Modular Synth Panels

Awesome! I really need to start searching for stuff in the mouser catalog vs. the search function on their website..... I spent at least an hour last night searching for dual gang pots, and the 31VW405-F that you just identified never showed up. *sigh* I'm catching on, slowly.

-Jim

----- Original Message ----
From: Scott Deyo <contact@...>
To: ModularSynthPanels@yahoogroups.com
Sent: Wednesday, May 21, 2008 8:33:42 AM
Subject: Re: [ModularSynthPanels] Bridechamber CGS SubOsc

The Alphas will fit:
31VW405-F

Scott Deyo
The Bridechamber
contact@...
http://www.bridechamber.com
Jealous Edison Record Kompany
http://www.jealousedison.com


On May 21, 2008, at 1:04 AM, James Elliott wrote:

> Scott, you wrote in the email below:
>  "Does that make sense? I know it's confusing. If you want, I can start
>  building mine now too and take some pics.
>  It's a very cool module, though. I added all the things I wish my
>  original had."
>
>  That would be awesome if you could start building this thing. My 
> board is stuffed and now I'm trying to figure out how to wire it to 
> the panel.....
>
>  Also, you mentioned a 100k dual ganged pot, 531-pc16dc-100k, do you 
> know of any 50k dual ganged pots? Ken mentioned in his new forum @ 
> electro-music.com that 100k pots installed with 47k resistors and the 
> 22k resistor will result in a log type response - and that in order to 
> achieve a linear response one would have to use 100k resistors and a 
> 47k resistor instead. Well.... I've already stuffed my board, and I've 
> had extremely bad luck in the past unsoldering components on the CGS 
> boards (my solder sucker lifts solder pads off CGS boards), so I would 
> prefer to use the 50k resistors if you know of any, If not, I can live 
> with it.
>
>  Thanks,
>  Jim
>
>  ----- Original Message ----
>  From: Scott Deyo <contact@...>
>  To: ModularSynthPanels@yahoogroups.com
>  Sent: Tuesday, April 1, 2008 5:01:10 PM
>  Subject: Re: [ModularSynthPanels] Bridechamber CGS SubOsc
>
>  Hey Mike,
>
>  I haven't gotten to mine yet, but here's the plan:
>
>  Use dual 100k or dual 50k lin pots.
>  You'll need two CV Mixer PCBs.
>
>  The different divisions from the PCB go first to the pots. Use a
>  system, like "higher division goes to upper lugs of pot". All those
>  pots are attenuators.
>  Let's do an example Alt Group of pots. You'll have six of these 
> groups.
>  The Alt Group A, A/2, A/4, A/8 is wired together via 47k resistors to
>  the bottom lug of that Alt Switch, so when you throw the switch up, 
> you
>  will get this Alt Group (the upper group) of divisions.
>  Alt Group A/6, A/16, A/32, A/64 is wired the same way to the top lug 
> of
>  the Alt Switch.
>  The middle lug of the switch goes to any pad on the mixer (there are
>  three mixers -- two external and one on the SubOsc PCB) at pin 2 of 
> the
>  TL072 (past the summing resistors, which we used up on the panel.)
>  This is cool, because it allows up to switch between useful audio
>  divisions and control/ clock divisions for each channel, 
> independently.
>
>  The inversion of each group on the external mixers is from pin 1 of 
> the
>  TL072, via a 1k resistor, just like it's done on the mixer of the
>  SubOsc PCB.
>
>  Mixer one is just channel A.
>  Mixer two is just channel B.
>  Mixer three is the multiplications and such.
>  The Mix switches are easy -- For Mix A, just take the output of 
> channel
>  A to the outside lug, and the middle lug to the summing node for the
>  Mixed channel Mixer. Do the same for the Mix B switch.
>  Those switches make the Mix Output more versatile. With both switches
>  off, you just get the multiplication on the Mix Out. But if you're
>  going for super-super tone hugeness of the universe, turn it all on! :
>  )
>
>  Does that make sense? I know it's confusing. If you want, I can start
>  building mine now too and take some pics.
>  It's a very cool module, though. I added all the things I wish my
>  original had.
>
>  Cheers,
>  Scott Deyo
>  The Bridechamber
> contact@...
> http://www.bridechamber.com
>
>  On Apr 1, 2008, at 3:41 PM, clickmrmike wrote:
>
>  > So Scott, exactly how have you wired your version of the CGS SubOsc?
>  > The panel is cool, but I don't completely grok the switched pot
>  > layout.
>  >
>  > Thanks,
>  > mrmike
>  >
>  >
>  >
>
>  
>