[Elecraft] Power loss using K2/100

[Ken Wagner]

Hi Ed:
Check the CAL TPA procedure. I haven't got my manual right here, but the 
procedure for setting the "ambient" temp is pretty clear as I recall.
Good Luck!
73, Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 06:32 PM 7/29/03, Edward Ringel wrote:
>Hi,
>
>I'm having some difficulty with my KAT100 (we'll get to that later) but
>in the process of doing final  tune up etc I discovered a problem with
>my K2 that had not previously been noted. It appears to be a temperature
>sensitive problem:
>
>
>
>When I turn on the K2/100 after it has been off for a while, I am easily
>able to get 20W for tuning on all bands. Suddenly however I will lose
>power on several bands-output will drop to 1 watt on 20W tune, 0.1 watt
>on 2 watt tune on some bands but not others. If I cool the unit down
>(turn off, wait a while) I get power back on all bands. This occurs
>whether I am driving the ATU or a good quality dummy load (MFJ
>cantenna). The bands seem to be pretty random.
>
>
>
>Up to now, everything has checked out pretty well. All toroid pads have
>excellent conductivity. I was careful to not overheat semiconductors,
>and I used a grounding strap.
>
>
>
>Any suggestions on where to begin? I realize I will need to do some
>sleuthing, but some idea of where to start would be great.
>
>
>
>  I don't think I can tackle the KAT100 problem till I have stable output
>on the K2/100. Furthermore, if it is a controller issue, it may be
>messing up the KAT100.
>
>
>
>Thanks.
>
>
>
>Ed Ringel
>
>AA1WZ
>
>K2 #3548
>
>
>
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