In Reply to: What to do with 412 volts posted by BofService on March 8, 2017 at 17:28:26:
There might be some derating built into them. You could build a SE el34/kt66 amp like Eli suggested. With biasing at 60ma. Then see how warm they get with running 6550 tubes with the bias set at 70ma. If they get pretty hot after an hour you probably need to back down. But, el34 or el37 and kt66 sound really nice at 60 to 65ma.
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Follow Ups
- RE: Are these military potted trannys? - DAK 08:45:49 03/09/17 (10)
- RE: Are these military potted trannys? - BofService 11:01:23 03/11/17 (3)
- RE: Does it have military markings - DAK 11:05:37 03/12/17 (2)
- RE: Does it have military markings - BofService 12:40:44 03/12/17 (1)
- RE: Does it have military markings - DAK 14:39:24 03/12/17 (0)
- RE: Are these military potted trannys? - BofService 15:30:49 03/10/17 (0)
- RE: Are these military potted trannys? - Eli Duttman 18:40:26 03/09/17 (2)
- RE: Are these military potted trannys? - BofService 16:05:21 03/10/17 (1)
- RE: Are these military potted trannys? - Eli Duttman 17:41:03 03/10/17 (0)
- RE: Are these military potted trannys? - Tre' 18:13:53 03/09/17 (1)
- Unfortunately, i never collected them - DAK 18:41:53 03/09/17 (0)