Television Broadcasts

Radio Record, Volume III, Issue 33, 28 February 1930, Page 2

Television Broadcasts

New American Station

C. FRANCIS JENKINS, the well known American television expert, has seen the fruits of his lebours brought to a suecessful conclusion with the opening of his own high-power television broadcasting station. The station, the first of its kind so far as its power is concerned, is located at Washington, and broadcasts visual images on a wavelength of 103.4 metres with a power of 5 kilowatts. The aerial system is supported betiveen two lattice steel masts each 128 ft. high, spaced 200 ft. apart, and is of the cage type with a counterpoi earth syStem. Se The station is actually functioning at'the present time with a daily schedule, transmissions being given between the hours of 8 p.m. and 9 p.m. Moving pictures are broadcast by means of the Jenkins systeni. The whole station and studio are housed in a building of the bungalow type. In the studio there is a motion-picture projector with itS film reels, together with the usual television scanning dists, photoelectric cell equipment, and radio amplifier. The last is employed for the purpose of magnifying up the feeble electric impulses produced by the photo-eélectric cell from the light variations falling on it from the moving film. In the adjoining room is located the actual radio transmitter, which is cap-, able of dissipating 5,000 watts. Its > design is slightly different from the ordinary broadcast transmitter in that special care hag been taken to meéet the particular requirements desired for the faithful transmission of images on carrier waves as compared with those netessary for sound transmissions. A 5-kilowatt water-cooled valve is employed for generating the wireless waves, and ic is anticipated that with this valve signals will be received over the whole of the eastern half of the United States. The first broadcast establishing this new service was the transmission of a silhouette showing a small girl bouncing a ball. Apparently this scene depicted a romantic side of Jenkins’ work in that this was one of his first efforts in connection with the television art. This was followed by a long film entitled "Call It Love." A. further studio is being erected at. the station, whence it is hoped tag by means of his latest apparatus, likeness of living objects will be able to be broadcast.