[sdiy] Micromoog from hell!

[Scott Bernardi]

I've used both the CEM3340 and the dual CEM3374. The thing about the CEM3374 is
that is doesn't have the whole temperature compensation built in - you have to
either use tempco resistors, or a multiplier to multiply the control voltage by
a temperature dependent voltage that is available on one of the pins.
See http://home.attbi.com/~sbernardi/elec/og2/og2_cem3374.html for a circuit for
CEM3374 (uses tempco resistors)

David D wrote:

> >  actually, replacing the psu in the multi/micro can be a great
> >improvement...I replaced a crippled psu in a multi with your standard 78/79
> >regulator psu, it worked a treat!
>
> Right on!  Also another great improvement that is pretty cheap is to replace
> all the trim pots with multi-turns. I dont know about you but every
> Micro/Multi Ive ever had on the bench has stood right to attention whenever
> Ive done this as the trim pots moog used where kinda cheap and by now are
> shot and can make testing/trimming them a nightmare!
>
>   Gonna add two more VCO's to my personal MicroMoog in the near future-
> should I use two CEM3340's or one CEM3374?? Anyone?
>
> Best-
>
>    DavidD
>
> "The Jupiter 8 is sex in orange and silver"
>
>            Nick Rhodes - Duran Duran
>
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--
Scott Bernardi
sbernardi at attbi.com