Becker AR4201 - Page 2

instructions for all other aspects of the installation, such as the antenna connections and the mechanical
mounting.
The speaker or audio (headphones), or both may be used. If the speaker and audio are connected, a
switch should be installed on the speaker (+) wire so that the speaker can be switched off if headphones
are being used.
If a wire is not used, such as the speaker, audio, music, ICS, or light wires, cap and stow each conductor.
The customer must provide audio and mic jacks when used. Suggest Switchcraft, #11 audio jack, and
S12B mic jack, or equivalent.
When installing the mic or audio jacks on a conductive surface, fiber isolation washers MUST be used.
Drill a 7/16" hole to allow the shoulder of the black washer to seat and push the mic jack through its hole.
Place the brown fiber washer and thin metal washer over the threads and tighten the nut. Suggest
Switchcraft, S1028 (brown), and S1029 (black) isolation washers or equivalent.
The white nylon washers MUST be used when installing the music jack on a conductive surface. Drill a
5/16" hole and fit the shoulder of the white, shouldered, washer into the hole. Insert the music jack
through the shoulder washer and place the white, flat washer over the threads and tighten the knurled
nut.
Verify correct connections of power and ground wires. Engage the circuit breaker and turn on the radio.
Program the radio as per the manufacturer's instructions and ensure that any desired options are
activated at this time.
Tune the radio to any desired frequency and listen for incoming signals, on the speaker and/or
headphones. Plug a hand mic or boom mic into the mic jack and check that a clear voice signal is
transmitted. Any aircraft band radio can be used when making these checks, such as a handheld or the
radio in another aircraft.
Plug a music source, such as an iPod, into the music jack. Check for clarity and volume.
*NEVER attempt to transmit without the antenna connected to a com radio. The transmitter WILL be
damaged. *
Fly and enjoy!