Radio Broadcast (May 1928-Apr 1929)

320 RADIO BROADCAST ADVERTISER RADIO'S FINEST PRECISION RECEIVER "The Sargent-Rayment Seven" A STATION tuned in for every ten kilocycles — a hundred stations heard in one summer evening, in the heart of Chicago interference — that is the performance record of the 710 Sargent-Rayment Seven — latest masterpiece of these inventors of a unique receiver system of past popularity. The 710 Sargent-Rayment Seven is a precision laboratory radio receiver for the veteran fan. It has been designed throughout as such. It is like a battleship stripped for action, shorn of every piece of surplus gear. The thick aluminum shielding and chassis, finished in satin silver and trimmed by black instrument name plates with white engraving gives to the appearance a beauty and dignity in keeping with the set's fine performance. Electrically, the receiver consists of five sharply tuned circuits in a four-stage screen grid R.F. amplifier, all tuned by a single illuminated drum, and provided with individual verniers. One knob turns the set on and off — another controls volume from zero to maximum. There are no other controls. Following the R.F. amplifier are the detector and the A.F. amplifiers, using the new S-M 255 and 256 audio transformers which provide unequalled tone quality and high volume in a perfect circuit balance with the 251 tone filter which is included. Each circuit is individually shielded, bypassed, and isolated from all others. The set goes together simply and positively, with clear direct wiring. It is a joy to build, so workmanlike is its design and layout. To the fan who appreciates and values really fine performance, in a truly precision receiver of great individuality and distinction, we unhesitatingly recommend the 710 Sargent-Rayment Seven. The kit for this receiver, appoved by the designers and exclusively manufactured by Silver-Marshall, Inc., is priced at $130.00 complete with cabinet and walnut finish moulding. Note: All our customers will be supplied as rapidly as possible with the Approved Sargent-Rayment kit, but since speed of production is necessarily limited by the extreme precision required in every part of this unique receiver, orders should be placed at once by those desiring to be early on the ground with the Sargeant-Rayment Seven. 740 COAST-TO-COAST FOUR *TPO the thousands of fans for whom the four-tube, R.F. amplifier, regenerative detector and two-stage audio amplifier is the time-tested standard of receiver comparison, the new Coa9t-to-Coast Four offers the finest performance yet attained with this remarkable circuit. A screen grid R.F. amplifier stage, immeasurably finer coils than ever before, the new Glough high-gain audio system, and an all-metal assembly, make the "740" the biggest $51.00 worth of radio set you've ever listened to. Through summer static, the Goast-to Coast Four plays on the speaker New York, Florida, Texas, and California stations, cutting through local Chicago interference only 10 or 20 K..C. away. Its tone quality is such as only S-M transformers can provide. Housed, like the 720 Six, in the new S-M 700 tablemodel metal shielding cabinet, it harmonizes beautifully with any home furnishings. Despite this demonstrated superiority, in every respect, over all other sets in its price class, the 740 complete kit costs but $51.00; or the 740AC kit, $53.00 complete. The 700 cabinet is $9.25 additional. We go emphatically on record that no matter what set you build or buy, the 740 Coast-to-Coast Four is the best dollar for dollar value you can find around fifty dollars. It goes together easily and simply, performs with a vengeance, and for the professional setbuilder provides a low-priced set that will outdemonstrate ready-made sets at twice its price. S-M 676 Dynamic Speaker Amplifier This is a single stage power amplifier especially for use as a third stage, after any radio set, to boost volume and tone to give extra fine results with standard dynamic loud speakers. It uses one UX281 rectifier and one UX250 super-power amplifier, and has binding posts for receiver output connections, loud-speaker cord tips, and also for the dynamic speaker field. The 675 Amplifier operates any dynamic speakers having a 90 to 120 volt DC field, to which it supplies necessary power. Added to any set equipped with a dynamic speaker, it will provide a marvelous improvement in tone and volume. Price, 676 "WIRED, $55.00; or 676 in KIT form, $49.00. Western Radio Mfg. Co. "The Big Friendly Radio House" 128 West Lake Street Chicago, Illinois MEDIUM AND HIGH VOLTAGE POWER SUPPLIES B and ABC Power Units for Radio Sets S-M 670B Reservoir Power Unit has 6ve different B voltages, of 22, 90, 135, and 180 volts fixed, and one variable voltage ranging from 22 to 90 volts. It will deliver up to 60 M.A. to operate any standard receiver, and is specifically recommended for S-M receivers. Type 670ABC is the same unit with li, 2J. and 5 volt A.C. filament supply added, and is a complete ABC power plant for an A.C. tube equipped receiver. Both use one UX280 rectifier. Price. 670B, WIRED, $43.50, or in kit Jorm $40.50. Price 670ABC power supply WIRED, $46.00, or, in kit form, $43.00. C— 1 7 — f w ower Unit 675ABC High Volta_ S-M 675 power unit is a high voltage power supply delivering 450 volts maximum. It is provided with an adapter which allows a UX210 or UX250 super-power tube to be used in the last stage of any receiver at all, to which the 675ABC supplies 22 fixed, 22 to 90 variable, and 90, 135, and 450 volts B power, as well as A and C power for the power tube, and lj and 2j volts A.C. for A.C. tube filaments if used. It is the. biggest power unit value ever offered, and costs but $58.00 WIRED, or $54,00 in kit form, less one UX281 rectifier tube. Full Line of S-M Products We carry every kit or part mentioned in this section. Prompt service is assured. Maximun discounts to dealers. Send the coupon now. ■ WESTERN RADIO MFG. CO. I 128 W. Lake St.. Dept. SB-10 | Chicago, 111. I Please send at once your new FREE catalogue listing S-M parts and kits as well | as many other highest-quality radio products. I Name Address