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RE: 5692

Posted by MLin (A) on December 18, 2023 at 21:38:01

In Reply to: 5692 posted by Lew on December 18, 2023 at 20:02:32:

Thanks Ralph and Lew. I can confirm that it's the tube that's microphonic and has nothing to do with the tube socket. It was just my wishful thinking that maybe I did not insert them firmly and tightly into the socket that contributed to the ringing noise.

The MP-1 is well isolated and has the full damping upgrade from the factory. These two KenRad tubes (one 6SN7GT, one VT231) are just badly microphonic - turning the Shallco volume pot was enough to make them ring. They do have very nice sound though so I am thinking about putting them in the V2 position of the MA-1.

Agree with the 5692 tubes being robustly constructed and not likely to ring. I actually remember reading somewhere they were made for military purposes and intended to be used in equipments situated at artillery base.

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