[Elecraft] Looking for some more "Punch" on SSB and No Hi Cur on 30 M

[Vic Rosenthal]

Gottlieb, Jonathan wrote:
> I've got k2/100 #4856.  I've done the C80, C81 mod.  Everything
> checks out great, except I still get Hi Cur on 30 M and it doesn't
> seem very robust on 20 or 17 SSB.  80 and 40 M SSB output is
> fantastic, often peaking right at 100 watts.  I get 100 W in CW key
> down on all bands except for 30 M where I get the Hi Cur display.
> Any thoughts or ideas on how to fix the Hi Cur on 30 and the less
> than robust SSB output on 20 and 17?

If you get 10 watts output when the K2 is in QRP mode with a reasonable 
current draw (less than 3 amps), then you might have resistors at R80-81 
in the KPA100 that are too inductive.  In a private email, I was told by 
one person who had a similar problem that he got good results by 
replacing these resistors with Vishay BC 1.6 ohm, 2W, 5%, metal film 
resistors (Mouser Cat No. 594-5083NW1R600J; Vishay P/N 
5093NW1R600J12AFX) that are known to have lower inductance.  I haven't 
tried this personally.  I suggest corresponding with Gary at Elecraft 
about your problem.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco