Quote:
Originally Posted by vortalexfan
without that white wire attached to the 5U4 tube socket the tube doesn't arc anymore which I'm guessing means that the filter choke is bad.
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All it means is that the power transformer and tube, and tube socket are good (and that the short is inor down stream of L1). You need to confirm L1 is bad by unhooking both leads on the choke and measure resistance of both to ground and confirm it is a measurable/low resistance to confirm L1 is bad. If L1 is infinite resistance to ground then it is good and you still need to find the actual short.
Gotta keep dividing and conquering... you've cleared some of the more important parts, and found a a direction to follow to find the short. Keep at it.
Don't let yourself get lazy or confused.