D104 to Maxtrac

[scott181]

Looking at the pin out on the motorola maxtrac microphone. Looks possible, but has
anyone tried wiring an astatic D104 mic to a maxtrac for base use??? Any help would
be appreciated.
<<<Scott>>>

[Will]

The D104 has a crystal microphone element and does not work with the Motorola mobile microphone inputs.

You would have to build an amplifier to match the D104 mic to the Maxtrac mic input.

[scott181]

Ok thanks for the info. Looks like I just buy an actual motorola mic.

[jackhackett]

It depends on which stand you have with the D104, some have amplifiers in them and might work with a Maxtrac.

You'd probably want to add a capacitor in line with the audio lead, as the bias voltage from the Maxtrac might cause problems. The amplifier has a cap on it's output but I believe they are electrolytic and the positive bias from the radio could reverse polarize it. I'd go with something like a 10uF and put the positive lead towards the radio.

Of course lord knows what it would sound like.....

Schematics can be found here:

http://www.barovelli.com/projects/radio ... static.htm