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

[EricJ]

Well, sidetone and the tone generated from offset is not
transmitted...except into your head via the ear canal which has excess audio
bandwidth when listening to CW.

Eric
KE6US
www.ke6us.com

-----Original Message-----
From: Nick Waterman [mailto:laptop at noseynick.com] 
Sent: Wednesday, January 04, 2006 3:10 PM
To: Vic K2VCO
Cc: EricJ; elecraft at mailman.qth.net
Subject: Re: [Elecraft] Side Tone (Choosing the right "music")

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?