AW: AW: [Re: thermal tips re expo converters:]

[Steve Varner]

OK folks...my brain hurts now, thank you very much...
So, if I'm using a ribbon controller or a theramin controller or something, I
shouldn't worry about any of this. Right? It seems some of you are saying that
isolation has cons as well as pros. My plan was to try to avoid temperature
compensation because of the tempco resistor's cost and hard-to-find nature. If
I'm not getting much benefit from isolation because of cooling and/or loop
problems, I'll just leave it off and heat the chip sans styrofoam. Again, any
2K tempcos for sale?  :-0

SV


Haible Juergen wrote:

>         > Is this the way Moog did it with osc. and filter drivers?
>
> I think so.
>
>         > For other controllers then keyboards, like continuous sources the
>         > exponential scaling is necessary, because higher notes would have
>         > different resolution the lower.
>
> Depends on what you want. The CS80 ribbon is linear, and highly useful.
> People like it because it goes down below audio range.
> What you obviously have in mind are continuous sources with equally spaced
> semitones (to stay with the pich ribbon example). This has it's benefits for
> sure,
> but my point is that you don't normally need precise temperature
> compensation
> on such sources. If the controller is "fretless" (in a generalized sense),
> you
> will find the right pitch by ear and little position adjustments of your
> fingers anyway.
> You can do all this with the MS-20 oscillator scheme without the need of
> tempco resistors.
>
> JH.