Vintage Synth Repair

Thanks for everyone's help on this.  I've figured out the connector and everything works except the S&H module.  I gave up on ever trying to find another or de-pot it to troubleshoot it.  I just designed a new module with a National LM398A S&H chip and built it on a small board with pins to fit in the original location.  I had to fly the CV output and a Gate input to the board.  Works great.  Now I'm waiting for the new bushings from Arcsound.  Should have this thing put back together and functional.  Thanks again for all the suggestions.

Dave

--- In vintagesynthrepair@y..., "djbrow54" <davebr@e...> wrote:
> My real issue is the CV output.  It's fine up until the input to the
> potted module on the circuit board.  It's a Dynamic Measurements Corp
> 148-130 module.  It's pulling the CV negative.  I've removed the
> module and am running the CV straight from the input.  The keyboard
> divider chain is working fine except there is no hold function for
> the CV.  Funny, there is no gate input to this module so I don't know
> how it's supposed to know when to hold the voltage.
> 
> Does anyone have schematics for this keyboard or any information on
> the Dynamic Measurements Corp module?  It's got a date code of '74 on
> the bottom.  I'm trying to unpot it but it's not going very well.