[Elecraft] KPA500 Heat Expansion Pop

[Gary Hinson]

Mine pops or clicks too.

In my case, it sounds like a relay switching.  I thought at first it was
something sensing the temperature and changing the fan speed, but the pop
doesn't (often) coincide with a change in fan speed, so I think that's a red
herring.

Another ZL told me his KPA does the same thing.

Our amps still work just fine though!

73
Gary  ZL2iFB

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> bounces at mailman.qth.net] On Behalf Of Joe Word
> Sent: Friday, 9 December 2011 6:38 a.m.
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] KPA500 Heat Expansion Pop
> 
> My KPA500 has developed a heat expansion pop. When it heats up and then
> cools down I get a pop from inside the amp. It does this now every time I
> make a SSB transmission.
> 
> Anyone else experience this? If so, any resolution?
> 
> Joe  N9VX
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