freestompboxes.org

Pics if anyone's interested. It's an ok wah, but nothing special. I like my 1970s Jen much more.

Hi SFTFN,

Can you tell us what model of transistors are soldered in this board ?

FWIW, the inductor is made from an EPCOS (formerly Siemens) ferrite core: the material compound is N48 that is well suited to work at low frequencies, and the other number stamped "630" indicates a coefficient since this core has grinded an air gap internally.



To obtain the usual value of inductance needed in a wah pedal (500 mH) we must crank about 891 turns of enameled wire in this particular size of core.

Cheers,
Jose

Interesting information about the inductor.

All transistors are marked C549C PH66, so they're bc549 type. The two blue caps on the bottom part of the board are 10n btw.