My thanks to all who replied to help me understand the problem I was having
with an AL-811.
It was blowing fuses immediately on power up. Based on suggestions, I checked
HV supply diodes & capacitors - all OK. Then I secured the plate connectors
with plastic cable ties & tried powering up amp with tubes removed - HV came up
OK. I felt confident after that ordering & installing new tubes*. Amp is
working normally again.
(* Quick delivery on a matched set from RF Parts - good service.)
Thanks,
Chris VA3NR
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