[Elecraft] KPA500 Hum

[Mike Fatchett W0MU]

My KPA500 now seems to have the hummms.  It comes and goes whether the 
unit is on or off.  It does go away when you turn off the rear switch.

I noticed someone changed the tap and that appeared to fix the hum.

I am running the amp on 110V.  My actual wall voltage is 119V.

I did not notice this at all while I was at our Montana home over the 
summer.

Mike W0MU

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J6/W0MU November 21 - December 1 2011 CQ WW DX CW
W0MU-1 CC Cluster w0mu.net