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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: sibilance and plate voltage.... posted by dls123 on March 12, 2006 at 20:20:17:
Hi Don,Well if you use a tube recitfier it wouldn't be hard to test your theory. Try swapping in a rectifier with a larger voltage drop. For example, if your amp uses a 5AR4 recitifier, try a 5U4 or a 5R4 to lower the B+.
Another idea: The sound you describe might be helped by the addition of a "grid stopper" resistor in front of each output tube. Ask your designer. Some people use grid stoppers on every tube; some almost never use them. I have found that 6550 can sound bright and spitty without a grid stopper. Try a 1K carbon comp soldered very close to the grid of the 6550.
From my experience 10 volts either way for B+ won't change the sound of an amp.
Best o luck there.
Dale.
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Follow Ups
- Re: sibilance and plate voltage.... - Dale D 20:38:36 03/12/06 (4)
- Re: sibilance and plate voltage.... - dls123 20:45:57 03/12/06 (3)
- Re: sibilance and plate voltage.... - Jimmy 07:08:44 03/13/06 (2)
- Re: sibilance and plate voltage.... - dls123 16:39:46 03/14/06 (0)
- Re: sibilance and plate voltage.... - dls123 07:49:52 03/13/06 (0)
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