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Help wiring a echo board


The echo board probably has two sets of shielded audio wires, then a positive and negative wire. One set of audio wires are the input. They connect to the mic connector on the inside of the radio. Go to CB tricks for mic wiring info Ranger RCI-2950 Service Manual
to establish the pins you need to work with. The output set of shielded wires go either the cicuit board as you see here at :39 into the video
Ranger RCI-2950DX with TRBX3 Echo Slider and Talkback - YouTube
or you can connect them to the two wires you disconnect from the mic plug.

3's
 

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