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Mignon RC2 Radio Tuner from 1915Mignon RC2 Radio Tuner from 1915. Ernest C. Mignon first emigrated to the US in 1910. I… | Antique radio, Crystal set, Vintage radio
![Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 | Science Museum Group Collection Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/263/820/medium_1935_0618__0001_.jpg)
Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 | Science Museum Group Collection
![Radio Equipment, Transmitters Aircraft radio telephony transmitter (transmetteur radio telephonique ou radiotelephonique ou radio-telephonique), 1915 by Radio Equipment, Transmitters Aircraft radio telephony transmitter (transmetteur radio telephonique ou radiotelephonique ou radio-telephonique), 1915 by](https://images-cdn.bridgemanimages.com/api/1.0/image/600wm.UIG.92227050.7055475/5069050.jpg)
Radio Equipment, Transmitters Aircraft radio telephony transmitter (transmetteur radio telephonique ou radiotelephonique ou radio-telephonique), 1915 by
![Bell telephone magazine . Fig. 6. One of the First 5000 Watt, W.vter-Cooled Transmitters Used in Station Wf.af in 1924.. Fig. 7. Powertul Water-Cooled Radio Telephone Amplifier Installed in 1922 at Bell telephone magazine . Fig. 6. One of the First 5000 Watt, W.vter-Cooled Transmitters Used in Station Wf.af in 1924.. Fig. 7. Powertul Water-Cooled Radio Telephone Amplifier Installed in 1922 at](https://l450v.alamy.com/450v/2crxg84/bell-telephone-magazine-fig-6-one-of-the-first-5000-watt-wvter-cooled-transmitters-used-in-station-wfaf-in-1924-fig-7-powertul-water-cooled-radio-telephone-amplifier-installed-in-1922-at-rocky-point-l-ifor-transatlantic-experiments-which-culminated-in-commercial-service-in-1927-radio-telegraphy-sparksarcsetc-tuned-circuits-antennas-physical-8-chemical-scienceelectrons-thermionics-arlington-long-distance-tests1915-war-time-developments-2crxg84.jpg)