On a bit of a whim I built this VCO. I think I have the full house of Thomas Henry VCO's now! This is the last of XR, VCO1, 21C (or LM), X-4046 & the 555. Thomas has always been amazingly adept at getting various VCO devices to perform for a synth environment. This is the 8038 VCO that is from his VCO Cookbook. I bought the chip about 4 years ago but the book has only recently became available again. This is the layout from Fonik's web site but I only built one channel. It roared into life immediately but I think it will need more tweeking as the sinewave is a bit skewed...
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