RE: Gradual build-up of darkish coating on power triodes

Tubes Asylum

Questions about tubes and gear that glows.

In Reply to: Gradual build-up of darkish coating on power triodes posted by mhardyman on July 8, 2012 at 17:51:54:

I've noticed some Chinese power tubes (and rectifier tubes) have a tendancy to do that, whereas American and Russian tubes do not.

What I've seen is sort of a translucent brown stain. I don't think it's anything to worry about.

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Follow Ups Full Thread

Topic - Gradual build-up of darkish coating on power triodes - mhardyman 17:51:54 07/08/12 (3)

RE: Gradual build-up of darkish coating on power triodes - Alpha Al 12:20:17 07/10/12 (1)

RE: Gradual build-up of darkish coating on power triodes - mhardyman 13:12:30 07/10/12 (0)

Check your filament voltage - Chris O 07:27:46 07/10/12 (0)

Follow Ups

RE: Gradual build-up of darkish coating on power triodes - Alpha Al 12:20:17 07/10/12 (1)

RE: Gradual build-up of darkish coating on power triodes - mhardyman 13:12:30 07/10/12 (0)

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