Projection engineering (Sept 1929-Nov 1930)

Projection Engineering, September, 192!) Page 59 Specialists in SOUND PROJECTION Equipment and Installations Write Our Engineering Department SHURE RADIO COMPANY 335 West Madison St., Chicago, 111. flECHTHEim SUPERIOR CONDENSERS Widely Used For Reason of Their Neat and Efficient Construction, Dependability, Conservative Rating and Most Reasonable Price. Our new and remarkable types HV, rated at 550 rms EAC, 800 v DC, incorporate a high voltage filter of excellent electrical characteristics. Very small in size, exceedingly light in weight, unbelievably accurate in rated capacity, these noninductive units are solving the problems of space conservation and filter dependability. Unexcelled for Power Supply and Power Amplifier uses. Not merely keeping pace with the times, but actually setting the precedent time and again, Flechtheim is proud to be able to offer a new compact condenser unit of noteworthy achievement. Type HV is finding increased use by radio men everywhere. Made in block form, tapped 0-2-4-4 mfd with a rating of 750 rms RAC. A Universal Filter block that will serve for any amplifier tubes, from the 171 to the 250s. For stationary rack amplifiers and for portable work, they can be relied upon to filter out the last vestiges of a ripple and to stand up for long periods of continuous operation. Its unlimited uses warrant your interest, for it will improve any power pack or amplifier. Also, another new High Tension Filter block, type TC244, tapped 0-2-4-4 mfd rated at 1000 v DC, 750 rms RAC Made up of our regular 1000 volt filter condensers. Send For Our New Fall Catalog A. M. FLECHTHEIM & CO., Inc. 136 Liberty St., New York City, N. Y. Immediate Delivery — guaranteed f With our greatly increased manufacturing facilities at Maiden, Mass., and at Cranford, N. J., we absolutely guarantee prompt delivery of Resistors for EVERY Resistance Need for at least the next eight months, no matter how large or how small the order. Our factory facilities and our complete line of quality resistances will enable us to satisfactorily take care of your requirements. We can give you WHAT you want, WHEN you want it. LYNCH Veritas Resistors are supplied in either cartridge or pigtail type, and are made in four sizes with 2 watt, 5 watt and 1 0 watt ratings. Capacities range from 500 ohms to 10 megohms. The Lynch Veritas Resistors have the metallic resistive coating fused to the inside of the glass, and can run a great heat without change in value. Not affected by humidity non-absorbent. It is as perfect a resistance as can be made. LYNCH Dynohmic Resistors Furnished in cartridge or pigtail type, capacities ranging from 250 ohms to 10 megohms, '/2, 1 and 2 watt types. The resistance element is based on the famous metallized principle which has proved its superiority where accuracy and uniformity are of paramount importance. Special sizes of ALL Lynch Resistors can be made to order on very short notice. Lynch Resistors are specially suited to the exacting needs of manufacturers of sound and light projection equipment — theatrical and home talking movies — home entertainment equipment — cameras, recording and amplifying devices — television, etc. Approved by leading engineers. Endorsed by test and experimental laboratories. Employed by scientific apparatus and precision instrument makers. Selected by discriminating radio receiver manufacturers. Send us your specifications. Get our prices. Let us send you samples. Be prepared for any emergency that may confront you. Descriptive folder upon request. Lynch Manufacturing Company, Inc. 1775 Broadway (at 57th St.,) New York, N. Y. (Manufacturers oj Quality Radio Products