At 10/18/2008 08:56, you wrote: >At 07:32 AM 10/18/2008, John Everson wrote: > > >Good morning to the group. > > > >I have a situation where I have two repeaters and only one available > >port. Has anyone tried this? If so, what method did you use, and what > >were the results? I have done this in the past, but it was a long time > >ago, and my memory isn't what it used to be. It seemed to work, but > >back then, I may have not really have been as discriminating as I am > >today. > ><----What kind of "port" are you talking about? Antenna? Controller?
I assume he's referring to repeater controller ports. I believe you can simply tie the PTT & audio out of a single port to 2 transmitters. Just make sure the open PTT voltage of both transmitters is roughly the same. If one is 5 volts & the other is 12, the 12 volt source could damage the 5V PTT line. The receivers are a different story, as you'll need some sort of port combiner to handle the COS & CTCSS logic outputs & audio outputs from the 2 receivers. I built a 4 port unit that logically ORs all 4 COS lines & squelch gates/mixes the audio from each receiver. Unfortunately I never scanned the circuit so I'd have to rummage through my paper files if you're interested in the schematic. Bob NO6B
