303 clone filter and VCO

[Dr. Jörg Schmitz]

I've not build one yet. But there are two main things (if i'm not wrong)
which makes the sound unique :

1. The SAW VCO doesn't really produce saw, but a spaced saw (with
a very littl space, but you hear it)

2.) Most important : the filter is built up by a moog ladder, BUT :
    the transistors are NOT selected !!!! This makes it 18 dB, not 24.
    This also leads to the phenomenon, that each TB303 sounds a bit 
    different. So, use unselected transistors, but change some of them
    and hear, how it sounds. 

I don't know if the VCA is linear or log. 

J.S.
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