[PTP] VOX Grey Wah-Wah

Presented project can be done on 0,15 pitch perforated board which does not exist! You have to made one based on template provided, or use standard IC friendly perfbord with little size adjustment.

Original dimension in inches:
– Board dimension 3,5 long / 0,75 wide
– Component raster holes 0,45
– Distance between components 0,15

AFAIK two variants was offered back in 60’s.

The first – pre-production model was build on tag board by legendary Mr. Del Casher and his wife. This first version is often called prototype

I had just three picts of this early unit, those are not common you see. But it match the schematic, and looks right to me. In short turretboard.org is happy to introduce this layout as first, no one ever did this before 🙂

Get the file here, and enjoy

It uses BC150 transistors. No notes about inductor in this one, it looks very much like the one in my old Foxx Fuzz-Wah-Volume pedal, brown coated – similar in look to Stack-Of-Dimes.

Second issue was build Point-To-Point around perforated none-copper board and this is what you have here. Project revised 05/09/2012 – wiring error fixed AGAIN

Full production unit, at least 2000 units was made. 2N3707 (Texas Instrument) transistors ware used in most of the cases. I’ve seen one unit, owned by Jan from Sweaden with BC150 as in early tagboard prototype version.

Other component types: Iskra brand resistors, Styroflex type 10nF caps, yellow 220nF caps similar to WIMA TFF’s, 250mH inductor with flying legs.

Layout shows reversed in’s and out’s, just like in real unit

Please note unusual transistor pinout if you’re going to use substitutions…

At the day of writing this e-amptone.com stocks N.O.S 2N3707 for 0,49 EUR.

If you ask the guy nicely, he can even measure them for you, just say turretboard.org sent you!