Cgs synth

>Hi,
>
>i have a slight issue with 'CV Cluster' and the frontpanel i got.
>I have pots:
>
>- BASE1
>- BASE2
>-CV MOD1
>-CV MOD2
>
>and jacks:
>
>- BASE 1 / BASE 2
>- CV MOD 1 / CV MOD 2
>- DOWN 1 to 4
>- BOTTOM
>- TOP
>- UP 4-1
>
>do i need 2 x CGS37 ? or can this accomplished with one ?
>
>Thanks for any help
>
>
>--jan
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>

> It looks like it's set up for a single unit, but with extra mixers
> at the
> input. (e.g. a pair of CGS04)
>

> -----Original Message-----
> From: cgs_synth@yahoogroups.com [mailto:cgs_synth@yahoogroups.com] On
> Behalf Of sasami@...
> Sent: Monday, February 12, 2007 8:26 PM
> To: cgs_synth@yahoogroups.com
> Subject: Re: [cgs_synth] question regarding CGS37
>
>
> >
> >Well. Do you have more details regarding on how the wiring would be
> >correct ?
>
> See the person who designed the panel - not me.
>
> Ken
>
> _______________________________________________________________________
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>
>

> I think that was Jeff Pontius's panel - no longer with us.
>
> It is a single CV Cluster.
>
> You can add the second Base and CV input by adding 100K resistors in
> parallel to the ones for the single Base and CV input. These go to
> op amp
> summing nodes so no extra mixer needed.
>

> -----Original Message-----
> From: cgs_synth@yahoogroups.com [mailto:cgs_synth@yahoogroups.com] On
> Behalf Of sasami@...
> Sent: Tuesday, February 13, 2007 1:25 PM
> To: cgs_synth@yahoogroups.com
> Subject: Re: [cgs_synth] question regarding CGS37
>
>
> >Okay, so let me try to get it right (and i surely will write a more
> >detailed information on my page
> >for all the others who have a similar design:
> >
> >BASE1 jack goes to THRU jack then to BASE 1 pot right. middle BASE1
> >pot to IN pad on the pcb.
>
> Base 1 pot CCW end goes to 0V as well. This is so the pot forms a voltage
> divider. Normally the F connection goes to the through jack, so it
> accurately follows the input. Adding the pot messes thing up, so we will
> save the trhu function for the BASE2 input. So no connection to thru here.
>
> >BASE2 jack goes to THRU jack then to BASE 2 pot right, middle base 1
> >pot to 100k ohms resistor, then to
> >IN pad on PCB.
>
> No. Base 2 jack goes to a 100k resistor (ordinary resistor) and the thru
> jack. The other end of the resistor goes to pin 2 of the first chip.
> Note: Base 2 is a direct input. The pot does not affect it.
>
> >The same applies to CV mod 1/2.
>
> The CV MOD 1 is wired to a pot in much the same way.
> The CV MOD 2 is wired to two normal 100k resistors. The other end of one
> resistor goes to pin 13 of the first chip. The other end of the second
> resistor goes to pin 6 of the first chip.
>
> >2) My assumption for the other pads (please tell me if i'm right:)
>
> The top half is upside down.
>
> >S/T pads are for the connection to EVEN/ODD SPDT
> Correct.
>
> Corrected:
> >pad A - TOP
> >pad B - UP4
> >pad C - UP3
> >pad D - UP2
> >pad E - UP1
> >pad F - Not used this time.
> >pad K - DOWN1
> >pad J - DOWN2
> >pad I - DOWN3
> >pad G - DOWN4
> >PAD H - BOTTOM
>
>
> Ken
> _______________________________________________________________________
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>

> Correcting:
>
> Base 1 and 2 are identical. Both have input jacks, thru jacks, and
> pots.
>
> Pot tab designations assume the pot is oriented so the tabs are on
> top, and
> looking from the back of the pot.
>
> Base 1 input jack to Base 1 thru jack to Base 1 pot left tab (CCW)
> Base 1 pot middle tab to IN on PCB, 100K resistor.
> Base 1 pot right tab to ground.
>
> Base 2 is identical, except you need to add an extra 100K resistor
> that
> isn't on the PCB. It solders to Base 2 pot middle tab on one end,
> and to
> IC1 pin 2 (the summing node) on the other.
>
> Use the same concept for the CV MOD 1 & 2. The extra 100K resistor
> for CV
> MOD2 solders to IC1 pin 13.
>