Is there a compiled list available somewhere of recent radio models known
to produce key clicks? Many of us may be using such radios, unaware that
we are producing clicks because no one has taken the time to tell us so in
a contest. Also, such a list would be helpful in choosing between radios
when it comes time to purchase a new one. It also might shame
manufacturers into cleaning up their CW transmit. I would definitely love
to see such a list.
73 John AF5CC
On Sun, Nov 15, 2020 at 3:22 PM Jim Brown <k9yc@audiosystemsgroup.com>
wrote:
> On 11/15/2020 11:11 AM, Kenneth Wolff wrote:
> > I was surprised that Jim put part of my private message out to
> > CQ-Contest. I've learned my lesson and won't embrace the YC tar baby
> > <https://www.merriam-webster.com/dictionary/tar%20baby> again.
>
> Why would you not want your post on this topic to be public?
>
> Jukka's
> > measurements are entirely correct. Message content and keying speed
> > affect the clicks in addition to the shape of the CW envelope.
>
> Jukka's measurements were of a relatively clean radio compared to the
> dirtier ICOM and Yaesu models. For those dirtier rigs, keying wave-shape
> will be more significant.
>
> Also, the average power in the sidebands is not what matters, it is the
> peak power (i.e., the transients) that causes the QRM.
>
> 73, Jim K9YC
>
>
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