tait700 wrote: > --- In [email protected], "ki4vdp" <ki4...@...> wrote: > >> >>Hello Chris, >>What model T-800 repeater are you working with. I should be able to help you. >>Gary > > > Thanks Gary, > > The Module is T856 UHF 400-512mhz. > I assume that the Gnd in the Mic goes to the shield on the plug but i am a > little dubious about taking a chance with the other two terminals. > This module is not mine and letting the smoke out if i get it wrong could be > a little embarrassing :-) > > Thanks for your reply, > > Regards, > > Chris S. > > >
On the schematic, the mic jack is wired: 1. gnd 2. mic in 3. ptt Can't say the ring is 2, but you can be sure by measuring the voltage on pins 2 & 3. The audio in is AC coupled and does not have any bias voltage on it. The PTT line is tied to +9V via a 10K pull up resistor. Ed Yoho W6YJ
