In Reply to: RE: New Tubes (6CA7)--now bias too high posted by petercapo on February 9, 2016 at 15:49:23:
Thanks, Peter. I didn't think there should be any bias issues either as these are touted as a drop-in replacement for EL-34's. Unfortunately, the reading does not drop after a few seconds and continues to rise slowly. I haven't kept the amp powered on for more than a few minutes with these for fear of damaging something. I replaced the tube sockets a couple of years ago with ceramic ones. When I swap EL34s back in I am able to bias them fine. I'll try you re-tensioning trick.
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Follow Ups
- RE: New Tubes (6CA7)--now bias too high - daveap 17:04:47 02/10/16 (7)
- RE: New Tubes (6CA7)--now bias too high - petercapo 17:19:10 02/10/16 (6)
- RE: New Tubes (6CA7)--now bias too high - daveap 13:19:56 02/11/16 (5)
- RE: New Tubes (6CA7)--now bias too high - petercapo 14:15:10 02/11/16 (4)
- RE: New Tubes (6CA7)--now bias too high - xaudiomanx 17:49:02 02/15/16 (3)
- RE: New Tubes (6CA7)--now bias too high - daveap 15:04:04 02/16/16 (2)
- RE: New Tubes (6CA7)--now bias too high - xaudiomanx 17:32:24 02/16/16 (1)
- RE: New Tubes (6CA7)--now bias too high - jsblock 04:56:04 05/05/16 (0)