[Elecraft] [KPA500] incredible hum from PA

[kevino z]

Nice! 
Sadly, torquing it down to the spec (it was assembled by Elecraft just under the spec, by the way) made zero difference. But your post made me smile so thank you. Haven't done that since I got the amp powered on.

-Kevin (KK4YEL) 

> On Dec 20, 2016, at 07:42, Charlie T, K3ICH <pincon at erols.com> wrote:
> 
> 
> "No trees were killed in the sending of this message. However, a large
> number of electrons were terribly inconvenienced !"
> 
> Yeah, but you have to realize, electrons LIKE to run around madly.  They
> LIVE for the opportunity to be driven by that strange (to them)
> electromotive force, regardless of whether it's in one direction (DC) or
> back and forth (AC), just as horses luv to run.
> They live basically a very nomadic life, jumping from one nucleus to
> another. They get sluggish if not driven regularly.  This is why old stock
> vacuum tubes can fail while just sitting on the shelf.
> Electrons also appreciate the applause as horses do when they perform, but
> seldom get to enjoy it.  So, when you make them run, at least provide a
> little noise so that know they're well liked.  Hmmm, maybe THAT"s why the
> transformer hums?
> 
> More to the point of the subject, I wonder if it would have been possible to
> use a brass bolt or maybe even nylon mounting hardware for the big toroid?
> Probably not worth the effort is a simple re-tightening can fix it. 
> ( You'll just have to provide some outside method of showing your
> appreciation to the electrons for their efforts.)
> 
> 73 Charlie k3ICH
> 
> 
> 
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