I agree.....
RFI is the cause of most of the keying problems. I'm surprised that there
aren't more issues with computers operating in an RF rich environment
In CT/DOS RFI in the computer usually resulted in a complete lock-up....
W/L under Windows has more subtle problems with RFI. Generally the DOT/DASH
ratios are affected to some degree. I've experienced keying that "didn't
sound quite right" to DASHES equal in length to DOTS.
Before I tear the computer apart, I eliminate all RF.
Turn off the AMP., attach a shielded dummy load, turn the drive all the way
down. If that doesn't work, turn off the transmitter and attach a code
oscillator to the keying line.
If you still have a problem, then I would look to a software solution.
Curing RFI is a long process of elimination. Adding an external keyer might
help with the immediate problem, but the next RFI symptom could be a trashed
contest file.
Good luck,
Jim
> Going to the external keyer can mask the basic issue although may give
some
> what better keying.
>
> If the root cause IS RFI, the keyer lets you think the problem is gone,
but
> one might start to see other subtle problems which the user may or not
> associate with the original observation of poor keying.
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