The Theremin (1953) by Robert Moog. A tube-type theremin. (2.7 Mbyte pdf)
A Transistorized Theremin (1961) by Robert Moog. A transistor version, without power amp or speaker. (3.4 Mbyte pdf)
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This is an area where web archiving of schematics is well-developed. Instead of copying links to the good archive sites, I recommend that you search them directly. Miscellaneous equipment not on the archive sites is listed here:
RCA Theremin (1929) - lots
of information from the "Vintage Components" site.
The Theremin (1953) by Robert Moog. A tube-type theremin. (2.7 Mbyte pdf)
A Transistorized Theremin (1961) by Robert Moog. A transistor version, without power amp or speaker. (3.4 Mbyte pdf)
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Triode Electronics -
lots of information
The Unofficial
Ampeg Page - lots of Ampeg info
The Fender Amp
Field Guide - Fender info
Fender
Heaven - schematics and chassis layouts for Fender amps
Marshall
Heaven - schematics and chassis layouts for Marshall amps
Schematic Heaven - more guitar amp schematics
Ernie
Ball's Music Man Page - schematics for Music Man amps
Traynor Amplifier
Schematic Archive - schematics and some manuals for Traynor
amps
Blue Guitar Schematics
page - lots of guitar amp schematics
