Wonder if any noise might be generated by the transmitter's coming up before
some loop is locked?
Talked with a friend who was running a SGC rig. It was interesting in that
the feeling I got was that his signal was much stronger than the S-8 on the
meter. S-8 on the meter was stronger than the audio sounded. He had clicks
above his signal, a secondary carrier about 700 Hz above the primary, and a
load of stuff in between.
Mike N4NT
----- Original Message -----
From: "Barry N1EU" <n1eu@yahoo.com>
To: <tentec@contesting.com>
Sent: Tuesday, November 26, 2002 5:00 PM
Subject: Re: [TenTec] CW Key Clicks and Filters
> The rampant clicks I am referring to are +/- 500-800hz
> from the fundamental and clearly audible with a xtal
> filtered receiver. They are not the artifact of the
> receiver, they are present in the xmit signal (keying
> rise/fall time too fast) of some (not all) modern
> rigs. Just tune across 40M and you'll hear some
> signals that are completely clean and some signals
> that are horrendously clicky.
>
> 73,
> Barry N1EU
>
> --- Steve Ellington <N4LQ@igLou.com> wrote:
> > Now let's tune our RX
> > to within 200hz of a strong cw signal. You will hear
> > strong clicks. Why?
> > Because they are there. That's why. No matter how
> > clean his TX is, there's
> > still clicks when you tune that close. > -----
> Original Message -----
> > From: "Barry N1EU" <n1eu@yahoo.com>
> > To: <tentec@contesting.com>
> > Sent: Tuesday, November 26, 2002 2:57 PM
> > Subject: [TenTec] CW Key Clicks and Filters
> >
> >
> > > W8JI deserves a lot of credit for drawing
> > attention to
> > > this serious problem. Clicks are a function of
> > the
> > > rise and fall time of the trasmitted waveform, and
> > > should therefore be independent of keying speed.
> > >
> > > I have to take exception to W4BQF: "I seriously
> > doubt
> > > that there were very many contest stations
> > generating
> > > key clicks during the contest as most contesters
> > are
> > > pretty knowledgeable technically."
> > >
> > > I don't know which contest is being referred to,
> > but
> > > key clicks were rampant on the bands in CQ WW and
> > > they're caused by poor transmitter design, and not
> > > poor operators or poor receivers. Some rcvr
> > filters
> > > can emphasize the clicks, but if the clicks are
> > being
> > > transmitted you're going to receive them.
> > >
> > > 73,
> > >
> > > Barry N1EU
> > > www.albany.net/~bg
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