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Cgs synth

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Re: CGS13 Gated Comparator troubleshooting advice . .

2011-06-22 by Adam Scramstad

On Jun 22, 2011, at 12:46 AM, sasami@... wrote:

> >Have you accidentally added the Comp Out into the mixer? It should
> not be
> connected.
>
> Ken
>
No, it doesn't look like it.

On Jun 22, 2011, at 12:47 AM, sasami@... wrote:

> Or is pot 8 properly grounded?
>
The ground wire comes off of pot #8 (non cw leg) and goes to the pcb
ground shown in the diagram.

I wasn't sure where to attach the ground wire from the COMP OUT LED
(on the diagram it says "to LED RETURN") - so I attached it to the
ground that has the "wire strap" on the pcb (near the Q8 out).

For the MANUAL LOOP switch, I followed the diagram and wired one side
of the switch to "Gate 8 Out" - then put a 15k resistor on the center
leg that goes to pin 2 of the LM393 (I used an NTE 943M instead of the
LM393, that's all the shop had in stock) - then the last leg of the
switch went to the same "+VE" on the pcb as the LOOP ENABLE Switch.


- Adam

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