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I
built this unit to interface my computer headset to many
of my base radios. All I have to do is change the
connection cable and maybe adjust the mic level.
The box has an RJ45 connector on it for cable to radio
connection. The connection cables are wired
according to what features the radio has. If the
radio has channel up/down it's connected to the small
red/black push buttons, if it don't, it's not
connected. I also used a separate wire for receive
audio from the speaker jack from the back of the radios.
This unit has a PTT led, PTT button, channel up and
channel down buttons.
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