Author Topic: What causes vacuum tubes to red plate? (Electronic theory)  (Read 673 times)

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Offline johnlsenchak

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What causes vacuum tubes to red plate? (Electronic theory)
« on: January 20, 2019, 07:09:34 pm »

What causes vacuum tubes to red plate?
Blueglow Electronics
BG230 - talking about the causes of vacuum tubes to red plate in audio amplifiers. We cover some basics on how tubes
operate and common causes of tube red platting. Most of the time its not the tube, there is something wrong with the
amplifier or it's bias settings.


Posted  1/20/2019
John Senchak "Daytona  Beach  Florida "
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Offline trevatxtal

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Re: What causes vacuum tubes to red plate? (Electronic theory)
« Reply #1 on: January 21, 2019, 07:54:45 am »
Lack of bias to the Grid causes over current cathode to anode.
Bluing or plasma discharge is by Ionized air, probably given off by overheating.
The Vacuum tube or Thermionic Valve as we like to call them
It now highly suspect

Ionized-air glow
From Wikipedia, the free encyclopedia
Ionized-air glow is the fluorescent emission of characteristic blue–purple–violet light, of color called electric blue, by air subjected to an energy flux.
 


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