[sdiy] Voyager inside pics

[Roy J. Tellason]

On Wednesday 06 July 2005 01:50 pm, Tim Parkhurst wrote:
> Actually, there are analog switches with better specs and higher voltage
> handling capability.

Yeah,  but were there back in 1977?

> http://dkc3.digikey.com/PDF/T052/0420.pdf
>
> http://rocky.digikey.com/WebLib/Analog%20Devices/Web%20Data/ADG201A_202A.pd
>f
>
> You can find more by searching for DG201 and DG211.
>
> They ARE more expensive (of course), but they work very well. It wouldn't
> surprise me at all if these (or something similar) were used in the
> Voyager. Also, did you see all those bypass caps on the digital board? Wow!
>
> Peter, is there a better method than CMOS analog switches? I was thinking
> I'd use one of the commercially available analog multiplexers, but that is
> still (electrically) very similar. Then again, maybe I'm unclear on the
> concept. Nah, that never happens... ;)
>
>
> Tim (better specs) Servo
>
> "Imagination is more important than knowledge." - Albert Einstein
>
> ***************************************************
>
> > -----Original Message-----
> > From: Roy J. Tellason [mailto:rtellason at blazenet.net]
> > Sent: Tuesday, July 05, 2005 8:58 PM
> > To: SynthDIY
> > Subject: Re: [sdiy] Voyager inside pics
> >
> > On Tuesday 05 July 2005 03:54 pm, Peter Grenader wrote:
> > > On top of that, he used CMOS analog switches to inject/record the
> > > pot and switch settings for the whole beast.
> > >
> > > - P
> >
> > Hm.  I thought of doing that back in 1977 or so,  but the parts I was
> > familiar with wouldn't handle a -15 - +15 swing that some controls used...
> >
> > > Tim Parkhurst wrote:
> > > > Anybody wanna see the insides of a Moog Voyager?
> > > >
> > > > http://till-kopper.de/voyager.html
> > > >
> > > > No, it's not mine. None of the boards are removed, but still an
> > > > interesting look inside. Looks like it's ALL through hole. Yipes!
> >
> > I would
> >
> > > > have thought there'd be more SMT in there.
> > > >
> > > >
> > > >
> > > > Tim (yes, I think SMT is neat) Servo
> > > >
> > > > "Imagination is more important than knowledge." - Albert Einstein
> >
> > --
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