[Elecraft] KPA500 Heat Expansion Pop

[Joe Word]

This is what I know at this point. Based on comments on this board and
private emails, this is a common issue, I would think a good many
people that don't think they have the issue just don't hear it due to
hearing loss or head phone use. It happens with both factory made and
kits.

I tried to resolve mine by loosening the top panel screws (so not
torqued), but no help.
I loosened the transformer bolt and re-tighten it (it was tight to
start with), but no help.

Could this be from the heat sensing device that triggers the fan?

Joe  N9VX

On Thu, Dec 8, 2011 at 12:37 PM, Joe Word <joe.n9vx at gmail.com> wrote:
> 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