Radio today (Apr-Dec 1939)

Itou Hew JMikfs Hickok Voltmeter-Oscillator > * Crystal controlled oscillator with dual 100-1,000 kc. crystal has harmonic outputs to 100 mc. with error of less than 0.01 per cent. Self-contained power level meter has three db ranges from — 10 to -f38. VTM checks gain per stage. Hickok Electric Instrument Go., 10514 Dupont Ave., Cleveland, Ohio. — Radio Today. ps* Atlas Mike Cable Hanger ■k Cast aluminum clamp holds cable hanger firmly without altering mike stand in any manner. Atlas Sound Corp., 1447 39th St., Brooklyn, N. Y. — Radio Today. Regal Tokfone •k Selective or group paging and inter-communication may be had between any or all of 10 stations simultaneously. 7-10 watt amplifier. Calls may come from remote stations if three conductor wiring is installed. Regal Amplifier Mfg. Corp., 14 W. 17th St., New York, N. Y — Radio Today. %H§ Hallicrafters Crystal Oscillator •k Crystal oscillator with fundamental outputs of 10, 100, and 100 kc. uses a harmonic amplifier and multivibrator. 10 kc. barmonics are strong enough for check points to 15 mc. while the 100 and 1,000 kc. harmonics extend beyond 30 mc. Hallicrafters, Inc., 2611 S. Indiana St., Chicago. — Radio Today. IRC Plug-in Shafts -k Line of special standard type CS metallized controls have plug-in shafts to facilitate replacement in tight places. Shafts are pressed in with the flat at any angle of rotation. International Resistance Corp., 401 N. Broad St., Philadelphia, Pa. —Radio Today. RCA Tube Tester k Tube tester available in counter or portable models, tests all present tubes, also pilot bulbs and Christmas tree lamps. Each model has two spare sockets and space on roll chart for data on future tubes. Filament voltages up to 120 are obtainable. Models 156-C and 156-B. List prices, $37.95 and $39.95 for counter and portable models respectively. RCA Mfg. Co., Camden, N. J. — Radio Today. Kodacap Tubular Condenser k A special process cellulose derivative is the dielectric for a new 1,000-volt tubular capacitor which is slightly smaller than the ordinary 600-volt units of same capacity rating. The new condenser is not only superior in its ability to stand higher than rated voltages under ordinary conditions but also shows marked improvement under high humidity conditions. Tests show life of three times the ordinary paper-insulated condensers. Especially adapted for use in public-address equipment, television receivers, and other devices requiring a high-voltage capacitor with margin of safety. Micamold Radio Corp., 1087 Flushing Ave., Brooklyn, N. Y. — Radio Today. Kenyan Transformers •k Two new products, a modulation transformer T-489 with tapped primary and secondary for match ing impedances from 2,000 to 20,000 ohms has audio power rating of 15 watts. Filament transformer T-386, has 6.3 v. 3 amp. CT, and 5 v. 4 amp. CT windings. Catalog on request. Kenyon Transformer Co., 840 Barry St., New York, N. Y.— Radio Today. Port-O-matic Portable •k Superhet operates on batteriesAC-DC. Tunes standard broadcast and 16 to 49 meters. Four tubes used in battery position while six and ballast are used in electrical operation. Has on-off indicator and pilot light. Model USW-17-C, cowhide cover, list $54. Also Model USW-17-C, aero-tweed, $45.50. Batteries extra at $3.50 for A and B kit. Port-O-matic Corp., 1013 Madison Ave., New York, N. Y. — Radio Today. Stancor Hi-Fi Transformers •k Line of high fidelity audio transformers featuring reversible mounting, and electrostatic shield terminal has uniform frequency response from 30 to 15,000 cps. Standard Transformer Corp., 1500 N. Halsted St., Chicago. — Radio Today. 26 RADIO TODAY