Vintage Synth Repair

I just finished repairing a SCI Model 700 Programmer first version. There is some information on the Rev 1 version but I could find no information on this first version. I created a web page with some documentation, photos, and scope and logic analyzer waveforms. Hopefully it can help someone else working on theirs.

http://modularsynthesis.com/SCI/700/m700.htm

I was unaware of these units until I got this one - it's got some nice features.

Dave

modularsynthesis.com

thanks Dave  Useful to me.

I have a mark Ii and some user manuals in pdf.  The manual includes the sci hack for  a minimoog for arp gate, and 3 independent vco inputs.  Using cascading switch jacks I can do these combinations 1=al VCOs, 1=VCO1 & 2=VCO2+VCO3, 1=1VCO, 2=2VCO, 3=3VCO independent

 

LOrne in Canada

From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of davebr@...
Sent: October-28-13 7:20 PM
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] Sequential Circuits Model 700 Programmer page

 

  

I just finished repairing a SCI Model 700 Programmer first version.  There is some information on the Rev 1 version but I could find no information on this first version.  I created a web page with some documentation, photos, and scope and logic analyzer waveforms.  Hopefully it can help someone else working on theirs.

 

http://modularsynthesis.com/SCI/700/m700.htm

 

I was unaware of these units until I got this one - it's got some nice features.


Dave

modularsynthesis.com

Hey Terje,

Have you found a pot that is close but that has straight legs? If so, you could bend them and/or solder on extensions. I've done that with pots on Electro Harmonixs pedals.

best,

DT

--- In vintagesynthrepair@yahoogroups.com, Terje Winther <terje.winther@...> wrote:
>
> Hi all,
> I am repairing a Jupiter-8, and the VCO 1/2 balance pot is broken.
> It is an Alps 10KB pot, PCB mount with a 90 degrees bend on the legs.
> The shaft is the split type, and shaft length is 20 mm.
> I have tried a lot of places, but the specific type needed is not to
> be found.
> Does anyone have a spare, or know where I might get one?
>
> Terje Winther
> terje.winther@...
> http://wintherstormer.no/
>
Have you tried searching the ALPS site for the right part (make sure you look for Log (Aud) or Lin as appropriate) and come up with a close match?

http://www.alps.com/WebObjects/catalog.woa/E/HTML/Potentiometer/RotaryPotentiometers/RotaryPotentiometers_list1.html

Whilst you may arrive at an exact match there's no guarantee anyone's ever ordered that specific part and hence you may not find a stockist.

Another manufacturer you may care to try is Alpha Potentiometers, they may do something similar.

http://www.alphapotentiometers.net/index.html

I've just had very similar issues trying to replace a 10k ALPS pot in a volume pedal with one of another value and ended up with another make altogether.

Stockists you could try are Mouser (USA/Worldwide), Farnell (UK/Worldwide), Elfa in Sweden.

Happy hunting.