Re: K2/100 current consumption problem

Posted by Stewart Baker on
URL: http://elecraft.85.s1.nabble.com/K2-100-current-consumption-problem-tp375119p375128.html

Fraser,

Just checked my K2/100 setup. For 100w it draws 20Amps, so something is wrong.
I would check the KPA100 160m low pass filter components. If you have access to
an antenna analyser such as a MFJ then use that with the dummy load.
If not use a signal generator along with your scope.

73
Stewart G3RXQ

On Tue, 01 Mar 2005 14:19:42 +0000, Fraser Robertson wrote:

> I've just noticed that our club's K2/100 (#3764) draws excessive current on
>
> topband.
>
> Going through the bands my own K2/100 (#4368) draws between approx. 15-19A
> at full power setting, (circa 100W o/p).  The club rig draws between approx.
> 16-20A in the same test, but on topband the current consumption is 27A !!
>
> I did not build the clubs rig, but the ham who built it has built several
> K2's.
>
> Both rigs have the latest mods/screening/upgrades, including the PA
> instability fix for 80m.  There does not appear to be any instability on
> topband - I've checked on a scope and spectrum analyser.
>
> It's possible the club's PA missed out on a mod early in it's life?
>
> Any ideas please?  Looks like it's short of some L or C somewhere.
>
> Thanks, Fraser G4BJM
>
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