You can't. In fact, I know of no electronic instrument capable of
reasonably detecting it. Sometimes the ear is the best judge. The keyed
waveform oscilloscope display has no association with frequency shift.
-Paul, W9AC
----- Original Message -----
From: "Steve Ellington" <n4lq@iglou.com>
To: <tentec@contesting.com>; "Duane A Calvin" <ac5aa@juno.com>
Sent: Tuesday, January 29, 2002 18:12 PM
Subject: Re: [TenTec] Fwd: Topband: More About Clix
> Since you brought it up;
> Is there any test equipment that would show "microchirp"? It's easy to
hear
> but how about viewing it on a scope?
> Steve Ellington
> N4LQ
>
> ----- Original Message -----
> From: "Duane A Calvin" <ac5aa@juno.com>
> To: <tentec@contesting.com>
> Sent: Tuesday, January 29, 2002 12:21 PM
> Subject: Re: [TenTec] Fwd: Topband: More About Clix
>
>
> > Hmmm.... This doesn't match the ARRL/QST Labs results as printed in
> > their review of the VI+. The keying waveshape was textbook perfect. In
> > monitoring my own signal both in my shack and at a friend's QTH about 10
> > miles away, there are no discernable clicks. (Yes there is the
> > microchirp, which I consider a minor annoyance.) So, has something
> > changed, or what's the real story?
> >
> > 73, Duane
> >
> > On Tue, 29 Jan 2002 09:29:45 -0600 Ron Feutz <feutz@wctc.net> writes:
> > > How about this, guys?
> > >
> > > I have always been under the impression that my signal was clean and
> > > the
> > > Yaesu guys were screwing up the bands.
> > >
> > > Ron - WA9IRV Omni 6+
> > >
> > >
> > > >To: topband@contesting.com
> > > >X-Mailer: Juno 5.0.33
> > > >From: k6se@juno.com
> > > >Subject: Topband: More About Clix
> > > >Sender: topband-admin@contesting.com
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To: <tentec@contesting.com>
> > > >Date: Mon, 28 Jan 2002 14:41:16 -0800
> > > >
> > > >Virtually all of today's modern rigs have a key click problem. The
> > > stock
> > > >FT-1000MP and Mk V CW signal rise time is 2.4 ms and the fall time
> > > is 1.0
> > > >ms. This is on every dit and dah. The ARRL criteria for "clean"
> > > keying
> > > >is a rise and fall time of 5.0 ms. After the INRAD keying
> > > improvment
> > > >mod, the rise time is 4 ms and the fall time is 2.2 ms. It
> > > certainly
> > > >improves the keying, but not enough, which is why I'm going to do
> > > the
> > > >W8JI key click mod on my MP.
> > > >
> > > >A friend has an IC-756 PRO which has clicks extending out at least
> > > +/- 1
> > > >kHz. Another has a late-model IC-775DSP which has clicks as bad or
> > > worse
> > > >than the FT-1000MP. Additionally, you can hear a "thump" on his
> > > first
> > > >dit or dah when he is operating split. Earlier model 775s have
> > > the
> > > >additional problem of generating a signal from the receive VFO
> > > when
> > > >operating split (becoming worse as the split frequency is smaller),
> > > >clearly an FCC violation. Icom knows about this problem because
> > > they
> > > >will upgrade the early version if the owner complains, but they
> > > won't
> > > >publicly confirm this problem.
> > > >
> > > >Many topbanders prefer the Omni VI+ because of its superior QSK
> > > and
> > > >excellent receiver. But even it has bad clicks. INRAD has thus
> > > far
> > > >unsuccessfully tried to develop a mod to correct this. George,
> > > W2UVG
> > > >(owner of INRAD) told me, "I have spent many hours working on the
> > > Omni
> > > >VI+ keying and ALC loop as it has a similar problem. The keying
> > > waveform
> > > >out of the first mixer is text book perfect, 5 mS up and down.
> > > Then it
> > > >goes through the ALC loop and the output has 1 mS rise time and 5
> > > mS fall
> > > >time. This loop has a very slow decay time, and it doesn't change
> > > the
> > > >input shape. If I disable the ALC loop the radio puts out 100
> > > watts and
> > > >the keying is perfect. But there is no power control, etc."
> > > >
> > > >Jim, N7JW has overcome the Omni VI+ click problem by using an
> > > FT-1000MP
> > > >with the W8JI key click mod to transmit and an Omni VI+ to receive.
> > > It
> > > >would be nice if all hams (especially topband contesters) were as
> > > >concerned about having a clean CW signal as N7JW is.
> > > >
> > > >I'm not sure how the modern Kenwood radios are as far as clicks
> > > go.
> > > >
> > > >73, de Earl, K6SE
> > > >_______________________________________________
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> > >
> > >
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> > >
> >
> >
> > Duane Calvin, AC5AA
> > Austin, Texas
> > _______________________________________________
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> >
>
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