Wah

Oops - I put my wah analysis over here...

I'll need to mash these two together some day.

http://www.geofex.com/article_folders/wahpedl/wahped.htm

Using Keen's designators, Rfb controls the gain of Q1 via shunt negative feedback to the input. Rfb is not defined in the otherwise complete list of "what does what," so I did some experimenting with my sweep generator. Increasing this value increases the gain of everything around the pass band, and doesn't do much to increase the pass band output.

Replacement Pot Notes

Tried the McCon-O-Pot II in a vintage Thomas Organ Cry Baby with TDK inductor. Sounds right with my '60s wah repertoire. I would recommend it again.

I've replaced many pots with the generic 100kA pot from CE Distribution without complaint.

I was particularly impressed by a recent (c. 2015) Dunlop GCB-95F with Dunlop's Fasel inductor. It sounded very good with my '60s wah repertoire. Don't know if they're all like that, or if I happened to luck out on one.

I was particularly unimpressed by a recent (c. 2015) Vox V846HW "Hand Wired" wah. How something is wired (by hand, by machine) shouldn't matter as long as it is done competently. It sounded just like the typical ho-hum Vox and Dunlop cheap wahs.

The vintage wah sound I listen for, when testing wah pedals, is a match for the clean wah tones on Disraeli Gears, Axis: Bold As Love, and Electric Ladyland. When those riffs sounds right, I'm impressed and I take note because very few wahs really get those spot on.