Earthquaker Devices Palisades

[nap_alfa55]

Hey all,

I'm looking for a schematic  of the Earthquaker Devices Palisades overdrive.

[thehallofshields]

I think it's just a Tube Screamer variation run at 18v. You would probably get a lot of milage by researching TS circuits and Charge Pumps, which can bump your 9V up to 18V.

One of the forum members here created the best article on TS circuits, and it's probably been reposted 1000x.

http://www.geofex.com/article_folders/tstech/tsxtech.htm

[edy_wheazel]

 It doesn't have a charge pump. The circuit is not hard to guess, it's a TS with some mods:
- the Bandwidth switch selects different values for C1 capacitor (20N in the original 808). This way you have bass cut/boost.
- it has a booster with a single transistor (maybe a J-Fet), you can try JHS Minibomb there.
- the Gain switch probably a different Gain pot, Gain B.
- Voice knob selects from 6 clipping modes, combinations between: 2 5mm green LED's, 1 3mm white (colour of the package), silicon diodes, 2 diodes that looks like some BAT43 Schottky's, 2 TO92 capsule transistors (maybe BS170 MosFet).
- the Normal/Bright switch probably selects the value of the 47N capacitor from pin 2 of the Op-Amp.

Breadboard it and have fun!

[thehallofshields]

^Bang!