[Elecraft] Temperature with KPA100 and XV144

[Geoffrey Mackenzie-Kennedy]

Hi Gerhard,

Not an answer I'm afraid, but I recently opened up my KPA100 to try to find
the whole answer to the low power out problem. Even though my KPA100 puts
out 100w on all bands, I don't like something lurking ready to bite! I
immediately noticed that smell as though something had been hot at sometime,
and as far as I can tell (sniff) some resistor(s) around T1 was (were) the
cause. No visible sign of overheating, and values OK. T1 is OK, the
transistors are healthy, the fan runs all the time when power demand is over
11W, and in a pileup the heatsink does get warm but not hot.

Sorry I do not have a XV144.

73,
Geoff.
GM4ESD

----- Original Message ----- 
From: "GS" <gerhardschwanz at yahoo.de>
To: "Mailingliste Elecraft" <elecraft at mailman.qth.net>
Sent: Monday, July 04, 2005 8:08 AM
Subject: [Elecraft] Temperature with KPA100 and XV144


> Hi list,
>
> I have run into some minor problems regarding
> temperature rises with the mentioned devices and like
> your opinion/solution.
>
> 1st, the KPA100. I noticed that even when I only
> answer some CQs in a contest (CW) the fins get very
> hot - of course the little fan fights it. Not to speak
> of CQing myself. This is only possible with another
> fan on top. (I admit that I didn't dare not using this
> additional fan).
>