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Old 08-07-2018, 03:24 PM
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zeno zeno is offline
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Join Date: Mar 2013
Location: New Hampshire
Posts: 4,918
Run for about 30 sec then unpower & feel the 2SD1555.
To hot to touch most likely bad FBT or rectifier off it.
If cool or a little warm turn up variac & see if things improve.
The amps sometimes fall as the AC volts go up.
Keep in mind the HOT can short again if not careful. My advantage
doing this was knowing what I could get away with !

73 Zeno
LFOD !
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