[sdiy] Polymoog Resonantor Clone PCB preview

[JH.]

+/-15V DC, or 18V AC (wallwart)

JH.


----- Original Message ----- 
From: "Michael Zacherl." <sdiy-mz01 at blauwurf.info>
To: "JH." <jhaible at debitel.net>
Cc: "Eric Schoerghofer" <eric.schoerghofer at utanet.at>
Sent: Wednesday, August 12, 2009 9:56 AM
Subject: Re: [sdiy] Polymoog Resonantor Clone PCB preview


Hi Jürgen,

    great!!

What supply voltages can be used with that?

BTW, Kenneth Elhardt ripped out the original of his Polymoog and demos
it here:
<http://www.youtube.com/watch?v=_XUiJi5153Y&fmt=18>

    Michael.  :-)

On Aug 12, 2009, at 8:18 AM, 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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