[Elecraft] K3 - CW Sidetone

[Vic K2VCO]

Mike Harris wrote:
> G'day,
> 
> Has anyone else noticed a slight chuffing of the CW sidetone when in QSK 
> mode.  The chuffing is absent when in manual TX.  I guess it's probably 
> the change over from band noise to sidetone.  Nevertheless it sounds odd.

Mike,

Try reducing the audio gain a bit or increasing the sidetone level and 
see if that reduces the phenomenon. If so, I believe it is exactly what 
you say, the change-over, etc. I notice the same thing, and have viewed 
the audio on a scope looking for artifacts and haven't found any.

There's a similar problem when there are a lot of signals in the 
passband. I think it's because the QSK is *too* good -- very fast, and 
the sidetone is shaped to match the RF output.

Wayne has talked about making some sidetone characteristics adjustable 
to make it easier to monitor in noisy or crowded conditions. This is 
probably not going to happen tomorrow, though!
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco