Mechanical Television
Western Model 41
Here are photos taken off the screen of a Model 41 in 1933 and a Installation and Operation Manual. Here is a Popular Science article about lens disk sets.
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Tubes are 3 - 58s (TRF amps), 56 (Detector), 3 -227s (Audio amps), 45 (Output) and 80 (Rectifier). The socket for the crater lamp is shown in the picture on the lower left). The receiver tunes 1.5-3 mHz.
Courtesy of Don Hauff