"Since the Time Machine (and possibly the Dark Star by now) are
not currently available,....."
--If there is any good news here, it looks like we have found some ICs
for the TM. The DSC will be back as a new and improved module based on
newer ICs. It may not sound quite the same, but the concept will be
similar. Voltage control of the VCO frequency will be 1V/Oct for your
convenience.
Regards,
___________________
John Blacet
Blacet Research
http://www.blacet.com