CI
RCU
IT
BR
E
A
K
E
R
18
19
20
1
17
21
8
22
23
24
25
7
2
10
9
6
3
14
5
4
13
11
12
16
15
PT
T
7
PIL
O
T
MIC
7
2
13
9
HD
P
H
PTT
6
CO
-P
IL
OT
HD
P
H
MI
C
MIC
13
HD
P
H
HD
P
H
MI
C
MIC
13
HD
P
H
HD
P
H
MI
C
11
13
16
14
13
P
ASSE
N
G
ER
S
11
15
4
11
11
11
13
6
3
PO
WER
12
-2
8
V
1A
M
P
A
V
IO
NICS
G
R
O
UND
TR
A
N
S
M
IT
KEY
L
IN
E
RE
CE
IV
E
A
UDIO
T
R
AN
SM
IT
AU
D
IO
IC
S
Isolat
e
F
L
IG
HT
CO
M
4
0
3
Sq
Vo
l
IC
S
S
q
u
e
lc
h
V
ol
um
e
Is
ol
at
e
403
IN
T
E
RC
O
M
Op
ti
ona
l
SM
AL
L
P
a
ne
l
FLI
G
HTCO
M
4
0
3
In
te
rc
o
m
MIC
HD
P
H
CO
NN
E
C
T
IO
N
S
T
O
E
X
IS
T
ING
JA
C
K
S
A
IRCR
AF
T
R
AD
IO
Rear view (Solder Terminal Side)
of 25 pin D-sub plug (male Pins)
13
25
14
1
TI
P
RING
BA
R
R
E
L
NOTES: Auxiliary input is pin no.18.
Isolate all mic
jacks from airframe.
Figure 8
- Connection Schematic - Mono Mode
6