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Chaffee quenched spark gap radio transmitter

Chaffee quenched spark gap radio transmitter

Cutting and Washington Radio Corporation
1915-1916
marine auxiliary radio transmitter

marine auxiliary radio transmitter

Telefunken
1908-1914
Radio transmitter, CR 1159 Wave Changer, 600J

Radio transmitter, CR 1159 Wave Changer, 600J

Cruft Laboratory, Harvard University
1915-1930
RCA ET-3619 AM / CW radio transmitter

RCA ET-3619 AM / CW radio transmitter

Radio Corporation of America
circa 1921
ring transmitter with 16 tubes

ring transmitter with 16 tubes

Cruft Laboratory, Harvard University
circa 1930
WE type CW938A radio transmitter-receiver

WE type CW938A radio transmitter-receiver

Western Electric Company
circa 1918
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