Ryan, Ahhhh, Your problem is likely not the Station Control Module. I'm just guessing, but I'd say JU401 needs installed on the exciter.
This circuit is sort-of a loop back - meaning PTT cannot occur on the exciter unless Keyed A+ is delivered to the exciter, and brought back to the SCM, where it is used to create Keyed A-. This is done so the exciter will not transmit until the channel element has had time to be enabled and become stable. Keyed A+ is either run through the PL encoder (which someone my have removed) or through JU401 if the encoder is absent. See if the jumper has been cut or removed on the exciter. If so, replace it or install a PL encoder board. Kevin > Hi Kevin and group, > I get PTT on pin 9 and 10. before i replace parts the manual says about Q8 > and a CR5 as problems any thoughts ? > > Ryan n3ssl > > --- In [email protected], Kevin Custer <kug...@...> wrote: > >> n3ssl wrote: >> >>> Hi Group, >>> >>> I have a Vhf Micor unified station that was modfied prior to ownership. The >>> Mods for the Station control module were performed as on the RB site. The >>> problem I am having is there is no PTT on pin 5 of the back plane. Is there >>> something i should check ? The Station control module is the TLN 4635 >>> >>> Ryan n3ssl >>> >> Ryan, >> >> Can you PTT from any of the other inputs? >> >> Kevin
