5 4 3 2 1
9 VOLTS
VSS
9 VOLTS
VDD
PTT
PTT
D D
ROGER
TX
TX
RX
MIC AUDIO OUTPUT TO Radio RX
BEEP
470u OFF ON
470u OFF ON
4011
4011
4011
4011
10K
10K
PCB No. = EMP2
9 5
10K
10K
120p
120p
10 4
22R
22R
5K6
5K6
RLA/1
RLA/1
8 6
27M
27M
10u
10u
RX
RX 14 RLA
180K 5.1V
180K 5.1V
10u
10u
TX
TX 1
220K 33K
220K 33K
39n 2u2 1K
39n 2u2 1K
1u
1u 3
PTT 680K
PTT 680K
1K8
1K8
6
TX
TX 2
1n
1n
1K
1K
- 7 10n
10n
RX
RX
4011
4011
100n
100n
5 + 10K 7
10K
MIC
MIC 13
BC548
BC548
22K 100n
22K 100n
5K6
5K6
11
10K
10K
10K
10K
100n
100n
6K8 10M
6K8 10M
12
1n 4011
1n BIAS 4011
22K
22K
2M2
2M2
270K
270K
10n
10n
C C
470n
470n
100K 100K
100K 100K
1M
1M
5K6
5K6
10n
10n
3n3 100K
3n3 100K
3n3
3n3
56p
56p
68K
68K 2
8K2
8K2
6K8 27K 5K6
6K8 27K 5K6
9 4 3 2 1 1 -
4K7
4K7
12K
12K
14 - 13 8 - + 3
1u
1u
+ + 10 MN3008 1n
1n
100K
100K
OP. AMPS ARE LM324 12
1u
1u
BIAS TO EACH OP AMP
BIAS BIAS 5 6 7 8
PINS 5, 10, 12
12K 8K2
12K 8K2
ECHO
ECHO
6K8 10n
6K8 10n
Euro Radio Co
10n 10n
10n 10n
15n 10u
15n 10u
B B
RLA/2
RLA/2
1 8
RX
RX
22K
22K
82K
82K
RX
RX 2 7
820K
820K
4K7
4K7
10K
10K
10K
10K
MN 3101
820K
820K
50K
50K
12K
12K
TX
TX 3 6
10n
10n
22n
22n
PTT
PTT
6K8
6K8
RED
TX
TX
BC548
BC548
RX
RX RX TO Radio 4 5
68p
68p
BC548 BC548
BC548 BC548 TX TO Radio
PTT
PTT
10n
10n
TX
TX
10n
10n
150K
150K
VU
5K1
5K1
LED
LED
10K
10K
470R
470R
10u
10u
150K
150K
SADELTA ECHO MASTER PLUS
A A
DRAWING BY: Rick Jackson Euro Radio Co
DRAWING BY: Rick Jackson Euro Radio Co
DRAWING BY: Rick Jackson Euro Radio Co
Title
Title
Title
SADELTA ECHO MASTER PLUS
SADELTA ECHO MASTER PLUS
SADELTA ECHO MASTER PLUS
Size Document Number Rev
Size Document Number Rev
Size Document Number Rev
SADELTA ECHO MASTER PLUS.SCH A1
SADELTA ECHO MASTER PLUS.SCH A1
SADELTA ECHO MASTER PLUS.SCH A1
Date: Sunday, November 12, 2006 Sheet 1 of 1
Date: Sunday, November 12, 2006 Sheet 1 of 1
Date: Sunday, November 12, 2006 Sheet 1 of 1
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