Schematics / Thereminator 1
Thereminator 1 by Marc Bareille ,visit his page for more details on this instrument and a demo http://m.bareille.free.fr/thereminator/thereminator.html from the technical details given there :
The Thereminator1 is based on the TECI 67/74, sligthly modified. This schematic come from the "Popular Electronic" article published in 1967.I have replaced all transistors and fets by common european references, the TIS58 is now a BF245... It is a discrete solution. I have used two big air variable capacitors instead of usual miniatures ones.They are for coarse tuning, 2 big buttons on in the middle of the front panel. Small knobs, on each sides, are for fine tuning.
The power supply voltages is a clean +9V DC, a battery will work well too. Antenas are made with 2 bars of plain steel mounted on isolated jacks.The audio output level of the Thereminator1 is very very low ! It require a good guitar amp or a quiet mic/line preamp to drive it....Bandwidth is around 80..100Hz to more than 20kHz.