Radio Broadcast (May 1929-Apr 1930)

Record Details:

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RADIO BROADCAST ADVERTISER X SPECIAL TEST EQUIPMENT for use in the service laboratory is soon to be announced. This will include an oscillator for measuring the overall response characteristics of a receiver for the entire broadcast band. It will be inexpensive, compact, and of General Radio quality. Write for Bulletin G-l GENERAL RADIO COMPANY 30 State Street Cambridge, Massachusetts 274 Brannan Street San Francisco, California MODEL 489 D. C. PORTABLE THREE-RANGE VOLTMETER 750 250 10 Volts 1000 Ohms per Volt Resistance A STURDY, miniature instrument, suitable for home or laboratory use — popular because of its small size and unusual electrical characteristics. A truly professional instrument, with all the niceties of design and construction which make a "Weston" so desirable. Solid black bakelite case, convenient pin jacks, and test cables equipped with pin terminals for insertion in the jacks. Reasonably priced. Weston Electrical Instrument Corp. 604 Frelinghuysen Ave., Newark, N. J. WESTON RADIO INSTRUMENTS 1 24 • WHY POL YMETEQUIPPED RADIOS ARE WORTH MORE G0& °^ Hen ; are some of the merits we have been running in the Saturday Evening Post — interesting, instructive messages, that acquaint the non-technical public with the functions of the condensers and resistances we manufacture, and, at the same time, awaken a nation-wide consumer acceptance of, and preference for, sets equipped with well-known Polymet Products. That's why these sets are worth more to radio manufacturer, jobher and dealer. POLYMET MFG. CORPORATION 837 East 134 th St. New York City POLYMET PRODUCTS Jensen Patents allowed and pending. Licensed under Lektophone Patents ■An* / the demand of an INDUSTRY ■ the new r enaen W CONCERT DYNAMIC Peter L. Jensen has applied entirely new and original principles in the design of this new dynamic. The cone is 10 inches in diameter. The moving coil represents an innovation in design. The sensitivity is greater than that ever attained in any previous dynamic speaker, and the ability to reproduce enormous volume is exceeded only by the Jensen Auditorium Dynamic. The Concert Dynamic definitely sets a new standard of excellence. For along with the musical reproduction of bass notes as low as 30 cycles, the higher frequencies are reproduced with extraordinary brilliance. In fact the entire musical scale is reproduced with a brilliance and firmness of quality never acquired before. There is no need of a "side by side" comparison to appreciate the superiority of this new speaker. Wherever it is heard its performance is both startling and impressive. Write for complete information and ask for a frequency response curve of this new speaker if you are interested. Ask also about the new Jensen Imperial, a beautiful cabinet equipped with either the Concert or Auditorium Unit. WEW LOW PRICES JENSEN CONCERT DYNAMIC with 10 inch cone D7AC, $35.00 D7DC, $27.50 JENSEN AUDITORIUM DYNAMIC tvith 12 inch cone DA5AC, $70.00 DA5, $55.00 DA4, $55.00 JENSEN PATENTS ALLOTTED AND PENDING LICENSED UNDER LEKTOPHONE PATENTS Jensen Radio Mfg. Co. 6601 S. Laramie Ave., Chicago, 111. 212 Ninth St., Oakland, Calif. • .1 U I. Y 1 <) 2 9 •