[Elecraft] K3 Mic Gain vs ALC

[Ken K3IU]

I have to echo what Paul says. This must be rig specific.

I don't have the elegant equipment he describes, but taking the output 
of the K3 to a dummy load (50.1 + j0) and looking at it on an old HP 
1740A scope, I see no overshoot on either CW or on SSB using an Elecraft 
Proset plugged into the rear connection; CONFIG:r:L BIAS, AF Gain set 
for ALC indication of 4-5, CMP settings between zero & 30. At any power 
setting I select I get the same result.In SSB, a brief whistle produces 
the commanded power display on the scope with no overshoot.

73,
Ken K3IU

Paul Christensen wrote:
>> Not only SSB. I have overshoot on CW.
>
> This problem appears to be rig-specific.  I just duplicated his test 
> using three wattmeters in series, together with a Bird 4273 RF 
> sample.  The sample feeds a Tektronix SC504 oscilloscope.  My 
> wattmeters are the Alpha 4510, LP-100, and Array PowerMaster.  With 
> the K3 set to 22 watts from the menu, keyer to 30 WPM, I then sent a 
> single "dit" on 40M CW into a 50-ohm Bird TermaLine load.
>
> Observation:  I waited 30 seconds for the ALC to stabilize between 
> each successive "dit."  All three wattmeters read between 22-23 watts 
> in peak mode.  The oscilloscope showed no overshoot whatsoever.  I 
> have no mic to plug into the K3 at the moment, so no SSB overshoot 
> testing was performed.
>
> Paul, W9AC
>
>
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