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Dynaco: it's not "low cathode resistor bias".

> > All the dynacos and the HK citations and the eicos all of them use the 10 to 15 ohm resistor to bias the cathode. > >

Actually all the Dynaco's that used a small, shared cathode resistor, also used a fixed negative bias supply on the grids of the power tubes. Look closer at the schematics.
In one of their pieces of literature, or in an interview I read somewhere, Hafler explained that the small resistor was found experimentally to reduce IM.
I can't vouch for all the other makers, but I'd be surprised if it wasn't the same technique.

Joel


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  • Dynaco: it's not "low cathode resistor bias". - Joelt 07/17/0504:30:37 07/17/05 (6)


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