[sdiy] Polymoog Resonantor Clone PCB preview

[Tom Wiltshire]

Hi JH,

Have you got a schematic for this that we can see?

Like some of the posters on the Electromusic forum, I'd be interested  
to see this for comparison with Polykorg resonators and other designs.

I think reading schematics to see the way different people approached  
the same basic task is fascinating. It's where you see the mind of  
the designer in the work.

Regards,
Tom



On 12 Aug 2009, at 07:18, JH. wrote:

> http://electro-music.com/forum/phpbb-files/poly_m_reso_preview_769.jpg
>
> This 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.
>
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