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Lot 593W
POULSEN, VALDEMAR. 1869-1942. Poulsen Arc Transmitter, United States, c.1917, 505 x 305 x 380 mm,
5 December 2018, 14:00 EST
New YorkUS$1,000 - US$2,000
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POULSEN, VALDEMAR. 1869-1942.
Poulsen Arc Transmitter, United States, c.1917, 505 x 305 x 380 mm, front panel with microphone, Weston radio frequency Thermo-Ammeter, two female lightbulb connectors, two on/off switches, one selector switch, back with William J. Murdock oscillator transformer coils, steel pipe containing carbon cathode at one end and copper anode at the other, glass reservoir, mica condenser contained in wooden box.
Danish engineer Valdemar Poulsen invented the arc transmitter in 1903. It used an electric arc to convert direct current electricity to radio frequency alternate current. It was used as a radio transmitter until it was replaced by vacuum tube transmitters in the 1920s. The present example uses U.S.-made parts and was likely produced around 1917, the date on the condenser label.
Danish engineer Valdemar Poulsen invented the arc transmitter in 1903. It used an electric arc to convert direct current electricity to radio frequency alternate current. It was used as a radio transmitter until it was replaced by vacuum tube transmitters in the 1920s. The present example uses U.S.-made parts and was likely produced around 1917, the date on the condenser label.



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