A Utah Radio UAT-2 Modulator

Original UAT Manual and Schematics
Original UAT Manual
Original UAT-2 Modulator Schematic

Documents
QST-June 1936 (pg.11)
Short Wave & Television-October 1937 (Pg.297)
1939 ARRL Handbook Modulator Power Supply Schematic
1939 ARRL Handbook Modulator Schematic
My Power Supply Schematic
My Audio Deck Schematic
Thordarson Modulator Spec Sheet