55

4

4

3

3

2

2

1

1

D D

C C

B B

A A

Title

Size Document Number Rev

Date: Sheet of

SADELTA ECHO MASTER PLUS.SCH 1.1

SADELTA ECHO MASTER PLUS

1 1Sunday, March 01, 2009

DRAWING BY: Rick Jackson Euro Radio Co

Title

Size Document Number Rev

Date: Sheet of

SADELTA ECHO MASTER PLUS.SCH 1.1

SADELTA ECHO MASTER PLUS

1 1Sunday, March 01, 2009

DRAWING BY: Rick Jackson Euro Radio Co

Title

Size Document Number Rev

Date: Sheet of

SADELTA ECHO MASTER PLUS.SCH 1.1

SADELTA ECHO MASTER PLUS

1 1Sunday, March 01, 2009

DRAWING BY: Rick Jackson Euro Radio Co

-+

6

5

BIAS

7

BIAS

14 13

12

-+

1234

5 6 7 8

-+

9

108

BIAS

-+

12

3

BIAS TO EACH OP AMP

RLA

MN3008

1

2

3

4 5

6

7

8

ROGERBEEPMIC AUDIO OUTPUT TO Radio

REDMN 3101

14

7

9 VOLTS VDD

PCB No = EMP2

SADELTA ECHO MASTER PLUS

OP-AMPS ARE LM324

RX TO Radio

TX TO Radio

VU

Euro Radio Co

9 VOLTS VSS

PINS 5, 10, 12

A

B

D

C

euroradioco.net

euroradioco.net

euroradioco.net

ACD

B

LM324

LM324

1n1n

10n10n

2u22u2

15n15n

27M27M

22K22K

5K65K6

22K22K

10n10n

10K10K

68p68p

82K82KPTT

TX

RX

PTTTX

RX

8K28K2

180K180K

100K100K

1

23 40114011

4K74K7

1K1K

470R470R

10n10n

10K10K

12K12K

10K10K

10K10K

5

64 40114011

10u10u

BC548BC548

6K86K812K12K

3n33n3

680K680K

13

1211 40114011

10u10u

PTTTX

RXPTT

TX

RX

2M22M2

5K15K1

1u1u

6K86K8

10n10n

1u1u

5K65K6

1K81K8

9

810 40114011

10u10u

10u10u

22n22n

50K50K

10K10K

6K86K8

BC548BC548

12K12K

10K10K

RLA/2

TX

RXRLA/2

TX

RX

470n470n

100n100n

RLA/1

TX

RXRLA/1

TX

RX

4K74K7

1K1K

150K150K

27K27K

5K65K6

1n1n

10n10n

BC548BC548

150K150K

ONOFF ONOFF

10n10n

100n100n

PTT

TX RX

PTT

TX RX

10K10K

270K270K

220K220K

BC548BC548

3n33n3

100n100n

470u470u

1M1M

39n39n

MICMIC

1u1u

5v15v1

820K820K

100K100K

PTT

TX

RX

PTT

TX

RX

10n10n

820K820K

8K28K2

10K10K

56p56p

ECHOECHO

120p120p

6K86K8

10M10M

5K65K6

33K33K

22K22K

68K68K

22R22R

10n10n

100K100K

100K100K

LEDLED

10n10n

1n1n