ARP synth modules (4027-1)

[Mike Granger]

Dana,

Hope this is not too intrusive, but would you know where I could get a working
4027-1 VCO module? I thought about trying to build a clone to install in a home
built synth I built way back in 1973. Had three of these great VCO's and one
died a few weeks ago.

Did you work for/at ARP Tonus?

I am a great admirer of all their products. Used to do service on them, but was
never fortunate enough to own a real one.

Thanks for your help, or at least for reading this.

Sincerely,

Mike Granger

Dana Scott wrote:

> Yes, ARP used the 3086's because they were cheaper.
> We used 3086's all over the place, on nearly every product, from 2600 VCO's
> to AXXE VCA's. I vaguely recall seeing 3046's in a couple of production
> runs, substituted in when the 3086's were not available.  As for the phaser,
> it warms my heart to know that people are still building it.
> -Dana Scott
>
> >
> > I have used the 3086 because they were cheaper, and I guess that's why ARP
> > originally used them as well. I have not tried, but I see no reason why
> > 3046 shouldn't work - *any* fairly selected transistor pair should work !
> >
> >