[sdiy] ASM-1 type VCO freq. range

[Gene Stopp]

The VCO used in the ASM-1 (designed by Terry Michaels, originally published
in Electronotes back in the 70's, built with modern parts today) is by far
the widest range DIY VCO I've seen, which is why I picked it in the first
place :)  It will go from one cycle every few seconds to over 50 Khz in one
CV sweep. The waveforms are preserved quite nicely all the way if you use
fast op-amps. The TL-082 works fine at the very least to above 20 Khz. 

Best Regards,

- Gene


-----Original Message-----
From: Henri Kovalainen [mailto:hekovala at kovalainen.fi]
Sent: Friday, January 25, 2002 2:01 PM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] ASM-1 type VCO freq. range


And now for something completely different...

I'm also trying to decide what design I should use as the basis of a new
bank of VCOs for my modular. There's plenty of info about the ASM and its
VCOs but I haven't found anything about the frequency range people have
achieved with the design. I mean, the range on which the wave forms are
still roughly what they should be.

Thanks in advance.

| henri kovalainen   | peltokatu 19 b51   | hekovala at kovalainen.fi
| phone: 0400-683750   90120 oulu finland   hekovala at paju.oulu.fi

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