Yes, one to be added to the library for some of my students.
Andy
Fascinating. A more recent work is the book, "Electronic Musical Instruments" by Richard H. Dorf (developer of the Schober electronic kit organs); this book covers some of the same ground as the above article, but continues on from there into the designs of the 1960s.
David
Thanks for the info, David. Found one used on amazon, so have ordered it out of interest.
The most recent technology in that book is a discussion of the vacuum tube "Concert" model sold as kits by Schober, a model that was eventually supplanted in the Schober line by the "Recital" model (powered by discrete transistor circuits). I have a Recital model I assembled in the 1960s, but it is currently inoperative. I'm in the middle of modifications to the tone generation system to marry a crystal oscillator and Top Octave Synthesizer chip into the original 12 generator boards that provide the 7 levels of octave division and wave-shaping. I'm a great procrastinator and I have a power supply problem, I think....