[Repeater-Builder] MAxtrac Help please

[w7nikw7nik]

Has anyone  rewired the pin out on a Motorola DTMF mic model hmn3013a   to a 
maxtrac 300 . I do not see voltage out the mic jack , this might be a problem . 
Any help would be great 
I can get different dtmf mic , but i don't know what model to get .