Image 36343 from Feb. 15, 1919, shows an airplane radio telephone receiving set SCR-91, which utilizes VT-I tubes. The set includes various components such as a length switch, tickler, antenna, primary and secondary circuits, ventilators, tube HT play, rubber cushion, condenser, protector socket, amplifier socket, and series parallel switch.

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Size: 8555px × 5745px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, 15, 1919, 2--res, 4r, 53-, 8c, activities, aircraft, airplane, american, amplifier, antenna, box, cond, cushion, div, feb, ht, length, military, official, parallel, photographer, photographs, play, primary, protector, radio, receiving, rubber, scr-91, secondary, series, set, socket, switch, telephone, tickler, trema, tube, tubes, ventilators, vt-, war, world