Jeff - If you have a TSU6/KQT8 CTCSS decoder installed you can get an active high from the foil side pin 4 marked as "SDO" in the service manual(assuming you have one).....dan n2aym
--- In Repeater-Builder@yahoogroups.com, "jkstrsn" <[EMAIL PROTECTED]> wrote: > > I have a TM-431A which I want to use as a half-duplex link. I can > easily get audio in and output, but I'm stumped on how to get a > voltage change when the squelch opens for COS (Carrier-operated-squelch) > > Ideally I'd like a voltage that swings only when the CTCSS is detected > as well as squelch open, but I'd settle for one that is just the > squelch. > > My controller is an ICS linker. > > Does anyone know the proper point to connect to, or does anyone have a > service manual for this unit? > > Thanks, > > Jeff WB0LRX >
