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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: 300B - Is this thermal runaway ? posted by Burney on October 29, 2021 at 13:26:38:
As you have tried 3 different caps, that seems unlikely to be the problem. But the grid is being raised 275v above ground, and there must be a reason. Several candidate reasons (oscillation, open grid-ground resistor or connections, leaky coupling cap) have been covered in this thread, and rejected for reasons - it may be necessary to question those reasons more deeply. Or come up with another cause, such as a short from B+ to grid
I wouldn't worry about the low current draw until that issue is resolved.
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- RE: 300B - Is this thermal runaway ? - Paul Joppa 16:59:33 10/29/21 (0)
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