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.comSent: 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.comJealous 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
> >
> >
> >
>
>
>