[sdiy] ASM-1 VCO: Sensitivity of linear FM Inputs?

[Peter Grenader]

I happen to have the first Electronotes volume, and in there is the 258's
waveshape circuit, piece for piece, with a reference that that diagram was
from another publication, I believe EDN, originally published in the mid
sixties sometime.

Made me feel kind of good that Don went there, too.

Knowing this however, I still couldn't get my waveshape control on my 258
clone to work proerly.

sh at t....


spr at spridley.freeserve.co.ukwrote:

> 
>> Don Buchla was an Electronotes subscriber, 258 linear FM is no different
>> than any Electronotes VCO. Though Don may have used a "hotter" bias current
>> since the 258 timing cap is 4700 pF instead of 1000 pF (roughly 2 octave
>> lower than most Bernie Hutchins designs with a 10 uA bias). That may allow a
>> deeper modulation index.
> 
> 
> Didn't the 258 VCO preceed Electronotes by a couple of years?
> 
> 
> SPR
> 
> 
> 
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