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In Reply to: RE: Harrison labs at parts express posted by Cleet Torres on July 07, 2014 at 06:52:39
You don't need another pair if IC's.Just put the cap inside the amplifier.
Replace the piece of wire between the RCA jack and the grid of the input tube with the proper value cap.
That cap and the grid resistor create the high pass filter.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 07/07/14Follow Ups:
If this is indeed a schematic for your amp the input impedance is 470k ohms.
A .00068uf cap, placed where shown, would cause a 6db per octave high pass filter with a -3db point of 500Hz.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
I do follow what you are saying. If I do go that route, I'll put it on a switch.
I prefer to have something obvious and in the eye so that I'm aware of the change whenever it's used. Years pass and you forget you modified a component and then it becomes a real head scratcher.
Regards
Cleet
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