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
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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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