11-26-2025, 06:57 AM
Hi Bob,
Is it possible that you have a screen to grid, screen to suppressor or beam forming plates or screen to plate short? If the output transformer is open, the screen will absorb all tube current, in some cases, causing the screen to overheat to the point of incandescence, melt and short to another element. I had this occur once to a 6K6 in a GE set with an open output transformer primary and in another case, almost destroyed a globe 42 on a Philco 80.
Is it possible that you have a screen to grid, screen to suppressor or beam forming plates or screen to plate short? If the output transformer is open, the screen will absorb all tube current, in some cases, causing the screen to overheat to the point of incandescence, melt and short to another element. I had this occur once to a 6K6 in a GE set with an open output transformer primary and in another case, almost destroyed a globe 42 on a Philco 80.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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