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Heritage Owners Club

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Posted
Tung Sol reissue tubes have almost no filament glow when compared to other tubes. only the sovtek LPS has less glow, due to the spiral filament.

Does the brightness of glow mean anything at all?

Posted
Does the brightness of glow mean anything at all?

Only if it's glowing blue, and on the outside! Which means you have a leak in the tube. And then, of course, if there is NO glow and the tube doesn't get hot.

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