[sdiy] Milton as VC Harmonic Generator "A Simple Blaster"

[Michael Zacherl]

Hi again,

Cynthia Webster wrote:

>  That's true if all the knobs are turned down,
> but turning any of these even a small amount results in a tone, (and a
> sawtooth waveform on the scope with a somewhat instant rise time, and
> the typical sawtooth linearly sloped decay).
> 
> Oddly, any of the knobs do this except the very first knob for some reason?
> which is silent when it is the only one turned up

I don't know the circuit, but maybe something like resettime respective 
status of levels etc. comes into play when looping?

For the other steps it shouldn't make any difference if you turn up a 
single pot at step 3 or 7 or 13 (just to name something)?

> Very sharp spikes!  Turning a few knobs quickly results in steep
> "mountain range" type waveform variations, as well as ever increasing
> amplitude.  I have to add a negative bias voltage from a processor /
> mixer in order to keep the waveform centered on the scope.

Hmm .. IMHO that would justify an "AC/DC switch" at the bank output.
But IIRC Milton doesn't speak negative voltages, does he?

>>hey ho - and now picture two quintuple Miltons ... (errm ... if only my
>>ordered PCBs would finally arrive ;-)
> 
> When they do, take your time and be real methodical when constructing them.
> These babies are diabolically complex, but the results are worth the effort!

Hmm ... I certainly will! Currently I'm trying to figure how to squeeze 
bigger knobs into this 0.8" grid of pots. ;-)

    Michael.