Скачать или смотреть Microphonic tubes ECC81 shown and explained tube amplifier related

in this short video i show 3 different ECC81 in exactly the same test setup,
speaker gain, test unit gain, distance to speaker, all the SAME..
all tubes perform perfect when tested on my AVO 163 tube tester.
A Microphonic tube is a DEFECTIVE tube, and should simply be replaced, dont add all sorts of funny rubber rings to them, it is ridiculous, and it looks terrible too..
Thanks to Philip for this : Tektronix documentation on how they tested their selected tubes for microphonics? It’s a very interesting read :
https://w140.com/tekwiki/images/1/14/...
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when you are done with this video,
PLEASE try scroll thru my other videos here
   / @teardownoz2cpu  
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#tubeamplifier
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I use auto generated subs, i am sorry there are a few spelling errors,
maybe one day they can do it better..
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