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Antique Radio Technical Forum
Blue flashes when testing tubes.

Posted by Johnny on 04/04/2009 22:27

Hi, when I test somes tubes with a Superior TV-11, sometimes I see blue flash inside tube and the meter needle is crazy. But when I test these tubes in a Heatkit TC-1, all is ok. Tubes are bad or I have a bad tester?

Thank you.

Blue flashes when testing tubes. 
Johnny 04/04/2009 22:27 
Thomas Dermody 04/04/2009 23:01 
Johnny 04/05/2009 11:15 
Thomas Dermody 04/05/2009 14:20 

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