Saturday, October 10, 2015
R.A. Moog 701 Drum Synthesizer - Part 3 (now working...!)
Published on Oct 10, 2015 noddyspuncture
"Now I've had chance to look at these '701 Drum Synthesizers' - and finding not only faulty components but also a 'design fault' ...sorry Bob...:( - I've finally got them working. The problem was a VCA which wouldn't close. It was always 'open' so the unit was just singing away uncontrollably. Neither the filter or either of the two EG's were doing anything. I started by following the hand wired circuit and drawing out a component layout. Then following that, I drew out a schematic and using the schematic I could then fault find. This video is only using the three internal oscillators - one which can be assigned to 'modulate'. There is provision on the rear connector to patch in white, pink and red noise and use those as 'modulators'. That will be the next step... but for now, please enjoy the worlds first ever *working* Moog 701 drum synth video... ;)"
All parts here.
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
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