[sdiy] discrete VCOs

[Miketina]

Hi there from Australia. 
I have built a bit of synth stuff in the past - I really like the old sounding stuff, the discrete stuff - I don't care if it wonders a little - the best VCO I have ever built was an ARP Axxe style sawtooth VCO which sounded really good but can only do one waveform. There are some great VCOs posted on the web but most of them don't quite have that fat tone.
I am looking for schematics for old discrete synth stuff in particular VCOs. Can anyone help?
Has anyone out there ever built any clones - got PCB designs - schematics - any tips?ARP,MOOG,EMS,etc etc.
Anyone built a Moog 901 or 921 VCO ?
I'm just a sucker for that sound!
Peace
Mike B
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