Just came off 20M, amp working fine. Went to 160 plate and load controls
have no control, no output. Plate current climbs high with any added drive
(45-50W) and blew both 10amp fuses.Off comes the cover.jimk2hn
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It might be something else, but I would bet the contact on the 160 padding
capacitor is burned off. This is what the anti-corona washer reduced. Heath
did not use that washer.
It arcs there when the loading cap is too far closed (too much grid current)
for the amount of drive on higher bands, or if the antenna should become
grossly mismatched when at high power on bands other than 160. The worse
band for arcing the 160 padding contact is when on 80 meters.
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