http://electro-music.com/forum/phpbb-files/poly_m_reso_preview_769.jpgThis was an easy one to layout.
And it will be an easy project to solder, this time!
And unexpensive, too. Depends on the potentiometers or sliders you're going to use. PCB will be 27 Euros as usual. Electronic
components will be very unexpensive. Potentiometers, enclosure etc will make the biggest part of the bill here.
I've painstakingly taken care to preserve the character of the original, using the same low slewrate opamps, MOSFET switches, and DC
bias (which results in very unsymmetric headroom) as the original.
You can use modern opamps instead, of course. And there is plenty of space to use whatever capacitors you like, in the filter
sections. No problem to go for a High End version with polystyrene caps and modern audio opamps, if you like. But you can - and I
will, for my self - just build it like the original.
Send me an email if you're interested in this. If I get enough "resonance", I will start a PCB run in a month or so.
(No audio demos yet - I must first have one prototype made for myself!)
JH.