I have the tubes4hifi Classic board installed. Excellent sound. Mishap as follows
Installed quad of 6CA7's with the #6 pin intact.
The V3 tube flared and died minutes after biasing to 40ma. Blew the fuse also.
Reinstalled quad of EL34( no 6 pin). V3 tube lights up, but reads 0.00 on meter. All other tubes are able to be biased.
As a bonus, there is an audible transformer buzz, not present before.
Any ideas on what has happened ? I'm not technically inclined and will need a tech to interpret, LOL
Thanks ! Mike