12-19-2013, 12:37 PM
If there is a blue glowing spot just inside the glass but not within the tube's elements, your tube is probably OK.
If there is a violet glow within the tube's elements as Phlogiston's photo shows above, your tube is bad, period, end of story.
Note: Not applicable to gas-filled rectifiers or thyratrons.
If there is a violet glow within the tube's elements as Phlogiston's photo shows above, your tube is bad, period, end of story.
Note: Not applicable to gas-filled rectifiers or thyratrons.
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Ron Ramirez
Ferdinand IN