trv for 2,3 ghz eme
TRANSCRIPT
TRV for 2,3 GHz EME
DIFFERENCES OF 2,3 GHZ BAND AROUND THE GLOBE
Zdenek SAMEK – OK1DFC – OK5EME
EME traffic and QRGs use
Australia 2300 – 2302 MHz ( VK3XN – 2301,990 MHz )
USA 2304 – 2306 MHz ( Rxing 2320 for cross band QSOs )
EU 2320 – 2322 MHz ( many countries can to use full range of 2,3 GHz)
JA – 2424 – 2426 MHz – problems with Wi-Fi interference ( 2015 – year
expecting 2400 – 2405 MHz )
Traffic: CW – SSB - JT65c
Technical Seminar Zieleniec 2014
Minimum for test of EME QSO
VLNA – 0,5 dB N/F ( G4DDK kit or Down East Microwave W5LUA kit)
SSPA – 100W ( Spectran, Andrew UMTS units ) Nokia 350W etc.
Dish – 2,5m or bigger
Dish tracking – OE5JFL ideal solution, F1EHN more sophisticate system
minimum 1° el and azimuth
Good QRG stability and good QRG readout
Approximately 75 active stations now, many big guns for first tests
Technical Seminar Zieleniec 2014
TRV EME pedition requests
Cross band traffic RX / TX on different bands without manual switching
Good linearity for SSB
Minimum RF 50 W as a SSPA driver with 20m of coaxial cable
Internal power supply ( input 100 – 245V – output 28V/10A)
Minimum connecting cables between units on the table (special on EME pedition)
Internal sequencer
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Cross Band traffic – PLL LO
Cross Band TX / RX separately
High QRG stability (JT65C) and QRG
accuracy
Immediate locking of QRG after TX/RX
switch
Only one existing carrier on the Band
PLL LO kit N5AC + GPS, Rubidium
normal or HQ TCXO 10 MHz
Technical Seminar Zieleniec 2014
Clear carrier
LO 10875,000 MHz EU band
Span 180 MHz
Technical Seminar Zieleniec 2014
TRV
Wide band of TRV hairpin filters ( cover
2302 – 2424 MHz = 122 MHz broadband !!!
Enough conversion gain (18 – 20 dB )
Minimum RF out +15dBm
Easy build, minimum special requests, low
noise GaAs MMICs
Down East Microwave solution as a kit.
Technical Seminar Zieleniec 2014
Filters
Max. Bandwidth 6 MHz for -3dB
LO rejection in the filter
Switching between bands and RX/TX exchange
Technical Seminar Zieleniec 2014
Sequencer
Switching in sequence periods TRV – PA – Relay – VLNA and back
Possible switch to ground or with +15V DC out
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SSPA – 80W RF out
Simplicity
Spectran UMTS module
Good cooling
Measuring SWR
SWR protection trough circulator
Technical Seminar Zieleniec 2014
TRV mechanical solution
Modularity
Easy build – easy maintenance
Good looking design
Picture without board of filters
Technical Seminar Zieleniec 2014
Technical Seminar Zieleniec 2014
Technical Seminar Zieleniec 2014
OK1DFC setup
At Home – 10m dish and 500W SSPA
At Portable 3,2m dish and 250W SSPA
QRV as E77DX, IS0/OK5EME, OM/OK1DFC, SP/OK5EME
Smallest station worked
H44HP – 150W 76el Yagi
6W/PE1L – 200W 76el Yagi
Technical Seminar Zieleniec 2014
Thank you for attention !!!
See you via Moon
More details you can find on www.ok1dfc.com
Technical Seminar Zieleniec 2014