Over the last decade or so, Rob Sherwood's extensive work on receiver
performance has done much to improve the receivers in modern rigs, but
transmitters have been sadly neglected.
A month or so ago I began work on a project to compare ARRL test data
for selected rigs, focusing on the trash they generate. I shared an
early version of that work on the Elecraft reflector, and it seems to
have found it's way to Yaesu, who has just put new firmware on their
website to improve the CW waveform.
I've done a lot of work on the piece since then, and it's near its final
form. If you're thinking about buying a new rig, it should give lots of
food for thought. As I read FCC Rules, this report shows that an
operator using many modern rigs would be in violation of 97.307 (a) and
(b).
http://k9yc.com/TXNoise.pdf
Also, if you haven't already done so, see the slides for K6XX's
excellent presentation on Signal Cleanliness, which, among other things,
shows how we can set up and operate our existing rigs to produce a
cleaner signal.
k9yc.com/K6XXAmpTalk.pdf
73, Jim K9YC
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