Sorry for reopening an old topic, however, this is an old amp

I'm thinking about converting the 22k linear Pre-amp pot to a reverse(anti)log pot as discussed above using the methods described here http://www.geofex.com/article_folders/potsecrets/potscret.htm.  I have 2 ideas in mind:

If I'm doing the math right, I'll need a 500k resistor across the first 2 pins of the original 22k pot.  My concern is, is doing this going to give me enough of a curve?  Either a 500k will give a huge curve, or a straight line... the math is escaping me, but I'm leaning towards almost straight.

Another option I was considering, is replacing the 22k pot with a 50k pot and placing a 50k resistor on the first 2 pins.  This should give me a reverse log curve at 25k.

Any feedback on the above is appreciated!