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)
- Re: in some amps using pentodes, it seems it is possible to use tubes are not direct equivalent. - Michael Samra 00:19:06 04/11/07 (1)
- Re: in some amps using pentodes, it seems it is possible to use tubes are not direct equivalent. - Ray Moth 06:43:57 04/13/07 (0)