[Elecraft] K3 FM issues

[Julian, G4ILO]

W8ZN wrote:
> 
> Would compression really sound OK on FM?? Having the compressor on using a
> IC706 on FM was horrible for audio. I remember a discussion about this
> some time ago and a question of if there was really 5 khz deviation. I use
> my K3 on 6m FM and havn't had any complaints. 
> 
Limiting is normally used on FM, rather than compression. Basically the
audio peaks are clipped, followed by a steep low pass filter that eliminates
the harmonics. It's just a way to keep the talk power up.

Over here, unfortunately, we have adopted a 12.5KHz channeling which means
that the maximum deviation you can use is about 4KHz. Some repeaters will
cut you off if you use any more than that. So some way of boosting the
average talk power is really necessary. 

Because of the low deviation I find FM a really hard mode to copy these
days. The only people with decent audio are those with old rigs with the
deviation still set up for 25KHz channeling.

-----
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Blog    http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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