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Pedal: H 273 x W 525 x D 234mm weight 9.8 kg
Microphone: weight 0.2 kg
TRANSCEIVER / No 484 TYPE 40 / MANUFACTURED BY / A.H TRAEGER / UNDER LICENCED OF / PHILIPS LAMPS AUSTRALIA LTD
0...3 [volts] / VOLTS D.C / MASTER INST'S PTY LTD MODEL R 212 / SYDNEY No A 22487
[15 other dials used to alter the volume, wavelengths etc]
After an outback tour of duty, Traeger began work in Adelaide on a transceiver for the Flying Doctor network. The sets had to be cheap, durable, small and easy to operate. Using bicycle pedals to drive the generator, he found that a person could comfortably achieve 20 watts at a pressure of about 300 volts. His famous pedal wireless was actually a pedal-operated generator which provided power for a transceiver.
Once the first pedal sets had been introduced in Queensland in 1929, the invention created a communications revolution by diminishing the loneliness of the inland environment. In 1933 Alfred invented a Morse typewriter keyboard, an accessory to the pedal sets which was widely used until the advent of radio telephony. In 1939 Traeger's set adopted a vibrator unit and no longer used pedals.
Uploaded to the Web 27 May 2011.