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[CQ-Contest] Clicks

Subject: [CQ-Contest] Clicks
From: i4jmy@iol.it (i4jmy@iol.it)
Date: Thu Mar 8 15:00:18 2001
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I think the parameter to be measured is called TIM (Transient
Intermodulation Distortion) and surely it has an accepted method to be
evaluated as well as the IMD or THD have.

Mauri I4JMY

 > ---------- Initial message -----------
 > From    : owner-cq-contest@contesting.com
 > To      : cq-contest@contesting.com
 > Cc      :
 > Date    : Wed, 07 Mar 2001 07:51:36 -0500
 > Subject : Re: [CQ-Contest] Clicks
 > At 05:14 PM 3/6/01 -0500, Bill Fisher W4AN wrote:
 > ...I have noticed what I'll call key clicks are getting worse and
 >  >on the bands.  Normally, this phenomina can be observed when
signals are
 >  >VERY strong.  The same signal that produces clicks at 40 over S9,
 >  >appear "clean" at S9.
 > Reading this statement made me uncomfortable at the start.  If
cranking in
 > attenuator makes the clicks go away, then I would wonder whether they
 > being produced in the receiver.  I know that my TS-930, which has a
 > reputation for handling overload well, behaves exactly this way on
 > signals.  Others, however, still produce off-frequency clicks and
 > even when reduced to under S9.
 > I'm afraid that receiver-based tests are never going to persuade
 > manufacturers to clean up their act.  Why can't we contesters
persuade the
 > ARRL to add an appropriately designed test or tests to their
 > reviews?  It would be even better (but maybe utopian?) if they could
 > persuaded to run a comparison of the top half-dozen contest radios for
 > transient off-channel garbage on both CW and SSB.  W8JI's already
 > how this could be done from a technical standpoint, and the ARRL has
 > open to changing its test procedures in the past when presented with
a good
 > idea...
 > How about it, HQ?  Anyone reading the mail?
 > 73, Pete N4ZR
 > Contesting is!
 > The World Contest Station Database
 > is waiting for your input at
 > http://www.qsl.net/n4zr
 > --
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