Hotpotz 1 and 2 are same fast ramp or kinked taper, same as all thomas crybabies going back to 71 or so ( Allen Bradley, Clarostat and Centralab all supplied thomas, their methods for making the taper affected the feel, there were slight deviations on the basic recipe) Most people are most familiar with this taper, sort of a quack . Lotta bang with little foot movement. Hotpotz1 are usually 107k to 128k, HP2 is tighter tolerance, 96k to 102k typically. This effects tone a little. Generally, 127k is creamier top end than 96k. The new square -body " hotpotz " found in minI crybaby and all gcb95 post 2018 are less kinked, somewhere halfway between hotpotz2 and audio.
Old Icar and my RV4 "smooth pot" are essentially audio/log taper. Regular log for regular wah shells, including post 74 rectangle shape dearmond wahs and vols.
rev log in boomerang, which has the pot on opposite side .
I use Rev log in crybaby shell for some of my colorsound inspired joe-sonic wahs, the treble comes in at very end of toe down, similar to the actuator in colorsound.
Linear pots are awesome for wah. Foxx, musonic, snarling dogs and others use linear. The colorsounds do not use the bottom 45%of the pot value, the circuit is biased in a way that makes them oscillate in the lows if you set them to the low part of the pot.
Lin brings out more harmonics for inductor wahs in my experience. I believe this is related to the charge/discharge rate of the inductor cap. The slower resistance action allows the cap to charge more fully, adding texture (theory).
Crybaby wah shells need modding to use lin, approx 3 or 4 more teeth on the rack gear, + some grinding at the heel of wah top. Dunlop made their rack gear approx 1/4" longer starting in mid 2000s.
Thomas stereo fuzz wah in the mid 70s used 2 centralab pots, standard fast ramp crybaby taper, reverse taper on opposite side.
Bg2 boomerangs all had centralab pots, a modified rev log (condensed) taper, usually measure 27 to 30k, despite being called 25k. Modern pec RV4 25k are low, usually 23k and do not sound right.
Re: the 470k hotpotz . The jimi hendrix wah used 470k hotpotz1 in the early 90s. When the hotpotz2 came out in 95, they made a 470k fast-ramp version for the hendrix wah. The Dunlop volume pedal had a 470k hotpotz2 that was a more spread out taper than the jimi wah version. At some point, the volume pedal got a 250K hotpotz2, mid 2000s they gave up and just went to 100k hotpotz2 for the jimi wah.
Standard gear for wah is 14 teeth. I have used 11, 12, 13, 14, 15, 16, 18, 20, and 22 in various pedals.
All of the above is approximate, averaged out for post brevity. Of course there are exceptions and minor deviations.
