There is a controller, but it isn't capable of muting the audio lines. Hence, I need to have the audio between the units be squelched audio.
Dave. --- In [email protected], "dallasreact112" <[EMAIL PROTECTED]> wrote: > > Ok Dave, > > I'm still stumped a bit why you need gated audio. Is there not a > controller? In other words, does this cross band link stay keyed all > the time? > > 73 > > Bernie Parker > > K5BP DARC Tech Officer > > --- In [email protected], "wb7cjq" <wb7cjq@> wrote: > > > > --- In [email protected], "dallasreact112" > > <dallasreact112@> 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 [email protected], "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. > > >
