Broadcasting Telecasting (Apr-Jun 1963)

vent broadcast pick-up from other bands. Transmission to other receivers in the area is prevented by the fact that the power output of the transmitter is only 1.5 milliwatts. Technical topics... Obstruction lights ■ Rohn Manufacturing Co., Peoria, 111., manufacturer of communication towers and accessories, is now offering a complete line of obstruction lights and beacons for tv, microwave and transmission line towers, or other structures where required. Designated Rohn B-l 300 MM Code Beacon, the equipment is manufactured, according to the firm, to meet complete FAA and FCC specifications. To make color tv ■ International Electrohome Inc., Chicago, subsidiary of Dominion Electrohome Industries Inc. of Canada, plans to introduce its own new line of color tv sets in U. S. market this summer. Sets will use RCA's color tube. Canada presently does not have color tv broadcasting. IGM signs rep « International Good Music Inc., Bellingham, Wash., has signed Tele-Measurements Inc.. Liv ingston, N. J., as its eastern representative for IGM radio automation equipment. Tele-Measurements will sell IGM program services and Simplimation equipment in the 1 1 state area from Maine to Virginia. Portable power pack ■ Terado Corp., St. Paul, Minn., has announced production of a new portable power unit, CinePower #25, which can be used as a power supply for 110 volt AC cameras in the field. CinePower #25, which weighs 12 pounds and comes in a leather case with a shoulder strap, generates its power with self-contained 9 volt lantern batteries. Price is $79.50. Monaural to stereo ■ Gray Research & Development Co., Newington, Conn., has introduced a new passive record equalizer for stereo and monaural discs, flexibly designed to permit broadcast stations to install new stereo facilities, to convert existing monaural facilities to stereo, or simply to improve existing monaural performance. Called the 604M/S, the new equalizer is priced at S 137.50. Complete technical specifications are available from the company, Box 12. Elmwood, Conn. 16-inch color set ■ Tokyo Shibaura Electric Co. (Toshiba) introduced a new color television receiver using a 16inch rectangular picture tube at the IEEE show at the New York Coliseum in New York, March 25-28. The television sets reportedly will not be introduced for sale in the U. S. this year. Log series antenna ■ Prodelin Inc., Hightstown, N. J., has introduced a low-cost new antenna series for base station services in the 150 and 450 mc bands with gains up to 10 db. The antenna is built around a basic unit which employs a background wave log periodic structure providing it with gain and impedance essentially constant. Shu re mike ■ Shure Brothers Inc., Evanston, 111., is distributing a new dual impedance microphone, specifically designed for lavalier use. Also useful as a hand mike, the model 560 unit weighs 5 ounces and is listed at $42.50. Home study courses ■ Introduction of home study course in radio, tv and electronics for Spanish-speaking students was announced last week by RCA Institutes Inc. The courses will be made available to students in Latin America. MitsubishL^Jriple Band System" # fj^&tter shortwave tuning. ? H Ill I refill The "three band system" makes it much easier to tune in adjacent shortwave stations on the Mitsubishi Electric 9X900 S. The "band spread" of the smartlooking 9X-900S is twice that of ordinary models since shortwave frequencies have been divided into upper and lower hands (Band 1 ; 4 MC 9 MC, Band 2 : 9MC-18.5MC) so that '-clustered" stations are much further apart on the dial. The fine-tuning adjustment, 9-transistor circuit and "three band system of the 9X-900S make its receptivity something spectacular. Ask your nearest dealer for a demonstration. ♦ MITSUBISHI ELECTRIC MANUFACTURING COMPANY Head Office: Tokyo Building, Marunourhi, Tokyo Cable Address: MELCO TOKYO BROADCASTING. April 8. 1983 9S