Musical Engineer's Handbook VCO - Missing Parts

[Dan Higdon]

> I'm trying to build the VCO in the musical engineer's handbook (ch 5b,
> p24,25) by Bernie Hutchins, 1975.  I can't seem to track down a CA3080 or an
> AD821.  If anyone knows what I could use instead, It'd be appreciated...

CA3080's should be pretty easy to find.  You can't get them at Radio Shack, but
they're available from most any other place.  You pretty much have to use that part.
I'd buy a couple of them - they're VERY popular in circuits of that era.

The AD821 is a bit more problematic. :-)  IIRC, it's a dual matched transistor pack.
You can actually use standard transistors there (two, naturally) just so long as you
match the type (PNP or NPN, I don't remember).  The 2n3906 and 2n3904 are popular
and very easy to find.

hdan