Ralph McClintock wrote:
I finally hooked up my computer keying circuit, 2N2222 off the parallel port,
to my K2 before the CQWW contest. I have noticed what appears to be a
significant difference in the keying characteristic from the computer versus
the keying from the Bencher key. The computer appears to have a significantly
harder characteristic than the Bencher. This is observed in the sidetone as I
have not checked it with a 2nd receiver. Has anyone else noticed this
phenomenon?
By 'harder' do you mean that the rise/fall time of the pulses is shorter? This
is the usual meaning of 'hard' keying. To check it, you need to look at the RF
output on a scope or listen with an external receiver set to a very wide
bandwidth. I suppose the sidetone could seem harder as well, and could also be
checked on a scope. I think this is unlikely, though of course possible.
However, I suspect that you mean that the duration of the pulses is shorter;
that is, the dot/space ratio is lower. This is certainly possible. The
internal keyer has an adjustable dot/space ratio (from 0.9:1 to 1.2:1 I think).
The logging program that generates the computer CW is also probably
adjustable, so if the keying sounds too 'light' you can increase the weighting
(another word for dot/space ratio).
So, is the problem in the realm of hard/soft or light/heavy?
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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