[Elecraft] K2/100 current consumption problem

[W3FPR - Don Wilhelm]

Fraser,

Not a mod, but an alignment may have been overlooked.
The K2 bandpass filter is shared between 160 and 80 meters, so it often must
be adjusted to a compromise setting to balance between the two bands.
Adjust the bandpass filter for a peak on 160 meters, and then adjust it for
a peak on 80 meters and observe how much difference there is.  Then
initially set it to a mid-point and then if desired 'tweak' it a bit to
achieve the best balance on both bands.

73,
Don W3FPR

> -----Original Message-----
>
> 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
>