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Driver current on Eros tape and phono
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Topic: Driver current on Eros tape and phono (Read 3133 times)
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xcortes
Sr. Member
Posts: 997
Driver current on Eros tape and phono
«
on:
December 12, 2010, 05:25:54 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
Global Moderator
Hero Member
Posts: 5680
Re: Driver current on Eros tape and phono
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Reply #1 on:
December 12, 2010, 08:26:04 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
Sr. Member
Posts: 997
Re: Driver current on Eros tape and phono
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Reply #2 on:
December 13, 2010, 04:22:58 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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Driver current on Eros tape and phono