Gregg,

That definitely sounds like your KPA100 is oscillating. Do not allow it to do that for more than a few seconds because the oscillation can cause the demise several components.

Has your KPA100 been upgraded with the KPA100UPKT? Alternately, is this a new KPA100 that was shipped in the last 2 months of last year?

If the answer to both those questions is 'NO', then I strongly recommend that you add the KPA100UPKT as the first order of business.

If the answer to either question is "YES", then please physically inspect KPA100 C31 - if it is not a .22 uF capacitor, then obtain the proper .22 uf capacitor from [EMAIL PROTECTED] and replace it.

73,
Don W3FPR

[EMAIL PROTECTED] wrote:
I am current operating /KH6 and my K2 has developed a problem (it was working 
fine.) I am using a K2/100 with the KAT100 tuner. The problem only occurs on 
high power.

The KAT100 tunes the antenna to a near 1:1 swr on all bands. Key down all is 
OK, on key up the swr jumps to a very high level, this occurs on all bands. I 
am guessing the KPA100 is going spurious on key up.

Any ideas on where to look for the problem, other than generally in the KPA 100?
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