KI N9D DPror o ga tion " .. Ja cque s d' Avignon mo nitor @ra c.caO S Corner " Gayle Va n Horn goylc@g rove.netSa tell ite TV. . . " .. Ken Reitz, KS

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ll w Bearcat 9000XI.T is sll!wrn fur intercepting communicalionstrammissi\lIls wilhfeatures like TlITooSt'archT"to searchVHF challnr ls al 500 s le p~ fiN S\'cund. 11lis ba.'eand mobileS(;lnner is alsoidc';llfor intellil:l'lIce pwfessionah because ithasa sell'cl3ble allC'llllatur 10 twlp eliminall.' annoyingintermodub tionfromadian'nl frl'ljllrncil's in hi/(hlypoplllatrdareas and .

LET T E R S

OX Camping

(Cow inl/('d Of/ page JOl )

Tweaking the Crystal Set

Tech Plus six week s later. rill stilllearning about all the 'new ' stuff inamateur rad io Ihat' s d ifferent fromlily childhood mem ory of it - somany new things like packet. QR P.tiny VHF tran sceivers . e tc. BUI whatrea lly ca ught my eye was what youwrote about 'a ham transmitter for 55in 1()6()s dollars' th.u you built forunder S::! ()in I99()s do llars. I'd love tosec wh.u that looks like - and maybebuild O IlC . .Onc of my favori te pic-lures in the ARRL iVOIl' )lOII ' /,(' Tulk-illg hook is of a C\V trans mitter buillon a tun a fivh ca n.I"

Alert reader Howard. WA2A FD.noticed that there appeared to be two wind-ings 0 11 the Quak er Oats box crystal set pic-turcd 0 11 page XC) of the May '97 M1'. l ie iscorrect. Author Ken Reitz elaborates.

"There arc two tuning coi ls on the oatmea lh11.\, The mod ification comes from old-timecrystal set G uru [ Imer Osterhoudt (now asilen t kl'y) who was issued the ham call 6;\\vin Il) II) and who started Modern Radio Labo -rator ies ill 1932 and ran it until his death inI9X7 a t the age of X7. In a flyer he prin ted .fol lo win g t he public ation o f the 1970klt'cl/(lIIi.\ Illustrated art icle referred to in Illypiece . he added the extra co il saying, ...al-though the or iginals didn ' t use the primarywinding [top coi l ]...this is esse ntial if youwant good se lectivity in separating suu ions.:

" It' s j ust IIHll'C oft he mystery of the crystalset . It' s allla;;ing what you can do with solittle. Rep rints of Osterho udt' < voluminous\\ ( III withcrystal sets were made available byPaul Nelson who resurrected MRL. How-eve r. reports in the Crystal St't Smietv News-loner IP.O. 130.\ .'\()26. Sf. Louis. ~\'10 63 130:fa, 3 1-l-7::!S-7062]indicate that ;',,1RL is againdor mant. I was able to contact them in MurchIll' 1993 and rece ived a number of the t\'HU.rep rints which detai led amazingly complexcrystalsets. Ididn' t incluuc lhem in the S( lurcesbl'callsl' o f Ihc llnrl'i iahi lity o r thL' company.

" l low eveL nothing beats the masterlycra ftsl1lanship of K.E. [;:dwards" work in hisNodlos Ihat \\"orkl or Frct' (p ublishl'd I()77-dlcck with your library). He has cJcvated thel'tlll:-otn K' litlll of Ihe cryst al sci to a fine art.

" Describing his 40 mcte r hand crystal scthc says. ' ...11wiII tunc much abo ve and bl'l(lwthis. but till' -lO meter band is \\'herc it wiIItunc

Another ReconstitutedRadio Nut

10 take these loop s with me on trips . I aliicon cerned about 11 m\' will these he accep tedin my ha~gage . I only currv a portable per-sonnl tape ptnycr. Casio LCD T V. 2 Meterhandheld, and my SOllY IC F-200 3 with amen.lias whcu I am on the road!

Eric Tarini . ;\ IYNT. of Marion . Mus... ach uwus. wrote his gratitudc to columnist

S ~ i p Arcy. "A fter 35 yea rs, I am getti ng hackinto till' i\ ~ lIs hort wa\'e listening that fasci-nated me when I was I I and 12 years o ld.growing up in Detroit . i\'ly dad put up anuu lom-Icugth wire {In tile HHI Land I' d listen10 Atvl DX. hearin g baseball gamc s fromfumwa y citi cs on my n-trunxi stor Matsushita(now Panasonic ) - it seemed mirac ulous !We also had a vcry old shortwave radio fromIIll' 30s or -lOs, back when all rad ios we refurniture.

..i\ co uple of n1l1111hs ago. I bought a short-wave radio. starte d listenin g to world handrad io. I ordered a pile of ,\11' back issues toca tch up. and ca rne across your "milde w'1,:O IUlIIll in the July 1996 issue. I loved !J ectronns lllus tmtcd and Pnpulcn !Jcc!mllics

hac~ thCll(an1und [9(){)-61 or so ),l'vc n t!HlllghI didn' t ullderstalld lIlost of what I read: I surewish I had SO IlK' of Ihem today.

'1 was also fasci nated by amatc ur radio,hut didll 'l ~ III 1\ \ ' IH IW \(1 proceed . Back theil, itSCl' II IS li"l' you necdcd a ment or. or SOllll'o ne\\ 110 co uld pllint yo u in Ihc right direction.NO\\adays , therc's a 101more. and a 10 1 bl'tter.inlill'l natillll ;lbolltlhese topics.

"Arll' r Chri:-ot lllas. I houghl a co uple ofstudy hook ~ O il ham rad io. and passed my

Gebhardt sho wn giving (Ill introductory shortwa vepresentation at the Barnes & Noble bookstore ;11 St.Peters/nux. Florida.

Yes, I know, August doesn' t exact lyprovide ideal cond itions for distant rc-ccpnon (D X l . bUI it may well be the onlytime you and your radio ge t away fromman-made xnu ic and/or visit a new partofthe world troru which to monitor. And ifyou' re O il a beach ncar the salt-\....atcr .yo u're twice blessed!II' ICI

Phil Gebh ardt . au thor of this months'DX calllp feature and a resident of PortPerry, Ont ario. is an av id promoter ofradio wh erever he goes. l lcs picturedhere giving an introductory shortwaveprcxcntatiun at a Barnes & Noble book-store illSr. Petersburg. Florida.The boo k-store carr ies a wide rangc of rad io maga-zincs and books . including MonitoringTim es and ,\'(lft'/litl'Times.Barnes & Nobleenc ourages local hobby groups to introducetheir activities to the cun ununit y. (With sur-ficicnt notice we ' ll even give you com pli-mentary magazines to entice the crowd.j

Arthur Jackson, KASDW L expressed histhanks to Phil Gebhardt for an earlier arti c leon bui lding a mcdiumwavc loop (N ov l)( ll.and cred ited the art icle with rekind ling hisJ 5ycar love of mcdium wavc DXing.

"The articlestirred Il lY curios ityjus tenoug hto build one ill III )' limi ted spare time. Theresults were bet ter than I ex pected. WhetherI used my Sony IC F-2()()3 or the 10 yea r oldAi\illFM So ny Walk man. stations barely au-d ible sudde nly sounded like local snu ions.

.., made seve ral pan and constructionmodi ficutions:I . Full size 36) ptcapacitors are hard 10 find.

Electronic surplus sturcs carry car radioAM/F l'\il variuhlc ca pacit ors. Smaller but,ju st as useful.

2. I used adhesive Velcro strips to guide thewires around the ends of the cros sed sup pon s. The spac ing is II 16 inch,c\'cry otherrow is IIXinch .

3. Ity ouare lIsing a small radios (which miIl l'an,' ). mou nt a I inch by 4 inch board on aRubhciMaid . single level L ll.)' Susan.Mount wooden guards at eac h end of Iheboard. The lenglh should only be longenougll to fit the rad io and the loop antenna. Rotati oll beco mes simple."My ellthusias Jl I has rcsulted inlO Ihe con-

structi{lll{lf IWIIIIJ( )rl' I{HlpS.One Itlr l{lIlgwave( 1/16 inch spacing. 20() rt. of #:.() \\-ire). andone for I61{)J )OO kll z as described in thcarticle. The hlllgwa\'e (lIIe has en lered me inil)a ncw DX field (N BD Beacons l.

'CulTL' lltly, 1am trying to tl gure out a \ \':1)'

4 MONITORING TIMES August 1997

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COMMUNICATIONS

Internuts

One third of'thc stale ofl owadoesn' t ha velocal internet service so. in 1990, the statefo rmed the S~()O m illion lowa Com m un ica -tions Ne twor k (IC N ). T he obj ective was tobring free inte rnet se rvice connections tosc hoo l c lass roo ms . T his d idn ' t go over toowe ll. Phone companies a nd ISPs (inte rne tse rv ice pro vide rs ) comp lained that the ycouldn' t comp ete with a state-subsidized net -work. GT E, which was 10 begin offeringlocal internet access. ca nce led their plan s.T wo mo nths ago. the people o r Iowa - whoalso foo t the S~7 m illion a nnual co st o f theIC N- - had en ou gh and voted to get the stateou t of the telecommunications busi ne ss . butthe measure was vetoe d by the go verno r.St ate leg!..luto rv arc now trying 10 fig ure outwhat to do with the SJOO milli on boon-dog gie.

Internut /I

You may ha ve heard of Irid ium . the 55bi llion, 66 s.uell ite telep hone syste m. Usinga palm-sized phone. yo u' II he able to pho neto and from anywh ere on the plane t. T he fir stfive Irid ium ...atc llitcs are alrea dy in space.

Tclcdcsic Corp. is loo king to launch 22 8satellit es to provide high speed globa l wire-less internet access . Thi s one is a Boe ingCorp proj e-c t buck ed by Bill G ates.

Now l'OIlle-s wo rd tIl' ye t ..mothcr low-eart hsyslclll l..'al lcd Sky Stalitlll inte rn;,uional (5 5 1).Sky Station Inh: rnatio llal is " 55 bill ion net -work of 250 he lium-till ed - no kidding -" blimps" stat ioned IJ miles abo ve the earth .T he bl imps w ill rd ay cOlIllllunications inmuch the sa mc way as sate ll ite . A new solarpmve rcd "air tre;'ldin g" tech nology will re-poned ly kee p th \,.' b limp s st;,ltio nary for up to

Iridium, Bill Gates, and Blimps

the FCC spokes man sa id that the Comm ts-xion wi ll the n ...e nd the offe nding ope rator awarni ng let ter .

Ac cording to busi ness week. inte rne tgrow th co ntinues at a stagge ring pace . dou-bli ng to nearly -1 0 m ill ion people. Accordin gto the Harris Pull . nearl y 2 1'h- of a ll ad ult snow browse the we b. up from 21.5 m illion ayea r ago . The ge nde r gap is closi ng quickly.too. with wome n now com prising 4 1'k of allinternet users. Other inte rest ing data : 42'7c ofa ll interne t hou seh olds have incomes o fS50.000 or more: X5(k ..Ire whi te and 25'k arein the ir 40s.T he least co mm on internet ac tiv-ity : shopping.

Radio Waves Cure Snoring

Radio Waves Kill Civilization

(Jil l' way radiomiKhl he used 10CUT' snoring. I I

Rad io frequenc ies a rc now bein g to uted asthe cure tor sno ring. A oll llpan y namedSomnus Med ica l Tech nology has unvei ledequipmen t that unblocks hum an air passagesusin g radio W;'I\'CS. A rad io frequenc y ge nera-tor co nnected to ;'1 narrow needle pene trate sthe vurfucc oft he tougue . throa t or soft paletteand destroys ;'1 sma ll urea of inner tissue by

gcncnuiug heat between 15X a nd 176 de -grecs - - wel l below theboil ing point ," notesal'I Jlllpany official. Sevenhi IXmillion Amcri-cans suffer from sle ep di sorders. Five othercom panies - a ll ow ned by the sa me per son;IS Sonmus - also lise radi o wav es to shrinkswollen prostates and g) 'neco log il.'al lissue s...md kill cancer ce lls in Ilings and kidneys.

eB radio . Ar one time it W; IS Amcricusfavo rite pas time, surp;lss ing \,.VC Il basebal la nd sex . Now. un fo rtunately. the only time itge ls a ny publici ty is whe n an obnoxious C bcrge ls the neighbors go ing ut ,I full boil.

In Fc md alc . Michi gan. 40 res ide nts go ttogether at a City Counc il meetin g to de ma ndac tio n agai nst a lo c a l Cfscr . Accordin g toresi de ntv. the unnamed operato r lise .. a linearam pl ifier and to rment ... neighbors by crank-ing up the power and c urving at them throughthe ir te levisions. te le phon es, ba by monitors

and ot her electric a ppli ances. We 1I he,:~. watching T V anti hear II hig ' f_ yo u'

come thn)ugh.' sa ys Tom Pla ill.T he rc :-.ide nh ha w lurned ((l l.'ity l.'ounc il

for ;Ktion hcc ause Ihl' FCC rcpl ied ttl the irrcq ul... ts wilh a hrod lllr\,.' 011 \l,-'he rl' 10 buy

lilt e rs for th\,.' ir appliaJKes , 11 has 10 0 0wi lh the prod ul'I." say s an FCC~t1.aUJ~ZZ!!L spoke sman, If. ho we ver, the

FCC determ ines that theCBe ris using a ll illegal a mplifi er.

"No, rt'ally , it \ cool .'J IHIk l'ep plI ,\'hi,,~ down 011Ihal "talk " butt oll, ami prt'llySO OIl you ' /I bl' Krowillg Ilell'

appe"da~ l's , too '! "

Double Cell Growth?

T he di gital ce llular phone mark et gre w bya whopping 7Y,f last ye ar while the analogwas up just I -Vir . According to the mark etresearch fi nn. Dutaqucst . howe ver . ~1010l"0 iais not sharing in the growth, T he ir sales ofdig ita l pho nes dro pped 62 17,' last ye ar whi leEricsson and Oy No kia tr ipled . So me sayMnturulas use (lf CDM A d igital tech no logyhusdroppcd the unchorun its sa les. M oturulud ispu tes the nu mbe rs.

A study of mice e xposed 10 radi o signa lssimilar to those g iven off by cell ular phon esmay he the li n.. t co ncrete evide nce linkin g themob ile phones with ca nce r. In ' lI1 IX mollihstudy. mice ex posed to rad io signa "" weretwice as likely 10 develop cance r as the irunexposed coun ter pa rts . Says John Moulder.professor at the Medical College of Wi scon-sin a t Milwaukee . " It"s ce rtainly the firs tanimal evidence that suggcsts that radio trc-qucncics mi ght cu usc can ce r unde r so meco ndi tions ."

And On It Goes

Double Digital Growth

Newt Gi ngrich hopes to en...h ill on the l -c11phonc/scann cr ctmtrovc rsy o fc arlic r this year.Accordin g 10 rep ort s. he is th ink ing that themight sue Democrat Jim McDCfmOIt for anyro le he had in the rclc nsc orthc illegall y tapedphon ecull. A cco rdin g 10Rep. John Bochner.Gi ngric h co uld ta ke civi l act io n ,lga il1',1

~1cl krlllolt on the basis that he violated till.'Electronic Communications Privacy Act.

" We have bee n assure d that the Ju sticeDcpuruncnr con ... idcr... the di ....-eminut ion 101'the rape J 10 he as illegal as the record ing ( Ifthe tape ," s;lys Boc hner ...pc kcs ma n Ter ryHolt. However. the Florida co uple who rc-corded the cell phone call was ulti matelyfined just S5C)C) each .

6 MONITORING TIMES August /997

COMMUNICATIONS

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ban k. W hen e ver d ispatc hers tri ed to com m u-nicate with pursuing offi cers. the ir transrnis-sions we re jammed . T he ro bbe r escaped.

Thi s was not the first time . Grand Rapidspollee tra nsmi ssions have bee n ja mmed 35times in the pa st two yc ars . When police sentout an eng inee r w ith d irec tio n- find ing eq uip-me nt.thcy ze roed in on a man sitt ing in a FordEscor t. ;\ la rge a nte nna was on the ca r' s roof.W he n d ispatch er s broadca st a description o fthe car. the ja m ming stopped.

Pol ice o btained a warran t and se arched th eman ' v houxc . Se ize d were at least a doze nha nd -held rad ios. a hal f-do ze n walkie -talk-ie s. se ve n two -wa y radios, mic rophones.spea kers and o ther tran smitte rs. T hou gh hisnam e has no t been released, the ma n is said tohav e been a vo luntee r sheriff s deput y and thetraffic sq ua d's communications o fficer.

Communications is compiled by LarryMiller wit h hel p fro m Rach el Bau ghn. andthe ar t department at Grove Enterp rises. Also011 sta ff as o ffici al "Comm unic ations" mon i-tor s are the fo llowing good people who lookfo r, d ip out. and ma il items of inter est fro mthe ir local ne wspape rs : Anony mous. Alhany.NY; George Bea rd , Kan sas C ity. KS; C ha ne!Corde ll. Bra ss tow n, NC; Ken neth Du nn .Glassboro . NJ: Maryanne Kehoe . Atlanta .GA : Mr. and Mrs. Kevin Klein. Kimberly.WI: Ira Paul. Royal Oak. MI: RichardSta tc fi cl d . Brookl yn . NY: W a lt erSzc zepaniak , Philade lphia. PA ; Peter T am s.Los Ange les. CA: and Michae lW hite ,Gree ns-boro. NC. We also consu lted the fo llowingpubli c at ions an d list thei r nam es in g rate fulapprec iation. IJisl' l/tch Monthlv, Nat ionalSrnnning. Radio World. Russia Review. S(l/4etlite Times a nd \v5 YI Report.

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Pulice in G rand Ra pid s. Mich igan. weretrying to catch a WOIll.Ul w ho had robbed a

To Catch aJammer

"0 11, I kno w!How about this:'Jailbirds. M eettile Jailbirds,we're f ull offunand goodfriv-o-li -ty ... ,..

A fter the fall of the So viet Unio n it wa sho ped that Ru ssia mi ght begi n to learn somelesson s fro m the United S tates : dem ocracy.capita lism... tab lo id T V? It hasn' t tak en longfor fami liar trash to slithe r onto the Russianair wa ves. Hosted by Vlad imir Pozne r. anapo log ist fo r the co mmunist regi me oftenseen on the Phil Donahue Show in the 19S0s.is a biza rre show culled. "Person in the Mask."Gu ests ap pear in the stud io behind hideousmeta lmasks. To pics inc lude pimpi ng teen ageboy s. a KGB agen t who heads a pow e rfu l dru gma fia. and o ld standard ra n: like adulte ry .

Television in Russia

sho t out o r the sky. Cu lm er though ts pre-vailc d. how e ver. and De Nij s wu s ult imatel ysentenced to four month s in prison. No wordon what song the Dutc hma n is sing ing now.

T ra ffic at the air po rt in Groningcn in theNe the rlan ds wa s lied up fo r about 20 m inute searl ie r th is yea r wh e n pilot W im de Nijs usedair traffic con tro l frequ enc ies to se re nadelisteners with the the me fro m the Plintston csT V show. C lasping the microphone o f hissmall aircra ft and circl ing the a irfield. De Nijssa ng. "Hi ntston cs. Meet thc Fli ntston cs.they ' re a mod ern sto ne-age fam ily..." untilone Air Traffic Controller tho ught of cullingill the Dutch a ir force and havin g the cave man

Dead AirHundreds o f radio stations in Ohi o. Flo rida.

and Lo uisi an a were forced to tran smi t no th-ing but dead a ir w he n a close d-c ircuit Emcr-gc ncy A le rt Syste m test from Fli lvl Ajummcd .A test. intended for j ust W LS in Chic ago .affec ted a ll the o ther stations in the sys temwhen a FEM A op erator fail ed to dese lec ts tatio ns in the o ther stales . WLS . a primaryent ry poi nt s ta tion. requ ested the test as it wasco mple ting install ation of equ ipme nt to re-ccivc nat ional le vel ale rts.

Programmable "Oops"Radin Shac k recall ed all unsold stoc k o f

the ir new HT X-204 du al band ha nd -held ra-dio whe n it was di scovered tha t it could heprogrammed to tran smit and rece ive OUI o fband . Tandy VP Bob M iller sa id that " Rad ioShack wo uld ne ve r know ing ly do any thi ngthat wou ld compro mise our stand ing wi th theamateur rad io co mm unity o r the FCC" Sowhat's the futu re for the HTX-204? SaysT ony Mago ulas. Ta ndy' s Public InformationO ffice r in Ft. Worth, "T he radi o is gone andwill no! he re placed ."

A Texas j ury has o rdered an Ix-yca r-oldg irl to p'IYabout 57 mi llion in da m ages to (hefami ly ora boy killed whe n she lost cont ro l ofher ve hicle whi le an sweri ng a cellu lar phoneca ll. Kayla Se ge rs tro m crashed her fam ilyva n head-on int o ano ther car in 1996. losingcontro l whe n she reach ed fo r the phone . Athre e yea r o ld ho y was killed in the accident.Hi s buby siste r' s nec k was bro ken and theirfathe r suffe red serious brain da mage . T hec ase i..; said to he preceden t-sell ing because itadd ressed the issue of responsi bilit y in a naccide nt cause d by the use of a ce llular phone .

10 ye ars. SS I is asking the FCC for a port ionof the 47 G Hz band for thei r project.

Pull Off the Road or Pay

Fred Fred What's going On?

August 1997 MON ITORING TIM ES 7

Radio Netherlands HitsThe Dutch have a

saying about a 50thannlversarv. /t goes:

one has "attained theirAbrahalll ," a biblical

reference to aee erace. tl ' l')

and wisdom. As RadioNetherlands reaches the

halFcentulY mark. itlives lIlJ to that saying.

By Jeffrey M. Poulin, I

'1id'J()a/Ze11252 C..dnal ~Ive' RemIngton, VA 22134-2032

ht1p :/twww.crossllnk.neU-mflnel

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A tr. lIlsiti on a l !'>tage hegan in !lJ-l6 for aRad io j\;~ t herla nds . Part of th e pro posed st a-tion was a wo rld se rvice tho.lt would provide

Software for theShortwave Lis tener...

hac k and begun R'HJio Hc rrijzcndNcdcrtands in Ein d hove n. T hiswax the sta tion that an no unce dthe e nd of IIII.' war in EUfOJlI: to theDutch people.

Van den Brock.now a Major.wa s given authority OWl' the es-tabl ished domestic stations inHilversum. Among other dutie s,it wa s his respon sibility to re-mo ve those sta ll members whohad worked und er the Na zi occ u-pier s. This wa.. the offic ia l gov-e rnment poli c y. no t his 0\\11. b UIvan den Brock bore the brunt o f

the resentment s that arose . Man y of thesepeople . well -known voices in the Ne the r-lands, ne ver forga ve van de n Brock for theW'I)' in which he curried out thi s po licy .

Another problem developed ov er- the 'tone'of the dom e..tic se rvices. Van den Aroc k hadbeen heavi ly influenced by the unde rsta ted.prec ise ton e of BBC bruadcasts. Dutch stu-tion s. indeed most uft hosc in Europe , had hada more e xube rant pre sentation be fore the warand ex pected 10 pick tha t up agai n. The dashof these ex pec tations with va n de ll Aroc k'swartime HBC infl uence caused more hardfeelings.

The de sire s of the dome..til' b road cast se r-vices could not he e.lsily ig no red as theyrepresent ed fo ur in fluen tia l parts of Du tchsoc iety : the Catholic and Protestant churc hes,a nd thc two prima ry po litica l fac tion s. Ho cv-eve r. that s till di dn ' t an swer the pre - \v~lr goa lof a unified , d is tinct ly Dutc h voice fo r thewor ld to hear.

Birth of a Station

--

l lollund W.I" occ up ied qui c kly. T he ~az i sinnucdiutcly look over the dom est ic radioservice s for prop ugundu and security pur-pO..I.. .. . The Dutch sl.llT-. were ordered to con-tinue operating the stations unde r the ir newma-te rv. Altho ugh thi ....o -cu llcd cullabora-lion W.I" involuntar y. it led to antagon ism safte r the war that would lust for yenrs.

with Ilo lla nd occ upied. a Dutch ne wspa-[1L' r reporter in Paris, I lcn dri k va n den Broc k,gor tog ether-with se veral colleague s and sta rtedclande stin e radio bruadcusts tullullund usi ngFre nc h tacilitic... But Fra nce itse lfwas fa llingto the Hlirzkricg. and the gro up esca ped toLon don be fore Pa ris was taken . T here theybegun Rad io Ora nge . named fo r the Roya lHOllSL' o f Oran ge . the official voice of theDutch governme nt ill e xile .

U..ing the HBe' s Bush ~ I ()u ..e f.llililics andpmwrful Iran smiltcr s, Ihe ir hro ad cast s we relh l.'J 10 assist lhe Dutch llIltlcrg round and helpmainlain mora le among the ir o\.cupicd coun-trYllll.n. IBBC reso urces were lIsl.'dhy se w ralL'ountrie .. for the same purpn..es. )

I\y the autu mn o f 19-1-l. a few lTlollths afte rD-D ay, lhL' sOluhern h'l lf of Holl and wasIihl.' rah: d. V.m de n Brock anti his team moved

IH edia Network ( T(' II': Dialla .Il1llSSCllll lld .Ioll lll/llIllAJarks,

histor y lcs..on in Euro pea n c ul -tu rc . )

1997 ma rk.. the 50t h year ofRadio Netherland.. do ing ir.. job.and doi ng it well .

In the Beginning

Althou gh Radio Netherlandsofficial ly started in 1\l-l7, it.. roolsgo hack 30 years curl ier. In )9 17.Phill ip.., the Dutch e lec tron icscompany. be gun ma king tube.. forthe lled gl ing radio hobby an d ill-

l r ea/h er maJl Jan l'elleboer .\'110"''' i ll / 97.J/Jhoto.dustrv.TL'1l )'L'afSlater the Xcrhcrtand-,became the World War " and Brit ish Influence

firs t European country to ~e t lip a regularinternational broadcast schedule. That sta-tio n, PCl . wa s establish ed us a n econo micaland ve ry effic ient wa y 10 commun icate w iththe Du tch colo nies in various part s of theworl d. T hose colo nie .., e...pecia lly Indonesia.a lso prodde d a market for the rad im made hyPhi ll ips. Other European co un tries fol lowedthe Dutch lead . Within a few de cade ... . most ofthose co lo nic .. wou ld be indepen dent CO UIl -tries. bu t their e xistcn cc se rve d a..a sig nificantcata lys t in de ve loping ove rse as shonev'avebroadc ast ing.

In 192XEdd ie Stur tz began a Sunday ins n-un ion rh.u wo uld co ntinue for o ver flO year... .Say ing that the ca ll sign PCl stood forvpcacc.cheer, and joy" the Happy Station programwent 0 11 the a irwaves. I ii.. show' ... mono wasthe " happy station o f a friendl y nat ion." Sig-nifiGlIll ly, the liste nl' r 110 lo ngL' r had to spea kDUlch ttl 1L" lfll ahout the mu sical tnsle an dc ultural matlc rs in I io llnnd. A nJ il pn " "cd lhatIhere was a n audic nce fo r progr .lllb " with aDlItL'h alT L'nl.

The 19~O ' {" nnd 1 9 ~1r ..abp ..aw the cs tab-li"ihment o f fo ur domc~,;ti l' sl.'f\ "ite.., ('Je h w ithan a ffilialion in re ligio n or pol ilics. Theseaffilia lions still pe rtuin today. l lo \\'e vc r. therewas no uni lk 'J. nati on al yo ieego ing ou t to the world .There for e, in ItJ.' 7 T he Hagu d se'lto f thL" Dllh.:h Go ye rn ml.nt )appoillle J .1 com m issio n 10sludy tilL' mailer. It reeo m-mL'IlJ I.'d an o ver se as sho rt-wave ser viL'c nwde up o f ex -isl ing d{)lllest ic progranl s hutfU n hy a small. ind epe ndl..' nl

st~lrf.What migh t h,1\'e fo rmed

Radio Nethe rlands W.h newrrL'a lized. Ik for e the new SL' r-vice cll uld be eSlablis hed, lheNaz is in vad L'd Holl and.

Augu st 1997 MONITORING TIMES 9

Technology for Tomorro w

tcr a ll. the Ne the rla nds has centuries of'cu ltureund hist or y to draw 0 11 . magnifice nt artwork.orchestras. and a fr iendly. outgo ing populace .T here was no lack of materia l available.

If they weren' t go ing to shout. thcy wo uldmak e thei r broad casts fun and conversational .This wo uld not be "The Ne therla nds. theCountry:' broadca sting to o the r countric ... : Itwould he Dut ch pe ople talking about mattersof fun a nd interes t to other people .

The fir st English language broadcasts con-sisted of twenty m inut es of new s and com-mcnuu y three limes a day. A udiences wrote inwanting to know more ubout the place pro-duci ng the...c reports. which led 10 program son Du tch culture and popu lar tastes . At firstthe programs focused on the symbo ls of HoI-land : wi ndmi lls . woode n shoes. tu lips. and soforth. But it didn ' t take long to go beyond that.A sim ilar approach wa s e mployed in .111 thelangu ages they used in the ir broadcas ts.

Eve n though shor twave rad io was theirprimary mean s (0 di sseminat e programs, theydid n't rely on it alon e. The station prod ucedrecords ofclnsvical mus!c and othe r program -min go ll\ ing the fi nest techno logy avai lable ,and se nt them allover the world to be playedby local s tations as par t of Radio Nethe rla nds'transcriptio n service .These trunscriprions hadthe added benefit o f be ing able 10 target spe-cific audience needs. At one poin t in the1950 ' s they were se nding out 150,000 reco rd-ings a year.

Program content wa s never cons ideredsac red . It wa ... changed 10 refl ect cha ng ingtastes in thc Nc ther land ... an d a mong the aud i-e nce s. In thc 1950' ", the re wa s a ....h ift fro mcias... icul to jan a nd folk mu sic . In the 1960' saudiences wan ted more informative programs.Liste ner s could now ge t high qu alit y mu sicrecording ... from many othe r source ... hut thedocumentrric ... Radio Net herlands producedco uld not he found e lse wh ere . The c urre ntblend of programs dea ling wi th culture .... hi s-tory, education. and current cvcnts-c-somcserious and so me ligh thearted - is a result ofmeeting the audience "swishes.

Rad io Nether land ... always used the be"'ltc

AllShadesof Opinion

I?adio Netherlands

[,'''' 'r'-

., \~:~- .\.~ I Hucna...____ hastala liltima nota!

- - "[, ~ r- R~dio Nederland:AJangAneka

---- Pandangan[,- ;.,'r-"rt.;/~) Radio Nederlandeen Wereldomroep!

----- - "

Bumper slickers in [our languages attestto RN's global reach.

Radi o Ne the rla nd.. a lso se nds ou t uponreq uest. at no c harge, a q uarterl y newsle tterw ith backgrou nd s o n the staff. \vhat' s go ingon at the station a nd upcomi ng sho ws. I cspc-ciully like it beca use it g ivcs the sc hed ule s andtop ic s for th e ir ex cel le nt do cume nt ari e s.Aga in, request the Eng lish ve rs ion.

Don ' ( want to wait for the ma il? RadioNe the r la nds ma i n tai n s a we b s ite at :www.rnw.n l.Tn add itio n to sta tion and pro-gram info rmat io n, the \vcb site offe rs re alaud io of program s. readi ng sugges tio ns forbooks an d ma gazines rel ated to rad io (includ-ing M onifor ing Ti lll ('.\'). nnd links to other site sor int ere st.

posed unified Europe . la ng uagesa nd the di ffering c ultures wi ll no tdi sappear. The statio n has cs tub-ltshcd all identi ty of its own thatwi ll co ntinue its mi ssion and tradi -tion s.

A Golden Hall Centu ry

Rad io Ne therla nds ha s a richhistor y. There have been the sen-\HI S do mest ic e vents. suc h as when

the Queen 01" the Ne the rlands a nno unced he rabd ication in favor of the next roya l genera-tion . T here have been mome nts of fun. OneAp ril First b road cast gave the wa ve lengt hs.stra ightfaced. in fee t a nd inch es instead o fmeters.O r thc undi scove red open micro phon ethat se nt a progr am prod uction sess ion over asate ll ite sub-carrier.

Rad io Ne therl ands ha s alwa ys cncour-aged audience feed back an d sug gestions.Di ffe rent views fro m aro und the world letthe staff respond to c hanges in thei r lis te ne rs 'needs and wa nts. T his w illingne ss to c hang e ison e o f the reas o ns for Rad io Net he rla nds 'on go ing and increasing po pu larity .

Jo nath an Ma rks . Direc tor 01" Pro grams,revealed ano th er rea son . " Maybe [we re ma inso po pular wo rld -w ide I becau se we 're inde -pen dent and we ge nuine ly care about listen -ers . We listen to yOLl because yo u lis te n to us.I do n ' t thin k we ' rc ash amed to ad mit we enjo ywhat we' re do ing , a nd tha t comes ac ross in theway we co mpile the pro grams. This is a sma llco unt ry. so we ha ve to try harde r to shan: o urinfo rmatio n with others. O ther co untrie s shoutinfor matio n. We do n' t think that works Iforus ! in 1997 ,"

Is Rad io Net he rl ands meeting its goa ls '? Ibel ie ve so . W ith e ntertainment and infor ma-tion it p ro vides a wi ndow into the Dut chworl d . An d it ma ke s me wan t to kn o w e venmor e abo ut the country and its peo ple.

Ginger da Silva, host of I t Good Life. conducts allinterview.

to make the wo rld avvare of the Dutc h peo pleand c ulture. In the Un ited S tates we ge nera llyhe..rr the sho rtwave broadc asts . But Rad ioNethe rlands is inc rea si ng ly invo lved in te le-vis ion prud ucti onx. often in collahurut io n witho ther co untries. T he o ld record s have bee nreplaced by to p q uality C Ds of Dut ch CO Ill-po sers hy Dutch performers. Sat ellite tran s-m iss ion o f so und and picture lets them pro-vide ed uca tional material in Lati n A me ricaa nd A frica . T he in ternet a llo ws Radio Net her-lands to maintai n ever more infor mation rc-luted to its b road ca sts. Above a ll. the ne wtechnology per mits the sta ff to ta rget eachaud ien ce wi th timely nnd rele van t mate rial.

A measure 01" the success 01" this appro ac his tha t the ir Engli sh language prog ram s arccurried hy statio ns in Austra li..1. C a nada. andSo uth Africa fo r dome stic broadc ustx. T hL'Yrece ntly o pe ned a New York o ffice to pro-mole domest ic rad io covera ge in the UnitedS tales.

Wh at abo ut sho rtwa ve rad io whic h sta rtedit a ll? It ' s not go ing to go away any time soon.Afte r a ll. the ge ar is re la tively inexpe ns ive.light. e as ily powered. and av ..iilahlc e ven inle ss de vel ope d a rea s . A nd there is nogatekeeper or intermed iar y to break the lin esof comm unication .

Som ething that wo n't c hange is the vo iceof Rad io Net he rlands: "the Europ ean statio nwith the Dutch accent ," Even with the pro-

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The s tatio n can he reach ed in a num be r ofwa ys. T he mai ling addre ss is: Radi o Nether-lands, En gl ish Departme nt. PO Box 222.Hilvc rsum . Holl an d . T e lephone : +3 I 35 67242 22 (in the U.S. the number sho uld start with01 1). Ecmail: !C.lIcrs @mw.n!

T he sta rr always enj oys hea ri ng fro m youwit h comme nts on the ir p rogr am s or evenwit h sugges tio ns fo r futu re sho ws. T hey a lsooffer the usua l good ies. such as QSL curds.po st cards , bum per s tickers, etc .. as wel l asc atalogues of the ir music recordings and tele -vis ion prog rams. Spec ify that yo u wa nt theEng lish la ng uage ve rs io n.

Contacting Radio Netherlands

'\The Roughly Speaking crew U-'011l left);Max . Simone. Ho wie and Reza.

August 1997 MONITORING TIMES 11

I I do es n' t mailer if you DX 0 11 thelongwa vc hands or the shortwavebands. till' lament is a lways the same:Th e antenna isn 't long enou gh lor highenou gh }, Or. it may

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The twn-stery building used for th e OIJXA 's shortwave camp held each Novemberprovides she lter from th e cold, a dining area for meals, sleeping quarters, a largecommon area/or J)Xillg (II1t1 easy access to trees. Th e building is part of th eJUllllsfteld Outdoor Education Centre rued by groups of students during th e week.(Photo credit : Ja ck Hensha w)

ho i tip s. e specially if you have a board onwhich In di ...ptay the in for ma t ion as eac h OXcatch i..made. It can ab o increa...e the varietyof ante nnas . although random -length w in: ...ofte n ..cern 10 predomin ate because of the ir..impl icity.

What ~t~l rt'i 10 happen at the large r OXGllllp.. i~ increased imcruction. Th e- camp ul-Il HI ..1 beco me, a social event . Novice li ... tene r...ca n ge t adv ice fro m the veterans : pa rtic ipa ntscun ..:omparc rece ivers and ucces ...c ries: themcrit vof'thc latest gadgc t on the market can bedbcu ......eel. ,.. ... a bonn thai all thi s happensspomancou- lv. There" no need to fo rmalizethe proccvs wit h a pro gram.

One thi ng is ce rtain: whether yo ur cam pi~ ...mall or large, there arc no ru les. Youorganize the e vent howe ver you wa nt W ithinthe O ntario I)X A......ociation . the re are a lwaysse veral such eve nts in va rio us ...tugcs o f deve l-opmcnt.

Wh en I have had the c ha nce to exchangethe noi se of the ci ty for th e radio-quiet condi -tion- in a rura l setting. I' ve pac ked my re -ce iver a nd ...cizcd the op po rtunity . I may lakea long a roll of wire or a prefab antenna.Obviou ... ly. or ga nizati on is ut a min imum.

Slightly mo re ulab urut c is the event o rga -ni zcd by Joe Ka rthau .... He wor ks for 3 com-pan y that own" a park, The park facilities areavai lab le 10 employees and the ir fami liesthr ough out the YCilL Th rou gh the kindn ess ofthe ..:umpa ny and the pa rk ...tuff', we havebecom e Joe ' .. extended fa mi ly. The heatedchalet provides pro tec tion fro m the winte rweather and electric ity eliminates the need forbaucr y-opcrutcd recei vers. Th e indoor wa sh-room.. make life easier, roo! BUI best of a ll.there arc large trees and wide open spaces fo ran tennas.

w hat makes Joe ' ... Dx pcdi uon easy to or-gan ize i... th..u it is only

cc ives signa ls fro m a lldi rection s. T he len gthcall be ca lculate d usin gEquat ion # 1:

L = 75000/1 (1)where L is the len gt h inmeter s of the ve rtica lsec tion as well as thelen gth of each gro undradi al . and I' is the fre-quen cy in kHz. Ofyo uwant the length in feel.use L = 2-l60()O/L)

I ge nera lly select themidd le of the band asthe fr equency. For ex -amp le. for the 13-m cte rha nd. I wo uld use 2 1650kHz . In that case, thelen g th ( L ) beco me s75000121650 or 3.-16

FIGURE 1

me ters.Lis tcn c r, so me -

times a void usin g ve rtical antennas beca useof the suppor t problem s. T he ve rtical sectio n(made o f 13 mrn or 1/2- inch coppc r pipe ) mu stsome how be he ld in place a nd it mu st heinsul ated from the gro und. Insu lat ing the a n-te nna is easy if you take a lesson from com-me rc ial broadc ast sta tions. I set the a ntenna ona glass insu lator. Not the type they usc atbroa dcast stations- they ' re 100 expensive andthey arc des igne d for high po wer tran smit tingapp licat ions. Instead , I use a g lass j ar, suc h asajamjar.Th e outs ide surface of tile j ar bott omis oft e n concave. I in vert the jar. sink it into thegro und slightly and place the a nte nna on theconcave bo ttom.

Su ppo rting the ante nna in a vertical posi-tion is a lmost as easy. You"Il need two plasticsoda bott les. Cut the top of f both bottle s a nddi scard the bottom par t. You a lso need one o fthe bo ttle C:.lps. T he first hott le top is simp lyplaced over the top of the antenna and droppedto the bottom where it co vers the ja r. T hishottl e helps keep the antenna on the j ar. Th esecond bott le (w ith the bottle ca p scre wed on)is placed at the top o f the antenna. T hree gu y

It vertica l antenna cons ists of a single vertical leg ami a set ofradials, Th e vertical leg attaches 10 the cen ter con ductor of the

coax feedline ; th e radials are j oined at the base of theantenna ami connected to the (JItter conductor of the COlU:,

While a commercia l broadcast station might use I()()102 ()() radials, you '1/ tllIly need thr ee or four. III this

version. the vertical leg is insulated from theground using a glass jar as a ll insulator. Th e

top of a l-liter soda bottle ami three gllywires supp ort the top of the antenna.Jar

\ Guys (3)

\Plastib soda bott le

\

THE QUARTER-WAVE VERTICAL

Plastic soda bottle

""C

O ne of the eas iest antennas to erec t is thequart er -wave vert ica l show n in Fig ure I . O ne

of its advantages is that it rc-

One of the attractions ofa DX camp is the opportunity totry out new antennas. Here, Ontario DX Ass ociationchairman Ja ck Henshaw (center) holds a homemadequarter-wave vertical antenna ill place as Norma Kennedyhummers pegs into tire ground to act as anchors f or guyropes and Harold Sellers unrolls wire to be used as radials.connec ted directly to the recei ve r inpu t. Th erando m- length ante nna is attractive becauseor its sim plici ty and because it ca n he usedove r a wide ran ge o f freque nc ies.

Ke n Alexander ha s designed a lon gwircimped ance matcher that he (H I\ V m anufactu resand se lls. T he bulun s were on e step in improv-ing the perfo rmance of these an ten nas. Add-ing a hal un is {Jil l' of the simp lest imp rovemen tyou ca n make . Ofte n Ke n str ings up JOnme ter s of w ire that he the n connec ts to a balunand thro ug h coax into {he input o f themult icou plc r. This ena bles those me mber swho wa nt to attend the cam p, hu t are n 't par-tic ula rly knowled geable ab out a ntennas (orperhaps simply no t interested in antennas ) topart ici pate .

In an effor t to pe ak per formance 0 11 spe -cific ban ds. I e rec ted severa l ante nnas ondifferent occasions.

ca bin is re nted. Ken m ust co llec t money fro mthe pa rtici pa nts. W ill the group ca t together orwill par tici pa nts be respo ns ible for the m-selves? Are there en ou gh beds for eve ryone ?Idec ided 10 take advantage of the op portu nityto do some T V DXing usin g the rotat ab lebeam at the cabi n only to find out that the rotorcause d interferen ce o n the lower band s. Oops !

Beyond tha t, the ODXA has an annua lshortwave camp (althou gh some membersDX the medium and lon gwav e bands whileo the rs move up to the FM ba nd ).

Beca use this event can invo lve two to threedozen mem be rs, a commi ttee of four mem-ber s headed by Jac k Hen shaw, the n DXA ' sc urrent cha irma n of the board , overs ees theca mp org anizat io n.

Facilities arc ren ted fro m the Mans fi eldOutdoor Educa t ion Ce nt re for Fr iday nigh tth rou gh Su nday afternoon. Meals arc sup-pl ied by the ce nte r and slee ping acconuuoda-tions are dor mit ory- styl e w ith bu nk beds. Asingle liste nin g are a allows all part ici pants tohe toge ther to facil itate ex c ha ng ing hOI DXtips. A blackboard is used to list stat ions andFreque nc ies as they arc heard. T he c lub'smult icou plcr (several doze n rece ivers G ill beco nnected to a sing le antenna) gets a goodwor kout at the camp.

Experience has made organizing the eventeas ier throughou t the years. Experience hasa lso tau gh t us no t to ove r-organize. Th e soc ialaspects or the camp tend to keep things llow-ing smoothly sim ply because there are somany me mbe rs in atte ndance . Wh ile organiz-ing the camp is eas ier by com mittee . fo r ma nyye a rs t w o se m ia nn ua l ca mps weresingfehandedty organized by Steve Ca nney.T hat' s not to say it was an easy job for Steve- j us t that it is possible fo r a si ng le person toorganize such an event.

RANDOMLENGTH WIRESIn many cases. members slrn - IJ4

ply string lip rando m- leng thwi res. True . they arc O ft~'11 .long w ires (somet imes100 to 30n meter s

long), bu t equa l!y / _=-::::~R~ad~,~a~'S~(~3=o=r:4~) ~::::==t~E::::~;:::::=====::::::=~o fte n they arc ~_ _ _s im p I y

The Antenna's the ThingO ver the past several yea rs. we have en-

co ura ge d members to try different antennas.Per MTreade rs who wish 10 try some an tennasthat have already been tested and pro ven,her e are some of th e types we have use d atthe Mansfield site . You ca n try these e itherat yo ur DX ca mp or ut home.

Augus t 1997 MONITORING TIMES 15

TIme to Updateyour Passport?

Announcing Grove's Pre-publicationSpecial on the 1998 edition (

lVin' is a fa vorite material f orantennas. I I is easy 10 workwith and makes assembly anddisassembly of (lJI antenna aquick process. t\ one-wavelength piece of wire callbe used to const ruct a squareloop antenna (above), adiamond loop (right) or adelta laop (below). The[ee dlinc attaches to the twopoints labeled F.

FIGURE 2(THREE VERSIONS)

~iJ3-

""~FF ~

609nil nn_

Nu.......~ Sl~"on . a ' " "'"cd " 0"" '''''_"M'~ "''''''' 'um T>.ey,~M " """"" '-""'n,,,,.,..,, 0' . y"m.,,, , ,,,j """". '~u,lot", "",", I~"""" < "'" . ' , ~,," or """"bT his an te nna len d .... itse lfwe llto wire ra therthan copper pipe construct ion.Each en d (If tileho r izo ntal ....cctiun ca n he thread ed thro ug h allinsu lator and supported hy tree .....

FULLWAVE LOOPAs its name im plies. thi.... unt cnna u e" on e-

wave length o f wire . Cons truct ion i fairl ysrr.ug huorward-c- yo u fo rm the wire into a"q ua n: (eac h side is a quart er- wavcl cu uth hlng)and you string: it up ill the trees. Sec Fig url 1 .

Piau : an insulator at eac h of the four co r-ners. Th e top two insulators arc uxcd ttl attac hthe an te nna to tree branches: till' low er twoinsul ator s arc attac hed to a nc ho r po ints ill theground.

T he reedpoint 0 1" the anten na is 'll themidd le 01" the bo ttom k g .

If yo u ha ve till' required he ight. yo u ca nrotate the squ are a nd IllIHlI1 t the ant enna in ad iamond configuration . T Ill' lcc dp oint he -come.... the botto m vert ex. On ly on e tree i"nee de d to .... upport th is confi gurat io n.

Anothe r var ia tion i.... th l' de lta loop. Th ewavel ength of wire fo rm-, a n eq uilatera l tri-angle nuhcr than a sq ua re . :\'orllla lly. de ltaIno ps a re su.... ponded with the horivon tnl baseat the top and a vertex near the g ro und. T hee asies t p lace to utt uch the coa x fccdlinc i" atthe verte x ncar the g round.

Equ atio n #2 is used to calc ulate the totalle ngth of w ire requi red for ....qu are loo ps andde lta loo ps.

S = 306324/1 (2)whe re S is the leng th of one wuvclcugth IIIme te rs. and I'is the frequenc y in ki ll (FtII' k L'1.lise S = I005000/1}

Forthe 1.t-me ter hand .yo ul l need .1 06.124/2 1650 or 14 .15 me te rs o f wire . (Each leg o fthe square wi ll he 14. I5/4 or ab out 3.5 4 11 1l..' te rslong . ) We ac tua lly used this untcnnu on the15 -me ter band .

August /997 MO NITORING TIMES 17

phasing lin e . (Thi s eq ua tion take s in to ,.11..'-co unt the veloc ity tnctor otsofid po lyethy le necoax.)

P =247500/1 (3)wh ere P is the len gth o f the plla... ing line inme te r... . a nd I' i ... the freq ue ncy in kH/. (Fo rDX e rs who prefer 10 thin k in feet. u...c P =812oo8/L1

If yo u \\ ant to li... ten on the IJ-lIleler band .the antenna and eac h rad ia l le ng th is 3A6meters a, culculated earl ier for the quarter-wave vert ica l untcn na . The sp'Il..- ing be twee nthe two antennas is also ,\ A6 meter ... . Thelength (PI of the phaving line L I i, 2-l7500121650 o r II A3 mei er... . (By u... ing a diffe ren tfeed line co nflg u rurion . yo u '-.':1Il reduce theoveral l length of the pha... ing line. Refer I IIantenna manua ls for sugge... tionv.)

This 01 1111..' 1111.1 .lfr"y receive... he ...t in thedirection fro m Anten na 2 toward An tenna I.

For use on the 22-m etcr ba nd . the lengt h ofthe venicnls is a hit long. so I han: to admit tore sort ing to lIsin g a pair of modified trapvertical s de sig ned for the 20-Jl1ctcr ham ha nd .

It' s wort h not ing that w hile cuch of the ...cantennas was de signed for usc 0 11 a specificshortwave band. they pull in signals on manybands-c-thcy s imp l) perform bett er ncar thedesi g n freq uen cy.

FIGURE 41\ II IUJllgh it uses the samelength of wire as allinverted L a ll / e ll till , th eflat-top T an tenna may bea more convenientconfiguration i ll somesettings. The [eedtineattaches /0 the two pointslahelet! F.

.

IL1

I~ ~ ..--- iJ4

~'l "---

90Q...1111 - - - ....,...,= "...- - 111100

. - - - L2

L1

FIGURE 3Du e to .\P lICl! limitationsor frequ en cy. a verticalantenna is .w m e';1111'.\"impractical. III thai caseYOlt {'{Ill bend th e lop ofth e ant enna to fo rm {IIIinverted l , (Wli 'II1Ul .Connec t the feedlinc tothe points labeled F.

Rad ials (4)

Radials (4) ' '' ' - - - )J4 _ Go Fly a 1(lle

General ly. the lon ger the vert ica l sect io n.the better the untcnuu performance. We usedthi s a ntenna 011 the 4 J-ruc tc r ha nd .

FIGURE 5

And for something a little out of the o rdi -nary. try john Grimley ... approac h. At 0 111..' ofthe camps . Jo hn attached hi s untcnnu (a ran -do m- leng th wire ) to a kite and sent it nlott.

Whether yo u cx pcrfmc1ll w ith ante nnas orjust enjoy the noise-free condit ions in a ruralset ting. or gan izing a DX camJl will add 10eve ryone' s enjoyment o f the radio hobby.

-~-)J4--.=i)J4

q uarter-wave length spac ing bet ween the twovertica l untcnn u.... yo u G ill a lso calcula te tha tdis tance u'ing Equa tion. ( I I.

To produce allantenna that rec e ive ... best ino ne gene ral direct ion. the two vertical anten-Bas need 10 hI.' con nected together using aspeci fic length or coa x. T hi... ve rsion usc ... alen gth eq ua l to :'\iJ-l . You'H need to u...c Equu-lion #3 to calcul ate the length of th e coa x

PIIll.H!d vertical antennascall provide a variety ofreception patterns.'\ 1110 1l~ IlI el11 li r e th efigure 8 pattern, tlu:three..leaf und fo ur-leafr OH' patterns and th ecardioid pattern producedby th e configurationsho wn here. , \ singlevertical antenna willreceil'(' siK"al.'if rom lillyco"'pa,\'.\ {!in ,(tion whil('th(' two pllllSl'd \'('rli ca lallte1ll111.\ shoWIl h('rer('('eil'(' ,\1KIllils !Jesl .!i'tunth e din'clio n oiA llle ll" a 2towartl ' \Illellll ll I.

FLATTOP TA modification of t ill.' inverted L. the 11.11 -

top T ante nna . ;Ib u U:-'C s a quancr -wuvclcngt hof wire. In the flat -top T. however. the hor i-zc mallcg i, centered on the verticalleg.See Figu re ..L

A, with the inve rted L. the longer theverticalleg. the bcucr the anten na per for-man ce. Thi s dc vign \\ a , u...ed n il the 3 1-meter band.

PHASED VERTICALSIf yo u want to u...e a vertica l ant enn a.

but don't nccd for wanI) 10 hear 'ig na l...from cvc ry direction . yo u ca n II , C twoqu arter -wave ve rtica l anten na .... Depend-ing on how tar apa rt the unt cnu a-, arc a ndhow long (he coax ca ble i -, thatjoin... them .yo u ca n prodlll..C an antellna a rray tha ireCi.:in: , het ter ill sOllll.. d in.:c tion... than illother t.li rl..t..'t ion....

Fig ure:' show... 0 111..' ...u l'll . IITay . Yo ucanlise Eqllalillll. ( I) tlll..'akul all.' the lengthor Ihe antcnn.1 and the r:ldial.... By u... ing

18 MONITORING TIMES August 1997

[-.;:::]ORDERING INFO: 5a\lSlactlQnGuarantEl Elanllnelor 10 days, ,r flOlp1ea5Cd, rNurn,norog

By Chuck DeLongfie ld /(N6CF, AFA6FG

" Jlin):J/m l,ji",h in): n 'e1, lead1I'('i1:hl, alUl a n 'elt'd anlen na art'all y ou Jl eed f or a g o-ally where),t'rt ica / alll('J I1Ia. RightmoJ( photoJho U'.\' ho w the n 'el at/ac hes ( 0 th eful'! lin t' Im .H' OJl (h e II'ri.\"lsupport.

, \ few Wind, I I f warni ng befo re you shmll-don ' ' land di rectl y benea th thel imb yo u areai llling .u. Remember that the wei ght cunril't IL'IIL'1. Al so . III:lKe- ce rtain that [here arc nopeople. uuinuus. or prop erty tha t can comeiuto your line-of-sight. Of} 1/01 aim this at orncar I'0ll'l'/" 1'011'.\. The launcher is \T ry effl-l' iL' III , I have been able In reach several hun-drcd fccr with it. Fortunately. the insta lledred dtlc" not pre ven t the - lings ho: from beingused cOII\'L'll1ionally, so you can practice you raim all you wum hy pl inking nt tin C:IIlS. etc.

Your chovcn branch vhould be clear andabout ~ :; - 30 teet high. Be sure to release thetlnnu b-vtop hdon:laullching , Alh.. r you havevhot I Ill' \\ eight ove r the de:..ired brunch and itha-, return ed 10 the ground. turn the crank 10lock 1I1L' line. Fold and wrap ,I"lI1all

10493

Table 1

(1}Shared use With FEMAUrbansearchandRescue(USAR)teams(2} May beusedasitinerant repeateroutput

Frequently-used UHFchannels (in MHz)408.400 (I) 409.000418.050 (1)(2) 418.075 (1)418.575 (1) 419.600

Channels to check for HF activityAlltreqs kHz. generallyuppersideband5211 5236 6809 997310891 14396

mcnt " A' band. Mo st ofthe se freq uen ci e s hav esha red use with ot her fed-e ra l agencies. particu larl yFEM A, and may or ma ynot he usable by DMATina spec ific geographic re -gion .

DM AT teams are a lsoauthori zed to operate onma llY orthe fed eral HFnet -wo rks incl ud ing those ofthe Shared Resources highfrequency radio program(S HARES) which is oper-ated by the Natio na l Com-m uni catio n s Sy s tem

(N C S). Th e table lists so me of the com mo nIIF freq ue nc ies tha t co uld be act ive withDt\1AT traffic in a di sa ster s ituatio n.

Many DM AT tea m s o pe rate in o the r parts01" the VHF and UHf bands as we ll. and mayusc busi ness. it inerant , publ ic sa fety. spe c ialc llle rgency , medical serv ice, und e ve n GMRSfre q uencies . Teams a lso use a mateu r rad ioan d most Dl'vlAT comm unic atio ns officersarc licensed amateur rad io operators. Si ncethe purpose o f DMAT is e me rge ncy medicalse rv ice and d isas ter rel ief. and since the sereams ope rate a s an arm of the U.S . go vern -I11 CJ1l. it is co nce ivable tha t the y co uld sho wlip on just abou t any freque ncy in an cmer-gcncy situa tio n.

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Team member s hold fulland pari time posit ion s out -s ide o f the DM AT tea m andse rve o n a vo luntary basi suntil such time as they a rcacti vated for federa l e me r-ge nc ies. Wh en deplo yed Oilfedera laxs ignnu-nts . thcy arcswo rn in as compe ns atedtemporary employees o f theUSPHS. Dep loym ents maylast anyw here fro m a fewdays to a few week s. S inceteams are likely to he de-plo yed int o are as wh ere theloca l infrastr uc ture has beenseve re ly d isru pted , e ac hte '1I11 me mber mu st curry e no ug h supplies,incl ud ing food and wat er. to be se lf-s uff icientfo r at lea st three days.

C ommunications is a vita l element in theo peration of Di\l A L Wh en on de plo yment.teams mu st ma inta in com munica tio ns linksw ith their o wn team memb ers. w ith local andsta te auth orit ie s in the di sa ste r zon e incl ud ingloca l health care fac ilitie s, and w ith m il itaryauthorities and othe r federa l di saster rel iefagencies as we ll as wi th the team ' s IHlIIle baseand the N DMS natio na l headq uart e rs. Theteams must al socom muuicate with the US PHSManagement Suppo rt Unit (MSU ) whichserves as the 011 sce ne command and controlliaiso n be tween USPHS, DM AT. and the lo -ca l corruuunity. These communic atio ns uti-lize a variety of methods inclu di ng lundline .ce llu lar, and satel lite tel ephone, VHF, an dUHF, rad io for sho rt ran ge commun icat ions.and high freq ue nc y (H F) radi os for med iumand lo ng ra nge com mun icatio ns.

Each team has developed its OWI1 conuuu-nlcatlons system. So me are very elabora te.....orne arc ve ry basic , and so me arc in between ,T able I is a list o f UJIF radio frequen c ie sassi gned to DMAT team s on a nat ional oasi s.These frequencies a re located in the gove rn-

MOBILEMEDICAL

TEAMBy Patrick M. Griffith, NONNK

Communications Officer, DMAT CO-2

DMAT

Disu stcr Medica l Assis ta nce T ea m s(J);vlAT ) arc an importan t par t o f theUnited State s go ve rn me nt ' s na tio na lemergency response network. Operating in amanner that is remini sce nt or the legendarym ilita ry f\i1.A.S .H. uni ts. DM AT s primarymi ssio n is to carry out Eme rge ncy Suppo rtFunction #X(health and medica l services) ofthe Federal Response PIa" hy providing mcdi-culca rc and ev ac uation 10 vic tims of na tural orman-m ad e di saster s.

DM AT s have provided aid at man y or thela rge st d isa sters in our nation in recen t ye ars.including hurricanes in Florida. Hawaii. andthe Virg in Islands. the No rthridge. Ca lifo rn ia.earthq uak e . and the floods thai ravaged themid we st. T hey a lso assisted at the bo mbi ng inOk laho ma Ci ty.

Though de sign ed fo r respo nse 10 federald isa ste rs in the Un ited States and its po sse s-sio ns, some or the 4 1 DM AT team s ac ross theco untry can also be USL'd in the "lean forward"standby mode for large sca le e vents with thepotenti al for ma ny medi cal victims . suc h asfor last sum me r's Olympic Gam e s in Atlanta.

DM AT te ams are organized unde r the Na-tion al Di saster Med ical System (N DMS) whichis a nationwide medi cal mutual aid syste mestab lish ed ill joint coo pe ration with the Fed -e ral Eme rg cnc y Munagem ent Ag e ncy(FBvl A ). the Depart ment o f De fense (Do D ).the v eteran' s Administra tio n ( V AJ. an d theUnited State s Publ ic llcnlth Se rvice ( lJS PIIS) .It is the US PHS that oversees the ac tual dai lyop eratio n of the DM AT tennis fro m their Of-fice of Eme rgen cy Prepa redn e ss (OEP) inRock ville . Maryl and.

Each team is typically co mprise d of 120me mbe rs. Many o f the se team me mb ers aremedica l pro fe ss io na ls includ ing physician s,dent ist s, nurses. paramedics . EMT s, respi ra -to ry therapi st s , pharm ac y tec hnic ians, an d

11l0 1\~ . Th e teams also incl ude suppor t pcr son-ne t suc h as communicat ions offi cers. logi sricsspec iali sts . maintenan ce. sec urity . and admi n-is trative personnel.

August 1997 MON ITORING TIMES 21

UTRA PLUG-I N COILS

Whc thcru r not yo u were around in the late I~50 , nr earl y 1%0, tn experience them.lilt: Knight "Oce an Hop per' shortwuv c rece iver, rem ain SO I11C of 1111..' mostcnig tuutic and revered conuuerc inl unit s ever de vised. A recen t resurgl'llce ofinteres t in these rece ivers has dri \'L' 1l the "collector s valuc ' tt o ma ny times the ori gina l cos t. Th ehistory oft hese little unit s see ms rathe r hland, but man y ow ners firml y be lieve the final chapterhas yet to be writ ten. A nd if you cann ot find one of these receivers for sulc. take heart : we' lltell you how to build one righ t here.

The origina l Ocean Hopper wa s a two-tube beginner skit nvai luhle fo r aro und eleven doll arssome 40 years ago. It had 10 he the \vm ld' s lowes t-priced com merc ia lly available shortwavese t. Many ham s go t their sta rt wit h one 01'" these. Even mor e ham s. the author inclu ded, onl ywi shed they could have owne d one. Desp ite . or because o ft he low price, some inherent dangersexis ted.

By AI Cikas KA9GDL

Helping Hand forThe Knight-KitOcean Hopper

. .7 9 ,

... 6 .5;

$10.75

BROA DCAST, LONG WAVE &SH ORT WAVE RECEPTION

Mo de l 5740

T he f n mo u s ' 0,:1 ' ;10 Hopl''' c ''rc c{'; v (,>r kit- ~" n ll ;lt i() n;\ll y lo w .pr;c"J -lop" for cn joyabl.. b rond,

coat . Inn I'( wa ve a nd shun wuv v rt:cc l' t inll . Hid,lyaenaltive rC/:CUl!ra t i" '. l y l' ''- ci rcuit . Klc~'l1cnt head-phone receptio n " can be U!lM "'"ilh 3.-1 nhm I'~Ispeaker o n s t ro n'lt b roa dc .. ~ l band lO l.;l.tlo n:J. SUP l' l i

Since they used rect ified AC lin e vo ltage.a severe electrical shoc k hazard was part ofthe risk of using an Ocean Ho pper . AlliedRadi o. marke ter of thc kit. wa s ve ry ca utiousin the in structi on s. Neve r use the receiver ona sink or metal bench . Ne ver g rou nd thechass is. Anti neve r connec t the unit to anou tboard amplifie r. T he risk 01' .111 e lec tr icalshock was a lwa ys present wh en u... ing thefinis hed kit. In spit e of the r isk . hams antisho rtw ave listeners by the thou sands huilt a ndused these kit s and lear ned 10 love them .A llied Rudiuu lso sold improved ste p-up mod-cls. the Space Spanne r and the Sp an Muster.while compe titors such as Lafa ye tte Rad iooffe red the nearly ident ica l "Explore-A ire.'

The Ocean Ho ppe r po sse ssed a unique andint e re sti ng ch arac te ristic. It wa s. beli e ve it ornot. possible to orde r a manual from A ll iedRad io. sc rounge the chass is and part s. andbuild a working unit from sc rat ch. This theauthor ma naged to do in 196.1 T hirt y yearslater. the author d id so once again . as theoriginal had long been disca rded. Fina lly. theautho r de ve loped a "s({/i" Ocean Hopper.whi c h. wh ile preserv ing the styl e a nd iutcg-rity of the or ig ina l c ircui t. has brought im-provemen ts where they arc most needed.

The or ig ina l circui t consisted of two tu be s.a regene rative de tector ( 12AT6) and aud ioamp lifier (5 0C5). A third "tube" was a 35W4power rec tifier. which d id no thi ng for recep-lion . in those days all the tube filame nts we restru ng together in se rie s and powered directl yby the II () Vue ho use current. T hai sa rnchouse cu rre nt wa s rectified into the B+ DC bythe 35W4 . T his is wha t ma de the Ocean Ho p-per such a danger ous shoc k hazard .

As you can sec, 12 and 50 and 35 vo ltfilamen ts only add to 97 vo lts dropped by thec ircu it .T he re mainder of the I I() VAC hou se-hold vo ltage wa s d ro pped hy a 20()ohm resis-tor. which in effect just wa sted pcwcr. !n thosedays the recommendation wa s to po we r therccci ver th rou gh an isolation tra nsformer. butfe w owner s bothered.

Building on a good ideaIn 1995. the author soug ht a way to dup li-

cute the Oce an Hopper' s simplic ity hut with asafer power circuit. Usi ng no th ing mor e tha nj unk box parts bo ug ht at a fe w hamfcsts . theauthor managed to co nstruc t a Sa fe OceanHo pper. The orig inal regenerat ive de tec torwas pre ser ved in its e ntirety : the I2A T6 wa ssubs tituted wit h a 6AT6. a six-vo lt vers ion ofthe sa me lube .

Th e 50C5. howe vcr. turned nut to be aproblem. No IO\v-fil am e nt-vo ltage vers ionsofthe tub e ex isted . so the audio stage had to be

redesi gned. The author c hose 10 usc the popu-lar 6AQ5 tube. chea p and eas ily av a ilable .The base di ag ram diffe re nces requ ired theaudio tub e ci rc ui t 10 he completel y re wir ed .Other major parts were obtained by ca re fullysift ing th ro ugh junk bo xes at loca l hamfc srs.

T he Safe Ocean Ho pper circuit is show n inFigure J. By uving a pow e r transformer w ith6and 125 vo lt sec onda ries . the circ uits ma y begro unded , and the shoc k haza rd virtua lly d is-appears. If a 12 vo lt fila me nt tran sformer isavail abl e . usc the 12AT 6 a nd 12AQS tubesinstead.

T he o rigina l Ocean Ho pper used a se t ofpl ug-i n co il fo rm s to acc omplish ba nd c ha ng-ing. T he ab sen ce of a vo lume contro l wa s

FIGURE 1

The original top mill bottomviews of the Ocean HopperModel 740.

Restores Horizontaland Vertical

Sync lines from DistortedAnalogue Video Formats

for free lnlcnr ciicnPo,kogeonIcmpleted llnils ond P, idng~ Coli 219-236-5776 =

R,C. Distributing' ro Box552 South Bend. IN46624

Augusf 1997 MONITORING TIMES 23

most notable . Audio output was avail able toe ithe r a 2000 ohm high -impedan ce he adset ora 4 ohm speaker. Sad to say. Ocean Hoppersdo n01 power a speaker very wel l.

The Ocean Hop per regenerat ive c ircuithad anothe r un ique characte ristic . Th e rege n-erative "t ick ler" winding was placed in theplate B+ high voltage circuit. Thi s results in asupe rb rcgcuc nn ive detec tor ci rcuit. whencompared with the tune d "grid ci rcuits" usedin a lmost every oth e r regenerat ive rece ive r.Th is means yo u sho uld /l e l 'a c hange co ilswhile the powe r is on . Ditto for the author' scircuit.

One unique as pec t o r the Knight OceanHopper was the tuned freq ue ncy ci rcuit. T hetu ning co il was placed ac ros s three separateluning capacitors. The smallest was the bandspread or fine-tuning capac ito r. T he othercapac itors com prised two sec tio ns ofa gangedc irc uit. only the sma lle r ofwhi ch was used totunc the shortwave ba nds.T he larger. o r third.ca pac itor was tied 10 the final pin on the coi lsoc ket , and was co nnected by an internaljumpe r w ithi n the Broad cast Ba nd andl .on gwa vc co ils . ( It is suggested tha t yo u no ttry to wind ei ther of these yo ursc lf.j

Th e poin t o f all or this is tha t yo u can usea sing le-sec tion ca pac ito r. as the author did.fo r the main tuning ca pac ita nce. Thi s wil lsim plify your needs. If you have a two-sec-

Insula tedplas tic

spacers-A must!

Ant.jack

6AT6 C)

AnI. TrimCapacitor

Coi l Socket

WITH THE SW2 SHORTWAVE RECEIVER.Drake pu ts the whole world in yo ur hands with the SW2 Shortwave

Receiver. Tune in AM broadcast, amateur, CB or sho rtwa ve bands wi thcontinuous coverage from 100 kH z to 30,000 kH z. Sing le sideband operationand AM selectable sideband sy nchro no us detection, brings the world closer toyou. And with the op tiona l infrared rem ote control, the world is in your han dseven when the receiver is out of reach.

To find out how to ge t your hands on the world , call Drake at 1-800-937-2530.

DRAKE230 Ind ustrial Dr. Fran klin , O hio 45005

pho ne: 5 13-746-4556 fax: 513-743-4510on-line: http:/ / \\'ww.rldrake.com

110 VAC In

AC Switch

RCA Jack

1/4" Phone Jack

II

6AQ5

~r'II~Bkll Output-r-

3kll'2W 63V~

. "3 IIpow~ CHANGE VALUESCho/ e HERE TO ADJUST

DC VOLTAGES TOl kll TUBESlW

Bridge Rectifier2-4 AMP 200 VDC

~

MEASURE110 VDCHERE "".

100-1000 pI

47k1! ,IOB2Kll/T

40 uto '7300 VDC

40 ufd J:!300VDC TN_C.

1 Meg. U

6AT6

.05

2

MEASURE/""BOVDCHERE

Jumper-optional.see text

7

5.6

. 10kll-:-+- 1- Tuning cou.

'0 turns #20

FIGURE 3

COIL

Schematic for the aut hor's"saf e" Ocean Hopper.

Regen. TicklerCoil. 4 turns #20

I,-.r>,

t - r-I

Alternat eJumperif used

470 ku 470 IIlW

25 or 30 ~If50 -150 VDC

Optional.see Ttext

Band spread.any value

Main tuning.365 pi

tion ca pacit o r. USl ' onl y the sm alle r ...cct ionand 11':L ve the larger sec tio n di sconnect ed .Thesma ll antenna trim mer ca pac itor must he i ~oluted fro m ground . ;I .. it i-, in -cric... \\ ith theantenna inpu t lcud . If in ..ulat cd tp lavuc. 0:-ramie. c tc.} spacer.. an: 11\1I ava ilable. ...ornemeans or i ...oluung this ca pac ito r will have 10he sub..ti tutc d, i.c . wiring. it aero ..... a te rm inalstrip. t h e a bananajac k fo r till' anten na inpu tte rm ina l.

The a uthor' s c ircu it replace ... the outpu ta udi o 10 all RCA jack . wh ic h ca n be con nec tedto e ithe r a low-impedance " Walkuutn" sty lehead ..c t. o r to a Rad io Shack speaker-amp.\\'I1I..' n fed to an ou tbo a rd a mpli fie r . the Oce anHopper make... a dan dy. iue xpc nvivc sho rt-wave set. It i..es pecially appealing 10 the flrst-lime bui lder. Paris arc ... til l available cheaplybUI yo u' !l pro bably ha ve to do some hu nter-gnrhcrcr ...carchiug in order 10 gt:1 them. The

circuit is very forg i\'ing on capac itance andre s istor \ '"l! IIl: S. and yo u C;1Il w ind yo ur owncoi ls ea s ily . The original fi-pin ~( Id..et and coi lform s art: used in the author' s rig . hUI may bethe movt d iffi cu lt ite m ... to loc at e.

Finally. the autho r used a cha ....is and frontpane l de sig n as do....c 10 the o rig ina l as pos-s ihlc . Th e fron t plat e measures vix inche s byten inchc ... . the same a ~ the or ig inal OceanHopp er. an d is lcucrcd with while prt:~ s-oll

Photo of the chossis tayout oftheauthnr's revised ()( '( 'lIIJ Hopper. A uthor 's revised m odel features (Ill att ractive fro nt pnnel.

26 MONITORING TIMES Augus, ,997

Slj(' In..:.. S( j(' HuiJdill}:, U 7.l7 SE, 26th Sl. n.. Jlei. Il~' . \VA . IJXOO, USA" .( I B,, '\. .l5:!t.. I}xOOJ Fa , : !06..7 Hl-f,.' X~ or 7~ (1 - 7 1 7 .'l, 'I'd : 20(,- 7HI-63 10 or

] .:-; IKI2S'j 7., 31 E-m ai l: S ac ti ve and U' I.' the handspread capacitor hi fine-tun c the signal, O ncethe n mtro l... nrc bala nced. you wi llcnjoy hoursof listening, As a bon us. the Ocean Hopperl' in:u il l':1l1 eW I1 pnll.css Ihe slrongl..' !" C W andSS B , ignal s on the ;\I11alc: ur hallll-..

R.eprints (If Illanuals fl)r tilt." Ilrig inal ( k l.anItl)ppt."r arl. ;\\'ailabk rnHl1 Ili i\ lanua l... 1'0Box XU::!. ('mllKil Blufrs. Iowa 5 I50 ::! . Pan,are where yOIl lind lhl..' m,

Virtually ;IIlYG lp ;K i t ll r \allll..', \.':111 he u, edfor the lU ning l..'i rl..'ll ils. Your ti r, 1 , hon wa\L'ctlil .... anIK \\ 'ound from # ::!() wire tlll a I -inchor 1- 1/--l- -il1dl 1'01'1I 1. Usc .... lurns I'mthe 1il'J.. lc: rwinding and l) and I()ILJ rI1S for IIll' llllle wind-

Wind both calls Insame directi on

MlIl imurn 4 pinsIf plug-in formis used witn asocke t

COILFORM

August 1997 MO NITORING TIM ES 27

Personal Communications ServicesDan Veenemandan@decode.rorn

Picl< a Pocl< of Packets

AI\OlS

162160 kHzS30 / unlimited

selected areastypically about 28.800500.61 to 390210928

nationwide8.0005122 to 1004 to 8Mobile: 896 to 901Base: 935 to 94120012 kHz$30 /100 kilobytes

natiom'/Ide4800(19.200 in ltd areas)24032 to 7800 (SMA band)60025 kHzS20 120 kilobytes

lmcmct. corporate and pcoon.r! co mputer sy ... tcm c. an d 0 1111."1' A R I) IS..ubscnbcrx .

Every A RD IS ...en icc area ...uppo n s. at a minimum. data rates o f-I-XOO hit s per ..ccond (hp... ) ucing a ~ I otorola Iran ... mi ...... ion protocolcalled MDC--J.XllO. In a han d ful o f majo r met ropol itan a rea ... anot he rpropriet ary ~ l ll tortlla protocol . l{D-I.A P. is \I"'I..d to ...up port -,peed .. o flip 10 !I).200 bps, Rega rdl ess of speed. each protoco l makes usc orerro rdetection and co rrecti on info rmatio n ..cut along with the data . a ...\\"i..'11 as a llowing had ly gurb lcd pac ker.. to he rct ran ... nut ted . A sing lepacket c:tI1 hol d up to 2-J.Oc ha rac te r.... a lthough the ave rage i... abouthullthat ... i/c .

More th an DOO ha ...c slalio lls pro vid e scrvicv to A RD IS use r...tran vmiui ng ut an average power of -1-5 watt v. Mo bil e unit e tran smitu... ing th ree to four wall s ' If power. and a ll rad io conuuu nic ut ion tak e..p lace in thl..' XOO i\1HI S pecialized xl ubi lc Rad io (Si\..l R ) ha nd .

T he 1Il1I"! rece nt pricing intomuuion ! have ...how, a "Datul ' uk 20:'the leas t e xpe nsive plan. ut S 11).95 II mon th lor 20 kilob yrc... o f dat u.

RAM Mobile Data

Rr\ r\1Mo bi le Data i.. the-... 1..'..' 1md lar gest \\ irc !c...... da ta conuuunica-lio ns pro vid er in the Uni ted State Founded in 19X9 hy RAMIl n lad"::lst ing C ()rpora til111 . Bcl lSlllllh !1CnI IlHlrc Ihan S3()ll m illio l1 h lbuy -I-9f1, 1If the l'Illllpany in I9X9. R r\~ I ~ I