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In Reply to: PVA Standard Audio Passive Pre-Amplifier posted by GBLPS on March 23, 2007 at 14:20:13:
Comments please!Forget it. The PVA has an input impedance of only about 150 ohms (no, that's not a typo, one, five, zero). Your tube phono stage would blow chunks trying to drive it.
se
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nt
It may be wired for a whopping 600 ohms ... seems more likely to be well driven from an opamp that way.
It may be wired for a whopping 600 ohms ... seems more likely to be well driven from an opamp that way.
I'm pretty sure the "75 to 600 ohm" is referring not to the PVA's input impedance, but rather the output impedance of the source driving it. It's a 1:8 step-up with a 10k load. That translates into a little over 150 ohms plus some wire resistance.
se
what kind of chunks might those be Mr. Eddy?
what kind of chunks might those be Mr. Eddy?
Why, Campbell's, of course!
se
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