Radio today (Jan-Dec 1938)

Record Details:

Title:
Radio today
Date:
Jan-Dec 1938
Publisher:
New York : Caldwell-Clements, Inc.
Volume:
Radio today (Jan-Dec 1938)
Leaf #:
000254
Language:
English
Collection:
Broadcasting & Recorded Sound
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Recorded Sound Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Date Added:
September 28, 2023
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NEW SOUND ITEMS 25-watt amplifier •k Amplifier with multi-stage inverse feedback. Power output of 25 watts with 2i^ per cent distortion. Frequency flat within 1% DB from 50 to 10,000 cycles. Webster-Chicago Model 2L-25. Webster Co., 5622 Bloomingdale Ave., Chicago, 111. — Radio Today — see also advt. p. 27. Clarion 30-watt sound system ■* Fixed type sound system having 30-watt output with 7 per cent distortion. Uses two 12-inch speakers with flare baffles. Gain of 131 DB with 1 meg input resistance. Uses 6L6 tubes. Inverse feedback, luminous glo dials. Multi-impedance output transformers. Transformer Corp. of America, 69 Wooster St., New York, N. Y. — Radio Today— see also advt. p. 43. Talking door interphone •k Wired type interphone for use in providing communication with visitor at the door. Eliminates need of going to door for peddlers and salesmen. Housewife can find out who is there without opening door. Uses 3-tube amplifier and PM speakers. Consumes no current when not in use. Requires no drilling in door, just fastens to inside of door. List $29.95. Regal Amplifier Co., 16 W. 17th St., New York., N. Y. — Radio Today — see also advt. p. 47. Lafayette sound system ■*• 70-watt sound system with 100-watt peak output. Push-pull parallel beam power tubes. Automatic volume control or volume expansion. Mixing and fading facilities for 4 input channels. Four heavy-duty PM speakers, two mikes supplied. Housed in 3 carrying cases. Wholesale Radio Service Co., 100 Sixth Ave., New York, N. Y.— Radio Today — see also advt. p. 49. Operadio amplifier + 35-watt sound amplifier. Three input channels — electronic mixer. Distortion of only 5 per cent. Can be used with all types of mikes. Gain of 134 DB. Non-resonant equalizer used as tone balancer for high and low frequencies. Base type mounting — can be bolted to standard 19-inch rack. Supplies field to 2 speakers. Operadio Mfg. Co., 13th St., St. Charles, 111.— Radio Today — see also advt. p. 41. Vocagraph mobile amplifier * 30-watt sound system for use on AC or 6-volts DC. Beam power output tubes. Built-in AC power pack. Changeover accomplished by flip of a switch. Complete accessories available. Model 30-M30 amplifier— list $109. Vocagraph Sound System, 164 N. May St., Chicago, 111. — Radio Today— see also advt. p. 48. Power amplifiers * Booster type amplifiers for use with any sound system. Beam power output stages with inverse feedback. Built-in driver stage. Facilities for electrically excited speakers. Available in 25-watt and 60-watt outputs. Modern styled cases. Allied Radio Corp., 833 W. Jackson Blvd., Chicago, 111. — Radio Today. Velotron microphone + No voltage velotron microphone. Output level of —50 DB. Bidirectional characteristic. Substantially free from peaks. Can be used with runs up to 1,000 feet. Requires no matching transformer — works into grid of tube. Units may be used in parallel. Available in high, medium and low-pitch types. List $22.50 less cable. Bruno Labs., 30 W. 15th St., New York, N. Y — Radio Today. Bogen mobile amplifier •At Universal type mobile amplifier for 6-volts DC or 110 AC. Conversion accomplished by changeover switch. 28-watts undistorted output. Universal mike input. Tapped output impedances. Electronic mixing. Stand-by switch for saving battery consumption. Crystal type pick-up. Model C28— list $132.50. Phono assembly — $49.50. David Bogen Co., 663 Broadway, New York, N. Y. — Radio Today — see also advt. p. 47. (Continued on page 43) 40 Radio Today