overall: 13 1/8 in x 11 5/8 in x 8 3/4 in; 33.3375 cm x 29.5275 cm x 22.225 cm
Object Name:
Amplifier/Detector
radio receiver
Other Terms:
Amplifier/Detector; Radio
Date made:
1918
Associated date:
1918
Description (Brief):
Marked: "Control box for detector, oscillator and amplifier Audion type, Made for Bureau of Steam Engineering by De Forest Radio Tel & Tel Co., NY. Req. #1310. Cont. #35491. Date 1918. A battery volts: 6; B battery volts: .25[?]; Fil. Current: .2-.9 Class _____. Serial No. 521". On meter: "1.5-0-1.5 amp scale. Pat. 6/1/15; Ser No 30246. Made by Splitdorf Elec. Co., Newark, N.J." Specimen employs a single triode vacuum tube in a circuit which can be adjusted for use as a detector, oscillator, or amplifier. This model was superceded by the SE1071 (see EM.320729). Panel has a function switch for the desired mode of operation, also a 10-tap bridging condenser and stopping condenser, a meter calibrated to 1.5 amps, filament current and B voltage rheostats, an edge type meter with 0-10 calibration, corrugated insulators with binding posts for headphones, B battery, 125 volt line, A battery, and tickler. Reference: Navy type numbers, 1918, page 7. (Clark Collection); U.S. Navy: Audion Control Box 122-A, Instructions. (Clark Collection: Class 50- book 2, Detectors).