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Questions about tubes and gear that glows. FAQ

RE: hum from new tube

There's only so much you can do in hopes that it is not defective.

Try cleaning the tube pins. Also clean and tighten the socket claws in the voltage stage.

If that doesn't work maybe it does need some hours on it as suggested.

So leave it in the output stage for awhile and then try switching back.

The hum is coming through the speakers?

If not, and it's mechanical, can you supreme the hum by putting some light pressure on the tube?



"I know just enough to get into trouble. But not enough to get out of it."

Edits: 02/07/17

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