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RE: Note to folks performing my PAS RIAA mod

166.250.0.15

Posted by sbalfour on March 24, 2011 at 12:01:13

In Reply to: RE: Note to folks performing my PAS RIAA mod posted by Joe Curcio on March 24, 2011 at 11:09:02:

>>the response departs from spec significantly especially below 100H

Other than the 2M resistor, and a 3% change to the 2750uuf cap, the
rest of the mod is to the RC time constants of the other poles/zeros.
These don't affect the response below 100hz. I'd like to see the
response curve with just a 2.0Mohm 1% resistor in place.

The mod is a quite large change if more phono inputs is the goal. The kit
instructions include alternate wiring for "special" as a second phono
input with just a change of a couple of wires. A few more wires change
can convert the line level Spare input to a third phono input, if need be.
Many "other" turntables are MC anyway, so the additional phono input(s)
won't help.
Stuart

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