Tonecontrols for the LeachPreamp

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I will make the Wide Bandwidth Preamp construct by W. Marshall Leach:
http://users.ece.gatech.edu/~mleach/papers/wbpreamp/feb77article.pdf]http://users.ece.gatech.edu/~mleach...eb77article.pdf <http://users.ece.gatech.edu/~mleach/papers/wbpreamp/feb77article.pdf[/URL]
I will make the preamp with tonecontrols and put in a relay which can bypass the tonecontrols.
But I have a problem:

The pot for bass and treble should have revers log taper, but I can't find any pot with shaft and reverse log thaper.

How can I solve this problem?
 
Depending on how the pot is used, you can achieve various tapers by using lin pots and parallelling resistors across the wiper and/or the whole pot. This may require some experimenting, but is absolutely possible.
At some point I saw a calculator for this somewhere on the net... try some googling.............

OTOH, may I suggest using another tone circuit....- there is a lot of different tone control circuits out there, which uses "normal" components. Anti-log taper has always been quite rare.....

EDIT:
HAH-knew I had seen it somewhere....
( or actually- this is not a new trick )
http://sound.westhost.com/pots.htm#chg-law
 
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