In sci.electronics.design wrote:
On Sat, 12 Dec 2020 17:54:08 -0000 (UTC), "Don" wrote:

In sci.electronics.design wrote:
On Sat, 12 Dec 2020 07:56:15 -0000 (UTC), "Don" wrote:

Phil Allison wrote:

the Callins is in an epoxy sealed container

Interesting, but it doesn't answer my question:

Why was the circuit designed to use a Callins in C7?

Was it designed that way?

That circuit was barely designed at all. What's it supposed to do?

Your question restates the gist of this thread.

How can you know the circuit was barely designed at all if you don't
even know what's it supposed to do?

Because it's full of trimpots and selected values. It was probably
futzed until it worked. What's it supposed to do?

It's the VCO module from an old synthesizer. It has three triangles on
its face-plate and it's right above the left hand side of the keyboard
in the first image shown he

http://www.johnnypumphandle.com/johnny/Paia/paia.htm

Danke,

--
Don, KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.