Hi, "Squelched discriminator" is a paradox of terms! Most of the time the squelch function is derived from the noise seen at the discriminator. I suspect you really mean either filtered (deemphasized) or unfiltered gated audio and/or COS. On a Kenwood redio I had a similar requirement. I used the NHRC squelch board:
http://www.nhrc.net/nhrc-squelch/ I tapped into raw discrimator audio from the Kenwood and with this board and was able to generate squelch logic that can generate either COS or use the logic to gate audio. Am I to assume you are trying to use this 2800 as a remote base? Is that correct? If so all you really need is COS, PL squelch (if desired) and either discrimator audio or deemphasized audio (line audio) to go into the controller. Normally, if you use COS input to a repeater controller you do not need to "gate" the RX audio. Some times this can end up being an art. More specific information is needed for your application and and I am sure some body can help... 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, "wb7cjq" <[EMAIL PROTECTED]> wrote: > > Does anybody know where to pick-off the "squelched discriminator" > audio, the line level audio input and the COS signals ??? > > The schematic shows J309 that appears to have some of this stuff, but > the connector is "itty-bitty" - I can't find a mating connector > anywhere !!! > > I opened the radio this morning and just went "sigh"... MilSpec, and > I'm not very interested in completely tearing the radio apart to get > to needed signals. I suspect that most (if not all) of them are on > the PCB that you see when you pull the lid. > > I went in with a tiny multimeter probe and touched a pin going to the > front panel (in search of the COS - AKA "Busy" line) and mnaged to > touch two tiny pins at the sametime. POOF! No more radio. Thank > God for warranties. My 60 year old 'fat fingers' are too 'fat' for > this micro type work, and I'm a skinny guy! > > Hope somebody has already chased these signals and can post the > info. !!! > > Thanks, > > Dave > WB7CJQ >
