1918 IP-500 (aka SE-143)
US Navy Radio Receiver

IP-500 in radio lab
Wireless research laboratory, Washington, DC, c.1919
IP-500 in radio lab
Wireless shack of radio historian Harold S. Greenwood, W6MEA


IP-500 front panel
SE-143 (no ID plate) -- tuning range: 44kHz to 1000kHz (varies) -- dimensions: 23"w x 14"h x 11"d -- weight: 40 lb. -- price in 1920: $595


Schematic of SE-143
IP-500 / SE-143 radio receiver schematic

IP500 interior
IP500 interior
IP500 interior
IP500 interior
IP500 interior
IP500 interior

related references:

"Battleship Type Receiver," RADIO AMATEUR NEWS, August 1919, p.56-57
George E. Sterling, THE RADIO MANUAL, 1928 (1st edition), p.467-471
ROBISON'S MANUAL OF RADIO TELEGRAPHY AND TELEPHONY, 1919, p.161-169
L.A. Gebhard, EVOLUTION OF NAVAL RADIO-ELECTRONICS . . . , 1979, p.18-19
L.C.F. Horle, "Navy Receiving Equipment, Pt.1," QST, July 1920, p.12-17
L.C.F. Horle, "Navy Receiving Equipment, Pt.2," QST, August 1920, p.8-10
RADIOLA, THE GOLDEN AGE OF RCA, 2007, p.116-123, p.403
RCA, RADIO APPARATUS . . . , 1921, [one page ad], price $595
Will Jensby, "The History of Navy Radio Equipment, II," ARC, Feb. 1992, p.4-8

Radio Receiver Used on the USS George Washington During
President Wilson's Trip to France for Peace Negotiations,
(Collections of the Henry Ford Museum), 1919

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