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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: It is mechanical............ posted by lektrik on January 15, 2008 at 17:05:27:
Are you sure you don't have DC riding on your AC line?
DC will cause power transformers to hum relative to the amount of DC on the line.
Also, I'm no tube expert by any means but it may be the different heater current draws between the EL34 and the KT88 that is causing the differences in the hum level in the amp when the tubes are swapped.
Cheers
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Follow Ups
- RE: It is mechanical............ - kenster 17:31:23 01/15/08 (7)
- How come "DC ridng on AC line"? (nt) - cheap-Jack 11:26:57 01/16/08 (0)
- DC on the AC line? - lektrik 18:10:36 01/15/08 (1)
- RE: DC on the AC line? - kenster 18:25:56 01/15/08 (0)
- What would be a good solution if that's the problem? - lektrik 18:02:43 01/15/08 (3)
- RE: What would be a good solution if that's the problem? - and this - HumanMedia 05:06:08 01/17/08 (1)
- Now that's what I'm looking for.......... - lektrik 06:28:37 01/17/08 (0)
- RE: What would be a good solution if that's the problem? - kenster 18:14:23 01/15/08 (0)
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