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in some amps using pentodes, it seems it is possible to use tubes are not direct equivalent.

like some people using el34 in place of 6550. Is this because the amp has changeable bias?

do you really need to change the bias?

thank you.


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Topic - in some amps using pentodes, it seems it is possible to use tubes are not direct equivalent. - jarthel 23:34:14 04/10/07 (2)


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