[sdiy] What I'm up to

[patchell]

Tim Ressel wrote:

> To Whoever Cares:
>
> Life is a roller-coaster. How our hobbies do suffer
> the altitude changes. I thought I had a bunch of cash
> to spend on nifty things like a PCB for the Walsh
> chips. It turns out that the windfall amount exactly
> matches my tax bill. So Uncle Sam gets my hobby
> budget.

    It seems to be going around...I am hoping to at least temporaily
solve my cash flow problems this week, although, I heard a rumor that
the company that is a major customer of the one I am signing with is
laying of a whole bunch of people...so the uncertainty continues.

>
>
> Sigh.
>
> Meanwhile, since I am not currently on speaking terms
> with my midi2cv project, I decided to whip out my VCO
> prototype and play with it. After fixing a broken wire
> I tries to calibrate it. Not as easy as it sounds. The
> thing is not really linear. I used the VCO design from
> Chamberlin.

    The basic part of the VCO is actually pretty good (this is basically
the same VCO core as as the ASM-1).  I have been messing around with
this circuit quite a bit.  Although, it is mostly to test the various
designs I am trying for NO-TEMPCO exponential converters.  With a CA3046
for the expoconverter, I have been getting conformity of about +/- 2
cents.

    I have never tried the expo converter that is in the Chaimberlin
book (exactly as drawn...it is a pretty standard one).

>
>
> Maybe I'll take up Taxidermy instead.
>
> --TR
>
> __________________________________________________
> Do You Yahoo!?
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> http://taxes.yahoo.com/

--
 -Jim
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* Visit:http://www.silcom.com/~patchell/
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*I'm sure glad Merry Christmas comes just once a year
* -Yogi Yorgensen
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