Radio today (Jan-Mar 1939)

LINE FILTERS Power filters P Radio set S AEROVOX CORP., 70 Washington St., Brooklyn. N. Y., "Aerovox"— P, S AMERICAN COMMUNICATIONS CORP., 1650 Broadway, New York, N. Y., "American" — P AUTOMATIC ELECTRICAL DEVICES CO., 324 E. 3rd St., Cincinnati, Ohio, "Filterad" — P AUTOMATIC ELEC. MFG. CO., 729 S. Front St., Mankato, Minn. — P L. S. BRACH MFG. CORP., 55 Dickerson St.. Newark, N. J.—f CAVALCADE RADIO MFG. CO., 271 7th St., San Francisco, Calif., "Cavalcade"— 8 COLE RADIO WORKS, 86 Westrille Ave., Caldwell. N. J., "Cole"— P CONSOLIDATED WIRE & ASSOC. CORP., Peoria fc Harrison Sts., Chicago, 111. CONTINENTAL CARBON, INC., 13900 Lorain Ave., Cleveland, Ohio, "Continental," "Filternoys" — P, S TOBE DEUTSCHMANN CORP., Canton, Mass., "Tobe Filterette"— P, S DUMONT ELECTRIC CO., INC.. 514 Broadway. New York, N. Y.— P, S ELI M-O-STAT— Solar Mfg. Corp. ESPEY MFG. CO., INC., 67 Irving PL, New York, N. Y., "Si-len-ser" FERRANTI ELECTRIC, INC., 30 Rockefeller Plaza, New York, N. Y., "Ferranti" FILTERAD — Automatic Electrical Devices Co FILTERETTE— Tobe Deutschmann Corp FILTERNOYS— Continental Carbon, Inc. FILTERVOLDS — Insuline Corp. of America GENERAL WINDING CO., 254 W. 31st St.. New York, N. Y., "Gen-Win"— P. S GEN-WIN— General Winding Co. GIRARD-HOPKINS, 1437 23rd Ave., Oakland, Calif. — S INSULINE CORP. OF AMERICA, 25 Park Place, New York, N. Y., "ICA Filtervolds"— P, S INTERNATIONAL TRANSFORMER CO., 39 W 20th St., New York. N. Y.— P MEISSNER MFG. CO., 7th & Belmont. Mt. Carmel, 111.— S J W. MILLER CO., 5917 S. Main St.. l,ns Angeles. Calif., "Miller"— P, S MONARCH MFG. CO., 3341 Belmont Ave.. Chicago, 111., "Monarch" — S PHILCO RADIO & TELEVISION CORP.. Tioga & C Sts., Philadelphia, Pa. — P, S PHILMOBE MFG. CO., 133 University Place, New York, N. Y., "Philmore"— P. S POTTER CONDENSER CO., 1950 Sheridan Rd., North Chicago, 111.— P, S RACON ELECTRIC CO., INC., 52 E. 19th St.. New York, N. Y., "Racon" — P RCA MFG. CO., Front & Cooper Sts . ramrten. N. J., "RCA" SI-LEN-SER— Espey Mfg. Co.. Inc. SNYDER, INC., Noble & Darien Sts. Philadelphia. Pa.— P SOLAR MFG. CORP., 599 Broadway, New Ynrk. N. Y., "Elim-O-Stat"— P, S TACO — Technical Appliance Corp TECHNICAL APPLIANCE CORP.. 17 E: Ifith St.. New York, N. Y., "Taco"— S TOBE FILTERETTE — Tobe Deutschmann Corp. UNITED TRANSFORMER CORP., 150 Varick St., New York, N. Y., "UTC"— P UTC — United Transformer Corp. PLASTIC MOLDERS Cabinet molders C Small parts molders . . . . P A I REX — Electronic Products Co. ALDEN PRODUCTS CO., 715 Center St.. Brockton. Mass.— P AMERICAN PHENOLIC CORP., 1250 W Van Buren St., Chieago, 111., "Amphenol" — P AM PHENOL— American Phenolic Corp. ASSOCIATED ATTLEBORO MFRS., INC., Attleboro. Mass. AUBURN BUTTON WORKS, Auburn, N. ¥.— C BARBER-COLMAN CO., Rockford, 111.— P B00NT0N MOLDING CO., Boonton, N. J. CHICAGO MOLDED PRODUCTS CO., 2140 Walnui St., Chicago, 111.— C, P COLT'S PATENT FIRE ARMS MFG. CO., Hartford Conn. HARRY DAVIES CO., 1428 N. Wells St.. Chicago. HI.— C, P DIEMOLDING CORP., Canastota, N. Y— P DUREZ — General Plastics, Inc. ELECTRONIC PRODUCTS CO., 5356 E. 9th St.. Los Angeles, Calif., "Airex" — P ERIE RESISTOR CORP., 644 W. 12th St.. Erie. Pa., "Erie"— P ERIE — Erie Resistor Corp. GENERAL PLASTICS, INC., North Tonawanda, N. Y., "Durez" — C, P INSULATION PRODUCTS CO., Richland St. & Annon Way, Homewood Station, Pittsburgh, Pa. — P INSUROK— The Richardson Co. KELLOGG SWITCHBOARD & SUPPLY CO., 6650 So. Cieero Ave., Chicago, 111., "Kellogg" — P KEYSTONE SPECIALTY CO., 1373% Cove Ave., Lakeland, Cleveland, Ohio — P KURZ-KASCH CO., Dayton, Ohio— C, P MEISSNER MFG. CO., 7th & Belmont. Mt. Carmel. 111.— P ELMER E. MILLS CORP., 812 W. Van Buren St.. Chicago. 111.— P RECTO MOLDED PRODUCTS, INC., Brewnway & B & 0 RR, Oakley, Cincinnati, Ohio REMLER CO., LTD., 2101 Bryant St., San Francisco, Calif., "Remler" — C, P REMLER— Remler Co., Ltd. RESINOX CORP., 230 Park Ave., New York. N. Y — Plastic molder RICHARDSON CO., 2738 Lake St., Melrose Part. Chicago, I1L, "Insurok" — C, P SYRACUSE ORNAMENTAL CO., Syracuse, N. Y.— C, P UNIVERSAL MOLDING CO., 16th & Vermont Sts., San Francisco, Calif. — C, P WARSAW BUTTON CO., 325 W. Huron St., Chicago 111. WATERTOWN MFG. CO., 127 Echo Lake Rd., Watertown, Conn. — C, P CAN WU TEST THETUBES NEXT MONTH ? New filament arrangements just announced and to be announced are obsoleting thousands oi tube testers. The demand ior a better tube, one which would perform at higher frequencies, necessitated a mechanical change in tube design which resulted in the single-ended tube. This same mechanical change, primarily developed lor television, has been incorporated in radio receiving tubes because of its many advantages. In changing the ordinary tube to a single-ended tube, filament termination can not be held constant; the grid gets the most consideration and the filaments have to look out for themselves. At left are shown a few tube bases with different filament terminations. There are at present fifteen filament arrangements. But remember, there are 143 different filament terminations possible without considering centertapped type filaments. Center tapped filament combination possibilities would raise this figure to several hundred. Most tube testers in use today are already obsolete — the oft-bragged about spare socket is oi little or no help, and the constant purchase of adapters will soon equal the original cost of the tester. So the average service-man must buy a new tube tester — not just for TODAY'S tubes but for the tubes which will be announced next month or next year. "OTJLY SUPREME HAS THE PATENTED "DOUBLE FLOATING" FILAMENT RETURN SELECTOR PUSH BUTTON SYSTEM! No matter how filament terminations roam — no matter if they are center tapped or not— the SUPREME MODEL 504 "TOMORROWS TUBE AND SET TESTER" will check them. With SUPREME'S unique and exclusive "Double Floating" Filament Return Circuit, you just press a button and the tube's filament is automatically connected across the filament potential supply, regardless of the tube's base terminations. The Model 504 is not only the world's most complete tube tester but it is also a complete set tester and a complete condenser analyzer. You need full information on the Model 504 so we urge you to see this remarkable value in tube and set testing equipment at your jobber's TODAY, or, write for full literature on this and many other completely new 1939 models of SUPREME test equipment. Brand new literature just off the press! Model 504 cash price, $55.50; or $5.09 cash and 11 monthly payments of $5.09. MARCH. 1939 When writing advertisers, please say you saw it in the 1939-40 RADIO YEAR BOOK 69