Hello everyone! I would like to propose a question about a 6922 valve. I recently purchased a used Audio Research LS7, after a few hours
of listening, turning the preamp back on I heard a hum in the speakers.
I started trying to disconnect the various connected electronics until
the only preamp remains, it was he who generated the noise. after a
visual analysis I noticed that valve 4 was like in the photo.😕 The valve is a sovtek. Has it reached the end of its life?
Thanks to those who can answer me!
Good music
Giorgio
of listening, turning the preamp back on I heard a hum in the speakers.
I started trying to disconnect the various connected electronics until
the only preamp remains, it was he who generated the noise. after a
visual analysis I noticed that valve 4 was like in the photo.😕 The valve is a sovtek. Has it reached the end of its life?
Thanks to those who can answer me!
Good music
Giorgio
White getter means that the tube isn't hermetically sealed anymore. There must be a crack somewhere.
And yes, it is useless now.
And yes, it is useless now.
The problem is mainly about the method to insert the tubes in a socket. In AR stuff the socket are strong and the insertion is not fast and easy
It is not a problem of NOS or new.
Walter
It is not a problem of NOS or new.
Walter