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3A Communo-Phone

Country:  United States of America (USA)
Manufacturer / Brand:  Bogen, David Co., Inc.; New York (NY)
Year: 1937 Category: Audio Amplifier or -mixer
Valves / Tubes 3: 6C8 43 25Z5
Main principle Audio-Amplification
Wave bands - without
Power type and voltage AC/DC-set / 115 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
from Model: 3A Communo-Phone - Bogen, David Co., Inc.; New
Notes Selective Intercom system with one master and 4 passive remote units.
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 8 = 1937 and before

All listed radios etc. from Bogen, David Co., Inc.; New York (NY)
Here you find 207 models, 183 with images and 132 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.