Sigtronics SPE-4 - Manual (Page 2)

WIRING INSTRUCTIONS
‘Figure 3 is a schematic illustration of the TRANSCOM
wiring connections to be made to the aircraft.
A Table is also presented in Fig. 3 which outlines the
connector pin numbers, along with the function, color and
destination of each wire in the cable. It is important to
note that the orange and yellow wires must be connected
to the corresponding push-to-talk switches as shown,
because of the “opposite side disable” feature. In
addition, if the aircraft already has a push-to-talk switch
hard wired to the mike input jack, it must be disconnected
from that mike input jack and connected, as shown in Fig.
3 to the orange wire. When wiring is completed, tape or
otherwise insulate metal parts on connector plug to
prevent their contact with other aircraft electrical
equipment.
NOTE: Care should be taken to verify that the aircraft
radio wiring conforms to the standard color code.
NOTE: A small, square, white or gray trimmer potentiometer is
provided inside the unit for adjusting the mike input level to the
radio. In the event of overmodulation or reports of weak trans-
missions, an appropriate adjustment can be made. Clockwise
rotation of the screwdriver adjustment increases the mike
output level.
* Cable length to be determined
upon installation of rear
satellite box .
#22 gauge wire or larger is
recommended.
178 East Arrow Highway
••
San Dimas California 91773
••
(909) 305-9399
INSTALLATION INSTRUCTIONS: Please read the following instructions carefully so that you can
derive maximum benefit from your SIGTRONICS TRANSCOM.