|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
75.140.84.148
In Reply to: RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! posted by Paul Kehayas on December 20, 2016 at 13:11:36
Some coupling caps maybe passing too much DC. That'll make tubes get noisy, go microphonic, and die more easily.
Follow Ups:
Recently checked and it happened in two pieces of gear. I think it's reliability here that is the issue.
Paul
from amps which I've worked on (and ppl want TFK or some such replacement tubes). Many, many test very high and are quiet.
I'm surprised at your experience. Maybe, the tubes were rejects.
They were high and quiet. These are part of a scratch and dent sale that is on the site. Those of you who are guessing, keep the name of the organization to yourselves. I don't wish to get into a war about it with the vendor.
Just too coincidental. Interesting that a new set of tubes a friend of mine bought (also RCA blacks) tested great but lesser than what was stated on the package. This was by my techs...)
Anyway...not to worry. I am looking for alternatives in the rational current production world.
Trying out a Gold Lion ECC83 in the single position in the MX110 and in that application it doesn't sound half bad compared to the long grey plate 12Ax7...
Paul
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: