Broadcasting (Jan - June 1940)

STROMBERG CARLSON has announced a new high fidelity wide-range speaker designed for monitoring both A-M and F-M broadcasts. The useful response range is said to be extremely wide, with sound distribution essentially uniform over an angle of 100 degrees. The instrument incorporates three exclusive Stromberg-Carlson features— Labyrinth, Carpinchoe leather cone edge supports, and a nested, coaxial arrangement of the high frequency speaker within the hollow of the cone of the low frequency speaker. GATES AMERICAN Corp., Quincy, 111., has announced installations of Gates 250-A transmitters at WATW, Ashland. Wis.; WPAD, Paducah, Ky. ; KORN, Fremont, Neb. ; KBTM, Jonesboro, Ark.; WHBU, Anderson, Ind. and speech input systems at WOLS, Florence. S. C. ; KVNU, Logan. U. ; WGTM, Wilson, N. C. ; CHNS, Halifax, N. S., along with Dynamote pickup equipment In the radio room of the House of Representatives, Washington. RCA MFG. Co., has acquired building property at Bloomington, Ind., where it will establish another modern factory for producing "Nipper" table model radios. The new location was acquired as part of the company's expansion plans, and manufacturing facilities are to be installed immedi\ ately with the prospect of starting production by mid-year. Company of' ficials indicated that all employes, except a skeleton supervisory staff, will ; be recruited in the Bloomington area. RCA Mfg. Co. now has domestic man. ufacturing plants for its radio and , allied products in Camden ; Harrison, : N. J. ; Indianapolis, and Hollywood, : in which it employs more than 15,000 ' persons. ^WSAZ, Huntington, W. Va., has in, stalled an automatic tone beat for time signal broadcasts. Designed by Glenn E. Chase, chief engineer, the device couples an audio oscillator with an electric clock so that a musical note . is heard every hour. The note is A (above middle C and lasts one second. KRRV, Sherman, Tex., is erecting two 280-foot shunt-fed Lehigh towers and has let the contract for a fireproof transmitter building to be located be' tween Sherman and Denison, to house •a new 1,000-watt WE transmitter. The [Station recently was authorized to change frequency from 1310 to 880 kc. lunlimited. The directive antenna system was designed by A. Earl Cnllum 'Jr., Dallas consulting engineer. Phasing and monitoring for the new transfmitter also will be WE. HAMMOND INSTRUMENT Co.. ' Chicago, manufacturer of the Hammond electric organ, has introduced a new electrical "reverberation control" ' device on the tone cabinet which by producing echo characteristics is • claimed to give the instrument a tone [1 like a church organ. ij'A NEW MONITORING loudspeaker, |j employing a newly-designed permanent L magnet mechanism which requires no i' power supply and hou.sed in a cabinet ! permitting an unusually wide angle i of sound distribution, has been anj^ nounced by RCA. Unit (Model 64-B) combines the double voice coil speaker \ mechanism with a folded horn cabinet, ^ enabling faithful reproduction of all ■ frequencies between 60 and 10,000 cycles, RCA says, with cabinet reso. nance eliminated by the folded horn and closed back. Diffusing vanes in front of the cone spread the sound over a 100-degree arc at 10,000 cycles " and the speaker mechanism is equipped with a permanent magnet field requiring no power supply. Model is rated at 10 watts and has a 15 ohm input impedance. WMCA Starts Building Of Kearney Transmitter WMCA, New York, is starting work immediately on the construction of a 5,000-watt transmitter at Kearney, N. J., which will replace its present Flushing, L. I., site upon completion of the installation, expected sometime in May, according to WMCA engineers. Authority to increase its power from 1,000 watts full time to 5,000 watts daytime and 1,000 watts nighttime power and to construct a transmitter at the Kearney location was issued Feb. 7 to WMCA by the FCC. Three 325-foot towers built in parallel formation and spaced 385 feet apart, will concentrate the signal in the metropolitan area. Transmitter will be housed in a modernistic structure of white terra cotta, windowless but with partial glass brick walls. Building, completely air-conditioned and temperature-controlled, will house emergency equipment as well as the primary transmitter. Equipment was furnished by RCA to specifications drawn by Frank Marx, WMCA chief engineer, who will direct the transmitter installation. RCA engineers also cooperated in the design of the transmitter building. Work is being done by the Washington Construction Co. under the general supervision of Lockwood Green Co., engineering firm. Interviews Duff -Cooper JOHN NELSON, who conducts Candidly Speaking on KSFO, San Francisco, claims a scoop for his Feb. 14 interview of Alfred Duff-Cooper, Britain's former First Lord of the Admirality, in the Golden Gate city on a lecture tour. After the interview Duff-Cooper told Nelson that it was his first broadcast in America. YANKEE NETWORK'S frequency modulation station WIXOJ, Paxton, Mass., previously operating with a power output of 2,000 watts, is now completing 50 kw. installation. Radio Engineering Laboratories, New York, has been adjusting and testing the new F-M transmitter, which will be the most powerful transmtiter using the Armstrong system of wide-band F-M operation. Although the equipment was not scheduled for delivery until April, it was delivered and ready for testing prior to Feb. 15. NEW 1,000-watt high fidelity broadcasting transmitter has .iust been installed in the Municipal Bldg. of New York City and is now being tested under the direction of Isaac Brimberg, chief engineer of WNYC, New York's municipal station. Transmitter, W2RVP, which will operate on 26.1 mc. was built by Radio Receptor Co., New York, and is the first commercial broadcast job to be constructed by this concern, although it has been building transmitters for aviation, marine and Government contract work since 1922. WESTINGHOUSE E. & M. Co. has formed a special apparatus engineering section whose first assignment includes construction of a new transmitter for WBZ, Boston, at Hull, Mass., according to an announcement by Walter Evans, manager of the Westinghouse radio division. The WBZ transmitting plant will be similar to the 50 kw. equipment recently installed for KDKA, Pittsburgh. Ralph N. Harmon, since 1931 general engineer of the Westinghouse radio broadcast department, heads the new engineering force of 12 radio technicians specializing in general commercial design and production of radio apparatus of all types as well as handling all engineering activities of the Westinghouse broadcast department. Here is the other barrel 55 Since recent announcement of several new Gates speech units broadcasters asked for "the other barrel". Well here it is, in part at least, and you can obtain a swell 12 gauge load of infornnation on the complete new 1940 Gates speech equipments by writing for the Gates catalog, just off the press. An up to the minute control console that effects practically complete multi-rack control from the operator's desk. A mighty smart looking bit of merchandise also, that gives that added commercial touch to the studio group. A new high in uniform response and a new low In noise level marks this new Gates program amplifier for a long successful career. Inverse feed back and multiple input and output control salient features. Gates added two extra shields to the audio transformers in their new pre-amplifier series making them the answer for low background transmission. Small, high gain and universal !n-out impedances make it the complete pre-amplifier. The GATES Companies — — GATES AMERICAN CORPORATION — GATES RADIO & SUPPLY COMPANY QUINCY. ILLINOIS. U. S. A. cable address . gatesradio. j BROADCASTING • Broadcast Advertising March 1, 1940 • Page 63