Oakley Stuff: New circuits

[Tony Allgood]

Hi all,

Just popped the provisional information on two new PCBs to be available
next month. The circuits are up there on the relevant pages in the usual
pdf format.

Basically designed to fit into a MOTM style modular system, the first
one is a pre-amp/envelope follower/gate extractor. This is an improved
version of the control side of my own VCF-1 rack mounted filter.

The second new circuit is my own take on the classic ADSR. This was
originally designed in 1984 by myself and was published in a cruder form
in the ETI magazine. But they got the schematic wrong at the time Doh!.
This time I have also included a VCA. This is based around the 3046 as a
Gilbert Multiplier with predistortion. This was my answer to the tricky
problem of velocity scaling the ADSR output. It works very well, and the
VCA is good enough to be eused on audio too. Thanks to Paul Maddox for
telling me to use this circuit, originally dug up by Chris Crosskey from
who knows where... a Babani publication of some sort. Anyway, here they
are:

www.techrepairs.freeserve.co.uk/follower.htm

www.techrepairs.freeserve.co.uk/adsr.htm

Noise generator, audio mixer and Multi-Mix re-release due in about four
to five weeks.

Regards,

Tony Allgood  Penrith, Cumbria, England

Oakley Modular Synth and TB3030:
www.techrepairs.freeserve.co.uk/projects.htm
My music: www.mp3.com/taklamakan