H.M. Stationery Office, 1947 18,5 x 25, 500 pp., nbreuses figures et planches, cartonnage, Bon état - pagination estimée, 9ème tirage
Reference : 50580
the spark transmitter/ thermionic valves - reception of electromagnetics waves/ amplification, receiver design - power supplies/ valve transmitters - radio-telephony, sound reproduction/ propagation of electromagnetic waves/ aerials, feeders, directional
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