Radio Broadcast (May 1929-Apr 1930)

-RADIO BROADCAST ADVERTISER. Is There No Limit To Wkat an S-M Receiver Will Do$ Australia to New York On Six Tubes MORE and more astounding are the records of long-distance reception with Silver-Marshall screen-grid receivers. First the S-M 710 (SargentRayment Seven) made itself famous as the one set which, in California, could be relied on to bring in Japanese broadcasting stations in any kind of favorable conditions — and often when conditions were otherwise. Later, reports began to be published of reception across the Pacific with the S-M 720 Screen-Grid Six — using only three screen-grid r.f. stages instead of four. Then, in March, came the publication of verified reception in New York City, from 2BL at Sydney, with the 710. And now the Australia-to-New York record has been duplicated with the 720 Screen-Grid Six. Not every one, perhaps, has the necessary skill to bring in stations from half way around the globe — but the hard-toplease listener, wherever he may be, soon finds that screen-grid tubes, combined with Silver-Marshall engineering, are the ultimate answer to every demand for superlative radio reception. 5* -fit0 qJS> 0JJ» .to9-" (Mr. White states this is his fourth reception from 4QG. Any one wishing to write him is requested to enclose a self-addressed envelope.) Never-Equalled Tone Fidelity With S-M Audio Transformers Equally startling records for faithful musical reproduction have been made this season by S-M Clough System audio transformers. These remarkable instruments, practically eliminating hysteretic distortion in all types of radio receivers, are now available in a full line of models. The tremendously popular 255 and 256 straight audio types cost only $3.60 NET, and correspondingly low net prices have been set on all other types, including push-pull and output transformers and chokes. New List Prices (NET) on S-M Sets S-M No. Name Scr.-Gr. Tubes Wired Receiver Component Parts Total 710 720 720AC 730 731 740 740AC Sargent-Rayment Seven . . 4 3 3 1 1 1 1 $113.40* 66.30* 70.20* 42.90* 30.00* 48.60* 50.70* $78.84* 44.79 47.07 31.71* 22.86* 30.96 32.97 Screen-Grid Six (A. C ). . "Round-the-World" Four. "Round-theWorld" "Coast-to-Coast" Four. . . . "Coast-to-Coast" 4 (A.C.) Setbuilders who have taken advantage of the unique franchises granted by Silver-Marshall, Inc., to Authorized S-M Service Stations have found that the building of radio sets and amplifiers from S-M standard parts is a highly profitable as well as an interesting business. If you build professionally, and have not investigated the Service Station proposition, ask about it now. And in any case, do not miss the monthly S-M "RADIOBUILDER"; every issue contains big news for setbuilders. Use the coupon. SILVER-MARSHALL, Inc. 6403 West 65th St., Chicago, U. S. A. I Silv I 640 ilver-Marshall, Inc. 6403 W.65th St., Chicago, U. S. A. .... Please send me, free, the new "NET-PRICE' S-M Catalog; also copy of the RADIOBUILDER. For enclosed in stamps, send me the followi ng : . SOc Next 12 issues of The Radiobuilder . $1.00 Next 25 issues of The Radiobuilder S-M DATA SHEETS asfollows, at2c each; .No. 1 .670B. 670ABC Reservoir Power Units .No. 2. 685 Public Address Unipac .No. 3. 730. 731. 732 "Round-the-World" Short Wav e Sets No. 4. 223. 225, 226. 256, 251 Audio Transformers .No 5 .720 Screen Grid Six Receiver .No .6. 7 40" Coast-to-Coast" Screen Grid Four .No. 7 . 6 75ABC HighVoltage Power Supply and 676 Dynamic Speaker Amplifier ■ No. S. Sargent-Rayment Seven • No. 9. 678PD Phonograph Amplifier .No. 10. 720AC All-Electric Screen-Grid Six. . No. 12. 669 Power Unit (for 720AC) "I E" I Name. . . Address . • JULY • 1 929 • • 127