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Re: didn't like the triode mod on my ST70

Put me down on the list of those who have tried this modification and never liked it. I have even "A-B'd" the sound between two otherwise identical ST70's.

There is a thorough discussion of triode connected pentodes, and particularly the ST70 on page 35 of Sound Practices Fall '92 issue by Herb Reichert.

Basically, feedback drops from 18.8db to 10db, distortion increases from 1% at 30 watts to 2.7% at 15 watts. Sensitivity falls from 1.3v for 30 watts to 1.6v for 15 watts.





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