[Elecraft] Side Tone (Choosing the right "music")

[Nick Waterman]

Vic K2VCO wrote:
> Not harsh, but boring.  But anyway, the reason a pure sine wave is
> desirable is that it makes matching pitch with a received signal easier.

Well, and bandwidth. A pure sine wave uses, errr, almost zero
bandwidth*, whereas one with harmonics needs somewhere to put those. A
500Hz sine wave at 7100kHz is really a sine at 7100.5, whereas a 500Hz
sine wave with harmonics at 1000 and 1500 kHz is now using 7100.5, 7101,
7101.5...

... or am I preaching to the choir here?

* Yeah, yeah, ok, not quite true as soon as you start modulating it with
keying envelopes.

-- 
"Nosey" Nick Waterman, G7RZQ, k2 #5209.
#include <stddisclaimer>    sig at noseynick.net
It is ten o'clock; do you know where your processes are?