15
GRN
RED
WHT
BLK
GRN 1
RED 3
WHT
4
BLK 2
GRN 1
RED 3
WHT
4
BLK 2
AUDIO
+ DC POWER
COMMON
CONTROL
290A3744
PRIMAR
Y "A"
PRIMAR
Y "B"
SECONDAR
Y
1
3
4
5
2
1
1
3
2
2
POWER
(+)
(
-
)
1K
1W
ATT
Operating Principle:
1.
Primary normally listen to
Secondary
.
2.
Secondary talks to primary
“hands
‑fr
ee”, without having
to pr
ess a talk switch.
3.
When any Primary talks,
Secondary hears. Other
Primary will hear
.
4.
T
o talk into Primary
, pr
ess
talk switch and speak into
speaker/ micr
ophone.
Release talk switch to listen.
5.
T
o talk into hand
‑held
micr
ophone, pr
ess talk switch
on micr
ophone and speak
into micr
ophone element.
NOTES:
1.
Speaker/Micr
ophone
2.
Of
f/On/Speaker V
olume
Contr
ol
3.
Pr
ess
‑to
‑T
alk Switch
4.
#137144 Hand
‑held, noise
‑
cancelling micr
ophone with
push
‑to
‑talk switch
POWER
PRIMAR
Y
A
PRIMAR
Y
B
SECONDAR
Y
12
‑18
VDC
AD
‑26C
‑1
‑7
AD
‑26C
‑1
AD
‑26D
‑1
22
‑32
VDC
AD
‑56C
‑1
‑7
AD
‑56C
‑1
AD56D
‑1
8
