01-03-2011, 10:26 AM
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Join Date: Dec 2008
Yes I'm aware but looking to make talkback for EXTERNAL speakers.
For inside radio you can use a 100 ohm but may have to play with the value up or down to get the level you desire.
Just as easy inside radio to make the talkback a variable. Connect wires to the middle tab and 1 side tab of a 500 ohm panel mount pot. Connect 1 wire to External Speaker ground and other wire to Chassis Ground like a nearby screw holding the circuit board down to the chassis. This will give you variable talkback which adjusts from full-loud all the way down to OFF.
Drill hole in rear of radio and install the panel mount pot - add a knob. Off ya go mate!