[sdiy] Pink?

Rutger Vlek rutgervlek at gmail.com
Thu Sep 6 10:48:45 CEST 2018

Hi Michael,

I'll get back to your question about supply voltage, now I'm back home, as promised.

I had a look at the schematics and can confirm that Marble would run fine on 15V supplies! The would be few tiny differences in how it behaves, but otherwise identical to 12V operation. With 15V supplies:

- the OTAs would have a little more headroom
- the peak LEDs would be slightly brighter (still safe for the LED)
- probably most noticeable: the control range of the manual tone knobs would be a little too wide, but that could be easily solved by replacing two resistors (SMD). I'd be happy to do that for you, if you wish.

If you'd want to mount this in a 5U system, you'd probably need to find an substitute for the Euro frontpanel, and wire controls and sockets manually. I can provide you with the values and tapers of the pots, and explain the wiring of the sockets if you wish to go down this route.



On 18 aug 2018, at 13:27, Michael Zacherl wrote:

>> On 18 Aug 2018, at 11:12, Rutger Vlek <rutgervlek at gmail.com> wrote:
>> Oh here's the product page of this spectral tilt module with a demo: http://riversynths.com/product/marble/
> just to ask, that of course wouldn’t run off 15V when designed with discrete OTAs?
> BTW … gotcha!
> https://www.soundonsound.com/reviews/river-creative-technology-dendrites  ;)
> m.
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