--- In Repeater-Builder@yahoogroups.com, "dallasreact112" <[EMAIL PROTECTED]> wrote: > > 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" <wb7cjq@> 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 > > > Hi Bernie!
Yeah, bad choice of words. What I really meant was gated discriminator audio so that I don't have to build up a transistor switch to mute the audio upon loss oc signal. I had to do that years ago with an old Standard that I built into a repeater. UGH... Anyway, I see a 2SJ144 hanging between the volume pot and the audio amp., one side tied to ground. I'll bet this is the guy I'm after, but I can't get at it! Too tiny for me !!! Yes, this package is essentially a remote base, crossbanding between 2 meters and 440MHz. Thanks for the reply and the info.! Dave.
