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General Discussion
Humming sound
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<blockquote data-quote="gavinbirss" data-source="post: 795873" data-attributes="member: 60"><p>No, the new tubes may be noisy and or microphonic. </p><p>Low noise tube a generally used in preamp/1st gain stage but this is not always what is used.</p><p></p><p>I have a lovely pair of E180CC miniwat dario/IBM and pinched waste 5965 tubes that hum like crazy.... </p><p>If I can get past the hum I would use them...</p><p></p><p>Hum and noise needs to be tested in a simulation circuit with the appropriate gear, normal tube tests for emissions will not reveal this.</p></blockquote><p></p>
[QUOTE="gavinbirss, post: 795873, member: 60"] No, the new tubes may be noisy and or microphonic. Low noise tube a generally used in preamp/1st gain stage but this is not always what is used. I have a lovely pair of E180CC miniwat dario/IBM and pinched waste 5965 tubes that hum like crazy.... If I can get past the hum I would use them... Hum and noise needs to be tested in a simulation circuit with the appropriate gear, normal tube tests for emissions will not reveal this. [/QUOTE]
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Audio and Video Talk
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Humming sound
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