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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: Life Test - How Important? posted by Steve O on September 17, 2016 at 10:43:36:
Especially for power tubes because most testers just do not put enough DC across the tube to get to get a real indication. I measure B+ across a KT88 from plate to cathode in the Hickok 539c and it was 150vdc. When I measured it across the Heathkit TT-1,it was 275vdc.While neither is near the operating voltage of a typical KT88,that extra 125vdc does help to give a more accurate picture of the tube IMHO.I do like some tests on the 539c such as the noise test with an AM radio however,I did set up add a couple input and output jacks where I can inject and monitor the signal of dual triodes on the TT-1.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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- RE: Life Test - How Important? - Michael Samra 20:17:58 09/17/16 (0)
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