Barry,
Are these fast QSK audio clicks on key up the default behavior for Omni VI
rigs? I was thinking something could be wrong with this Omni in fast QSK.
Tnx for letting me know.
I have no prior experience with Omnis. The one given to me is the only one
I ever used. Slow QSK is working very nicely indeed, and I am quite pleased
with the rig.
73
Gerd.
2016-11-21 20:03 GMT+01:00 Barry N1EU <barry.n1eu@gmail.com>:
> I always use slow QSK with connector 52 removed and am VERY happy. I
> suspect alleviating the audio clicks in fast QSK might be quite a
> challenging task.
>
> 73, Barry N1EU
>
> On Mon, Nov 21, 2016 at 1:22 PM, gerd Groos <df9ts.cw@gmail.com> wrote:
>
> > Hello,
> > I friend borrowed me an Omni VI, which is producing very disturbing
> > audio-clicks in fast QSK mode, at any CW speeds, even with very slow
> > keying.
> >
> > The clicks are louder than the received signal and quite distracting.
> >
> > I am including symptoms below for those who want to read on. Any ideas,
> and
> > suggestions highly welcome.
> >
> > 73
> >
> > Gerd DF9TS.
> >
> > ===
> >
> > The TRX is click-free when connected to a dummy load. Symptoms appear
> with
> > antenna signal (or white noise) on the receiver input.
> >
> > The clicks are produced in fast QSK only on key release ("key up") only.
> > "Key down" is not producing clicks.
> > TX signal is ok and click-less and without chirp (as verified with 2nd
> > receiver). RX audio signal is with these clicks.
> >
> > I verified the "TD". "T" and "R" signals generated for internal tx/rx
> > switching with a scope. They look similar to a quick Spice simulation I
> did
> > of the circuit. I did however not see a lag between "T" going down and
> "R"
> > going up.
> >
> > Slow QSK is without such clicks.
> >
> > On "slow QSK" the RX audio comes back up slowly on "key up".
> > On "fast QSK" the RX audio comes back immediately on "key up".
> >
> > This makes me wonder if the cause is a timing issue on "key up".
> >
> > I did align the TRX following the manual, twice. BFO is well aligned
> also.
> > The rig behaves as expected. Sensitivity and filters ok.
> >
> > Removing connector 52, extensively discussed in this list, makes no
> > difference for this OMNI VI´s clicking.
> >
> > The clicks are present on Loudspeaker as well as on "Audio Out" cinch
> > socket.
> >
> > Tnx for reading this far ;-)
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> >
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