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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: Re: Reduced bias setting for fewer tubes in atma M60? posted by Atmaluvr on April 5, 2005 at 06:40:31:
- I thought that the recommended bias setting for the 6AS7s was .075 per tube, e.g. 4 tubes = 0.3ma?(Taking this to mean 0.3A or 300mA)
This is still reasonable, but on the high side. Our bias specs are somewhat conservative - a balance between long service and best sound.
I find that (in my own system) there isn't any major improvement going from 550 to 600mA, and at times I had the sense that the higher bias settings were making the amps a sound a little taught; high-strung you might say.
In any event, I would never take an M-60 over 600mA, period. Failures become more likely.
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Follow Ups
- Re: Reduced bias setting for fewer tubes in atma M60? - Legendre 10:53:35 04/05/05 (0)
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