APX 8500 - Adding 2-wire Mic

[MerkurMan]

Hi all,

Noob question here. We normally use the RMN5054 IMPRES 3-wire mic for PTT functionality and wire it to the accessory connector as follows:

1 - Ground - White wire
17 - One Wire - Blue wire
23 - AUX Mic - Red wire

Due to supply constraints we want to use a 2-wire substitute, GMMN4065, in its place. This has a white and black wire only. Is this possible? If so, would we use pins 1 and 23 or 17 and 23?

Any help would be greatly appreciated!

Thanks,
Ryan.

 

[jeepsandradios]

The 2 wire mic is mic only. no PTT. The only way it would work is wire to mic high and ground and use PTT on hand mic to key radio.

 

[MerkurMan]

Thanks for the reply - we do have a separate hands-free switch triggering the PTT input, I'm most worried about the mic connections. So you're saying AUX Mic and Ground are the winners?

Sorry, should have included the pinout diagram in my first post...

 

[pcrjunkyamd]

is PTT triggered by a ground signal or 12v signal we are looking into add this for our police department. I can do it on a Kenwood but have not done it on a Motorola yet