[Elecraft] Power too high in PSK31 / SSB

Rob May roblitespeed at hotmail.com
Sat Oct 4 11:03:00 EDT 2008


Joe, W4TV, wrote:


 Running "no bars" of ALC in PSK/AFSK causes the microphone gain
 to be increased to compensate for the insufficient drive. This
 will result in added distortion (noise and IMD)."



Richard, VE3JAY, wrote:


FWIW, I leave my K3's power control set at 100 watts, but I adjust the
mic gain control to a setting which ensures I get zero ALC reading
(even one bar causes a noticeable increase in IMD as measured on a
PSKmeter)."



So, no bars equals more noise and IMD or even one bar causes more IMD?  
These two statements seem to contradict each other.  I'm thinking that the 
ALC will only limit mic gain, it won't bring it up if it's low, other wise you wouldn't 
have any dynamic range on your voice, the ALC would tend to make everything
the same level.  I'll just keep doing the way I've been doing it.  I get good 
reports and the power output that I expect.
Rob
NV5E



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