[ARC5] "Curing Chirp in Command Transmitters"
Bill Cromwell
wrcromwell at gmail.com
Sun Oct 5 10:46:46 EDT 2014
Hi,
Whooping, yooping, and drooping are very poor practice. That musical
fifth will qrm other qso's in progress as will more serious, slower
drift. On the other hand having some "character" can help us sort out
the signals in a busy band because they stand out. Some of the old
timers like to talk about filters and lack thereof in their old novice
receivers (as if that was a good thing). They like to infer that it was
their own personal skill alone (as novices?) that enabled them to copy
those signals. Most of that was the individual character of the various
transmitters and fists that were on the air. That won't work with
today's myriad sterile signals.
When we go into a crowded restaurant we can converse with others there
in spite of all the other voices filling the air around us. We can hear
them all at the same time. The only way we can converse with just one
and ignore all the rest is that each and every voice is a little
different from each and every other. So don't sweat a little bit of
chirp or other "character" artifacts. A little bit of common sense will
tell us what is 'character' and what is from a lid. Looking at one of
the new spectrum displays - a waterfall - we can see some of the
differences. It doesn't take a lot of difference from a 'sterile' signal
to get some character.
73,
Bill KU8H
On 10/05/2014 10:19 AM, J Mcvey via ARC5 wrote:
> I'm curious as to the EXTENT of the chirp. I have heard some rigs on the air ( not sure what they are) that chirp with a slur up a full musical 5th with every stroke! Whoooooop whoop whooooop... It annoys me to the point of spinning the big knob. I will attempt to minimize it.
> Maybe it's because I'm new to CW, but large pitch changes bug me.
> Since ARC-5's were so widespread in WWII,it would surprise me if this was a normal operating condition for these.
> However, the original keying arrangement keys ALL B+ to the transmitter aasssemly via K52 , so the oscillator may take a few milliseconds to settle down. There is no screen regulation used in CW mode either.
> It's a rather unusual way to do things by "modern" standards, so I suspect that it will also sound different in some way, I just don't want too much "whooping"
>
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