[sdiy] 8038 XR2206

[John Mahoney]

At 11:44 PM 7/11/2007, dj hohum wrote:

>Rummaging through my junkbox I was sure I had a 566 or two. Well, I
>have 555, 556,565, and 567, but no 566. My memory is telling me this
>isn't the first time that this has happened.

People mix up the 556 (dual 555) and the rare 566 all the time.


>But, I do have a pair of 8038s, one with a 1.79 price tag from the
>shack!, and a pair of XR-2206s. Looking at the schematics for the
>thomas henry VCO here:
>
>http://electro-music.com/forum/phpbb-files/schem2_161.jpg
>
>It seems that there's no positive power connection? Is this correct?

Yes! The chip runs in reverse. ;-)  Seriously, the power connections 
are Ground and V- instead of V+ and Ground. Thomas credits this 
discovery to John Simonton (originally with the 566, I think).

I believe the 2206 is still in production but the 566 and 8038 are not.

Can't answer the rest of your questions, sorry.
--
john (up too late)


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