Quote:
Originally Posted by Olorin67
make sure the filter caps are good before you put in the new 5U4, it could blow if those are shorted.
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Only set I ever found with a 5U4 ruined like yours (twas a 1952 Majestic brand) is had several shorted/high leakage lytics, and every damn paper cap was a dead short or leaky below 50V. If the caps failed suddenly and a ton of current is drawn through the tube, it is possible for redplating and hot spots bad enough to cause heat fracturing of the glass to occur....