Ross Phaser clone (the FET one!)

[Harold]

I recently made myself a multi effect in a large 1550G enclosure, but that also meant that I had to switch back to my Tonepad Ross Phaser clone. I also own 2 original orange v2 USA Ross Phasers and they sound much better than the LM13600/700 v3 clone by Tonepad, so I decided that I wanted to clone an old one!

It didn't take long to discover that the AM97C10 or AM97C11 FET-arrays that shipped in the v2 Ross phaser aren't available anymore and that there is no replacement for it. The best shot would be 4 matched general purpose FET's like the 2N5460.

I made this unverified layout for it, also included is a voltage inverter so that this positive ground pedal can be used on a daisy:


And here's the schematic: http://www.home-wrecker.com/ross_phaser_orange2.png


I still have some questions about this before I try to build it:
1) Is my layout correct?
2) Can this phaser be converted to negative ground by connecting the Recycle pot, C10, C16, C20 and R31 to 0v?
3) Is the 2N5460 the best candidate in this phaser?


Once those questions are answered, I'll post the complete .diy file here...

Cheers!

[skiraly017]

Interest/update bump.

[Harold]

Interest/update bump.

Well, here's a small update then

It seems that it can be made negative ground so I will update the layout as soon as I find the time. I already found a supplier for a matched quartet of 2N5460's so the build can start somewhere in the next 2 weeks!