VA3NR,
I had the same problem on a yearly basis on my lk-500. The fuse will go on
start up. Remove the tubes from the amp and turn on the amp. If the fuses don't
blow then you might have a bad tube, in the other hand if you still get the
same problem then it might be the filter caps. This was my problem! One or all
the filter caps might be bad. If so replace all of them. Then get your self an
inrush current protector from MFJ.
This was my problem there are other components on that filter board that also
might go bad but this was my only problem! I had no inrush current
protection. Good luck!
Pete. WO2E.
PS: CAREFUL HIGH VOLTAGES WILL DON'T LIKE LIVE HUMANS!
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