Radio Broadcast (May 1928-Apr 1929)

RADIO BROADCAST ADVERTISER 153 This Is tke Type of Kit that GRAYMORE Heartily Recommends and Can. Ship from Stock 710 Sar gent-Ray ment Seven Designed by two famous engineers to give the very extreme of results now possible in broadcast reception, irrespective of cost, the S-M 710 Sargent-Rayment Seven sets an entirely new standard. Exhausting the tremendous distance possibilities of 4-screen-grid R.F. stages — bringing in a station on every 10-kilocycle channel right around its single-control dial (with five auxiliary vernier knobs) — equipped with the unequalled S-M Clough system audio amplifier — yet the 710 is only $175 custom-built complete, or $130 for kit including aluminum cabinet. 720 Screen Grid Six The new S-M 720 embodies in the most perfect form the revolution that screengrid tubes have brought about in longdistance reception. Three of these tubes in the R.F. stages, with shielded S-M coils, bring in distant stations on the next 10 kc. channel to powerful locals! The new S-M 255 and 256 transformers set a far higher standard of tone quality than ever known before. Custom-built complete in 700 cabinet, $102.00; complete kit, with pierced metal chassis and antique brass escutcheon but without cabinet, $72.50. 700 Shielding Cabinet Beautiful two-tone brown moire finish, with walnut finish wood base, $9.25. 740 Coast-to-Coast Four A time-tested and famous circuit — one R.F. stage, regenerative detector (nonradiating) and two A.F. stages — combined with immeasurably finer coils, the high efficiency of the screen-grid tube, all the gain of smooth-working regeneration, and new S-M Clough-system audios, make the 740 the greatest value in the fifty-dollar class. WIRED in 700 cabinet: 740 (for D.C. tubes) $75; 740AC (A.C. tubes) $78. Kit less cabinets 740, $51; 740 AC, $53. 680 Series Unipacs Perfect reproduction and hum-free light-socket operation have made S-M Unipacs famous. There are four types: two single-stage, and two two-stage models, using 210 or 250 tubes singly and in push-pull. Unipacs are available in kit or wired form — some supplying ABC power to receiver — at $81.50 to $117. Also 685 PublicAddress — WIRED, $160; KIT, $125. Round -tKeWorld Short Wave Sets --and that means exactly what it says. As for instance: RADIO STATION CFBO SAINT JOHN, N.B. CANADA Silver-Marshall Inc., Chicago, III. Dear Sirs: — About two months ago I purchased one of your Round the World Four Short Wave Kits ... The first day I had it was on a Sunday and from 12 Noon our time until 12 Midnight I never was without music. This set brought in KDKA, WGY, 5SW Chelmsford England and PCCJ Holland all with Loud Speaker Volume and good modulation. Since then I have used same in St. John here for rebroadcasting thru our station CFBO. As I am writing this only to-day I have been able to bring the first two Worlds Series Baseball games and rebroadcast them complete from start to finish. Please remember that we do not get any daylight reception here at all from either U.S. or Canadian Stations on the B.C.L. band, 200 to 600 Meters. In closing I can only say that I built over twelve different short wave sets and yet to find the equal of the Round the World Four. 5SW comes in every evening and 50% of the time with loud speaker volume. Yours very truly F. D. Thorne Supt. CFBO S-M "Round-the-World" Sets Are Available as Follows COMPLETE KIT Everything necessary to build the complete four tube r.f. regenerative (non-radiating) short-wave set, including aluminum cabinet and two S-M Clough audio transformers. 730 Complete Kit .$51.00 730 Set, Wired $66.00 ADAPTER KIT Complete with aluminum cabinet, less the two audio stages. Used with an adapter plug, it converts any broadcast receiver for shortwave use. Ideal for Television. 731 Adapter Kit $36.00 731 Adapter, Wired $46.00 ESSENTIAL KIT Contains the two tuning and tickler condensers, four wound plug-in coils, coil socket, and three r.f. chokes, with full instructions for building a 1, 2, 3, or 4 tube set. 732 Essential Kit $16.50 Headquarters for S-M Parts and Kits WE are one of Silver-Marshall's largest jobbers, and can fill promptly your mail orders for S-M, as well as for other high quality merchandise. Send coupon for our new catalog. Best discounts r to dealers. Graymore Radio Corporation I Prompt shipments on all items of the S-M. line, including the neiv 678PD Phonograph Amplifier and power supplies and transformers of all types. GRAYMORE RADIO CORP. 142 Liberty St., New York, N. Y. Please send your big new catalog of highest quality radio parts and kits. n 142 Liberty St. New York, N. Y. Name. Address. Town State.