In Reply to: 6SN7 Heaters affecting sound incredibly? posted by mashley on May 18, 2016 at 18:12:37:
You may not be able to put with the increase in 60Hz hum but you should try plain old AC on those 300B filaments. Healthier for the tubes and sounds much better than unregulated DC supply.
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Follow Ups
- RE: 6SN7 Heaters affecting sound incredibly? - TubeDriver 10:43:04 05/19/16 (0)