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Bottlehead Forum > Bottlehead Kits > Eros Tape > Driver current on Eros tape and phono
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Author Topic: Driver current on Eros tape and phono  (Read 624 times)
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xcortes
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« on: December 12, 2010, 08:25:54 AM »
Why is the driver current different on the tape and phono versions of the Eros? Just curious.
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Xavier Cortes
Paul Joppa
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« Reply #1 on: December 12, 2010, 11:26:04 AM »
It isn't. You're looking at the first stage C4S, right? The tube is paralleled with a load resistor, 75K or 200K depending. The extra current feeds the 75K resistor, the net current through the tube is the same.  :^)
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Paul Joppa
xcortes
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« Reply #2 on: December 13, 2010, 07:22:58 AM »
Thanks Paul,

I guess this is a sample of the intrincacies of designing a direct coupled amp that has an eq network.
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Xavier Cortes
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