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In Reply to: Input impedance posted by KurtP on March 26, 2007 at 04:39:05:
Yes, I am building a Raven, I am just not sure how close to the original design, as I may use different tubes, or op points. As far as the value of the series resistors, you just want to make sure than the source doesn't suffer response issues at lower volume settings. The trade off is you will concede a little gain. Since the shunt pot is in a fairly low impedance loop, I don't think that a higher value would add very much noise unless you went to a very large value of series resistor.
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