Radio Broadcast (May 1927-Apr 1928)

246 RADIO BROADCAST ADVERTISER "RADIO BROADCASTS" DIRECTORY OF MANUFACTURED RECEIVERS <I Acoupon will be found on page 258. All readers who desire additional bers in the coupon, mail it to the Service Department of Radio Broadcast, information on the receivers listed below need only insert the proper num and full details will be sent. New sets are listed in this space each month. KEY TO TUBE ABBREVIATIONS 99— 60-mA. filament (dry cell) 01-A — Storage battery 0.25 amps, filament 12 — Power tube (Storage battery) 71 — Power tube (Storage battery) 16-B — Half-wave rectifier tube 80 — Full-wave, high current rectifier 81 — Half-wave, high current rectifier Hmu — High-Mu tube for resistance-coupled audio 20 — Power tube (dry cell) 10 — Power Tube (Storage battery) 00-A — Special detector 13 — Full-wave rectifier tube 26 — Low-voltage high-current a. c. tube 27 — Heater type a. c. tube Direct Current Receivers no. 424. colonial 26 Six tubes; 2 t. r. f. (01-A), detector (12), 2 transformer audio (01-A and 71). Balanced t. r. f. One to three dials. Volume control: antenna switch and potentiometer across first audio. Watts required: 120. Console size: 34 x 38 inches. Headphone connections. The filaments are connected in a series parallel arrangement. Price $250 including power unit. NO. 425. SUPERPOWER Five tubes: All 01-A tubes. Multiplex circuit. Two dials. Volume control: resistance in r. f. plate. Watts required: 30. Antenna: loop or outside. Cabinet sizes: table, 27 x 10 x 9 inches; console, 28 x 50 x 21. Prices: table, $135 including power unit; console, $390 including power unit and loud speaker. A. C. Operated Receivers' NO. 508. ALL-AMERICAN 77, 88, AND 99 Six tubes; 3 t. r. f. (26), detector (27), 2 transformer audio (26 and 71). Rice neutralized t. r. f. Single drum tuning. Volume control: potentiometer in r. f. plate. Cabinet sizes: No. 77, 21 x 10 x 8 inches; No. 88 Hiboy, 25 x 38 x 18 inches; No. 99 console, 27} x 43 x 20 inches. Shielded. Output device. The filaments are supplied by means of three small transformers. The plate supply employs a gas-filled rectifier tube. Voltmeter in a. c. supply line. Prices: No. 77, $150, including power unit; No. 88, $210 including power unit; No. 99, $285 including power unit and loud speaker. NO. 509. ALL-AMERICAN "DUET"; "SEXTET" Six tubes; 2 t. r. f. (99), detector (99), 3 transformer audio (99 and 12). Rice neutralized t. r. f. Two dials. Volume control: resistance in r. f. plate. Cabinet sizes: "Duet," 23 x 56 x 16Unches; "Sextet," 22} xl3} x 15} inches. Shielded. Output device. The 99 filaments are connected in series and supplied with rectified a. c; while 12 is supplied with raw a. c. The plate and filament supply uses gaseous rectifier tubes. Milliammeter on power unit. Prices: "Duet," $160 including power unit; "Sextet," $220 including power unit and loud speaker. NO. 511. ALL-AMERICAN 80, 90, AND 115 Five tubes; 2 t. r. f. (99), detector (99), 2 transformer audio (99 and 12). Rice neutralized t r. f. Two dials. Volume control: resistance in r. f. plate. Cabinet sizes: No. 80, 23} x 121 x 15 inches; No. 90, 37} x 12 x 12} inches; No. llo Hiboy, 24 x 41 x 15 inches. Coils individually shielded. Output device. See No. 509 for power supply. Prices: No. 80, $135 including power unit; No. 90, $145 including power unit and compartment; No. 115, $170 including power unit, compartment, and loud speaker. NO. 510. ALL-AMERICAN 7 Seven tubes; 3 t. r. f. (26), 1 untuned r. f. (26), detector (27), 2 transformer audio (26 and 71). Rice neutralized t. r. f. One drum. Volume control: resistance in r. f. plate. Cabinet sizes: "Sovereign" console, 30} x 60} x 19 inches; "Lorraine" Hiboy, 25} x 53 J x 17} inches; "Forte" cabinet, 25} x 13} x 17} inches. For filament and plate supply: See No. 508. Prices: "Sovereign" $460; "Lorraine" $360; "Forte" $270. All prices include power unit. First two include loud speaker. NO. 401, AM RAD AC9 Six tubes; 3 t. r. f. (99), detector (99), 2 transformer (99 and 12). Neutrodyne. Two dials. Volume control: resistance across 1st audio. Watts consumed: 50. Cabinet size: 27 x 9 x 11 j inches. The 99 filaments are connected in series and supplied with rectified a. c, while the 12 is run on raw a. c. The power unit, requiring two 16-B rectifiers, is separate and supplies A. B. and C current. Price $142 including power unit. NO. 402. AMRAD AC5 Five tubes. Same as No. 401 except one less r. f. stage. Price $125 including power unit. NO. 536. SOUTH BEND Six tubes. One control. Sub-panel shielding. Binding Posts. Antenna: outdoor. Prices: table, $130, Baby Grand Console, $195. NO. 537. WALBERT 26 Six tubes; five Kellogg a. c. tubes and one 71. Two controls. Volume control: variable plate resistance. Isofarad circuit. Output device. Battery cable. Semishielded. Antenna: 50 to 75 feet. Cabinet size: lOf x 29} x 16} inches. Prices: $215; with tubes, $2.50 NO. 484. BOSWORTH, B5 Five tubes; 2. t. r. f. (26), detector (99), 2 transformer audio (special a. c. tubes). T. r. f. circuit. Two dials. Volume control: potentiometer. Cabinet size: 23 x 7 x 8 inches. Output device included. Price $175. NO. 406. CLEARTONE 110 Five tubes; 2. t. r. f., detector, 2 transformer audio. All tubes a. c. heater type. One or two dials. Volume control: resistance in r. f. plate. Watts consumed: 40. Cabinet size varies. The plate supply is built in the receiver and requires one rectifier tube. Filament supply through step down transformers. Prices range from $175 to $375 which includes 5 a. c. tubes and one rectifier tube. NO. 407. COLONIAL 25 Six tubes; 2. t. r. f. (01-A), detector (99), 2 resistance audio (99). 1 transformer audio (10). Balanced t. r. f. circuit. One or three dials. Volume control: Antenna switch and potentiometer on 1st audio. Watts consumed: 100. Console size: 34 x 38 x 18 inches. Output device. All tube filaments are operated on a. c. except the detector which is supplied with rectified a. c. from the plate supply. The rectifier employs two 16-b tubes. Price $250 including built-in plate and filament supply. NO. 507. CROSLEY 602 BANDBOX Six tubes; 3. t. r. f. (26), detector (27), 2 transformer audio (26 and 71). Neutrodyne circuit. One dial, Cabinet size: 17} x 5} x 7J inches. The heaters for the a. c. tubes and the 71 filament are supplied by windings in B unit transformers available to operate either on 25 or 60 cycles. The plate current is supplied by means of rectifier tube. Price $65 for set alone, power unit $60. NO. 408. DAY-FAN "DE LUXE" Six tubes; 3 t. r. f., detector, 2 transformer audio. All 01-A tubes. One dial. Volume control: potentiometer across r. f. tubes. Watts consumed: 300. Console size: 30 x 40 x 20 inches. The filaments are connected in series and supplied with d. c. from a motor-generator set which also supplies B and C current. Output device. Price $350 including power unit. NO. 409. DAYCRAFT 5 Five tubes; 2 t. r. f., detector, 2 transformer audio. All a. c. heater tubes. Reflexed t. r. f. One dial. Volume control: potentiometers in r. f. plate and 1st audio. Watts consumed: 135. Console size: 34 x 36 x 14 inches. Output device. The heaters are supplied by means of a small transformer. A built-in rectifier supplies B and C voltages. Price $170, less tubes. The following have one more r. f. stage and are not reflexed; Daycraft 6, $195; Dayrole, 6, $235; Dayfan 6, $110. All prices less tubes. NO. 469. FREED-EISEMANN NRII Six tubes; 3 t. r. f. (01-A), detector (01-A), 2 transformer audio (01-A and 71). Neutrodyne. One dial. Volume control: potentiometer. Watts consumed: 150. Cabinet size: 19* x 10 x 10} inches. Shielded. Output device. A special power unit is included employing a rectifier tube. Price $225 including NR-411 power unit. NO. 487. FRESHMAN 7F-AC Six tubes; 3 t. r. f. (26), detector (27), 2 transformer audio (26 and 71). Equaphase circuit. One dial. Volume control: potentiometer across 1st audio. Console size: 24} x 41} x 15 inches. Output device. The filaments and heaters and B supply are all supplied by one power unit. The plate supply requires one 80 rectifier tube. Price $175 to $350, complete. NO. 421. SOVEREIGN 238 Seven tubes of the a. c. heater type. Balanced t. r. f. Two dials. Volume control: resistance across 2nd audio. Watts consumed: 45. Console size: 37 x 52 x 15 inches. The heaters are supplied by a small a. c. transformer, while the plate is supplied by means of rectified a. c. using a gaseous type rectifier. Price $325, including power unit and tubes. NO. 517. KELLOGG 510, 511, AND 512 Seven tubes; 4 t. r. f., detector, 2 transformer audio. All Kellogg a. c. tubes. One control and special zone switch. Balanced. Volume control: special. Output device. Shielded. Cable connection between power supply unit and receiver. Antenna: 25 to 100 feet. Panel 7\i x 27} inches. Prices: Model 510 and 512, consoles, $495 complete. Model 511, consolette, $365 without loud speaker. NO. 496. SLEEPER ELECTRIC Five tubes; four 99 tubes and one 71. Two controls. Volume control: rheostat on r. f. Neutralized. Cable. Output device. Power supply uses two 16-B tubes. Antenna: 100 feet. Prices: Type 64, table, $160; Type 65, table, with built-in loud speaker, $175; Type 66, table, $175; Type 67, console, $235; Type 78, console, $265. NO. 538. NEUTROWOUND MASTER ALLECTRIC Six tubes; 2 t. r. f. (01-A), detector (01-A), 2 audio (01-A and two 71 in push-pull amplifier). The 01-A tubes are in series, and are supplied from a 400-mA. rectifier. Two drum controls. Volume control: variable plate resistance. Output device. Shielded. Antenna: 50 to 100 feet Price: $360. NO. 413. MARTI Six tubes: 2 t. r. f., detector, 3 resistance audio. All tubes a. c. heater type. Two dials. Volume controlresistance in r. f. plate. Watts consumed: 38. Panel size 7 x 21 inches. The built-in plate supply employs one 16-B rectifier. The filaments are supplied by a small transformer. Prices: table, $235 including tubes and rectifier; console, $275 including tubes and rectifier; console, $325 including tubes, rectifier, and loud speaker. NO. 417 RADIOLA 28 Eight tubes; five type 99 and one type 20. Drum control. Super-heterodyne circuit. C-battery connections. Battery cable. Headphone connection. Antenna: loop. Set may be operated from batteries or from the power mains when used in conjunction with the model 104 loud speaker. Prices: $260 with tubes, battery operation; $570 with model 104 loud speaker, a. c. operation. NO. 540 RADIOLA 30-A Receiver characteristics same as No. 417 except that type 71 power tube is used. This model is designed to operate on either a. c. or d. c. from the power mains. The combination rectifier — power — amplifier unit uses two type 81 tubes. Model 100-A loud speaker is contained in lower part of cabinet. Either a short indoor or long outside antenna may be used. Cabinet size: 42} x 29 x 17£ inches. Price: $495. NO. 541. RADIOLA 32 This model combines receiver No. 417 with the model 104 loud speaker. The power unit uses two type 81 tubes and a type 10 power amplifier. Loop is completely enclosed and is revolved by means of a dial on the panel. Models for operation from a. c. or d. c. power mains. Cabinet size: 52 x 72 x 17| inches. Price: $895. NO. 539 RADIOLA 17 Six tubes; 3 t. r. f. (26), detector (27), 2 transformer audio (26 and 27). One control. Illuminated dial. Built-in power supply using type 80 rectifier. Antenna: 100 feet. Cabinet size: 25i5,j x H x 8i. Price: $130 without accessories. NO. 545. NEUTROWOUND, SUPER ALLECTRIC Five tubes; 2 t. r. f. (99), detector (99), 2 audio (99 and 71 ) . The 99 tubes are in series and are supplied from an 85-mA. rectifier. Two drum controls. Volume control: variable plate resistance. Output device. Antenna: 75 to 100 feet. Cabinet size: 9 x 24 x 11 inches. Price: $150. NO. 490. MOHAWK Six tubes; 2 t. r. f., detector, 2 transformer audio. All tubes a. c. heater type except 71 in last stage. One dial. Volume control: rheostat on r. f. Watts consumed: 40. Panel size: 12} x 8J inches. Output device. The heaters for the a. c. tubes and the 71 filament are supplied by small transformers. The plate supply is of the built-in type using a rectifier tube. Prices range from $65 to $245. NO. 522. CASE, 62B AND 62C McCullough a. c. tubes. Drum control. Volume control; variable high resistance in audio system. C-battery connections. Semi-shielded. Cable. Antenna: 100 feet. Panel size: 7 x 21 inches. Prices: Model 62B, complete with a. c. equipment, $185; Model 62 C, complete with a. c. equipment, $235. NO. 523. CASE, 92 A AND 92 C McCullough a. c. tubes. Drum control. Inductive volume control. Technidyne circuit. Shielded. Cable. C-battery connections. Model 92 C contains output device. Loop operated. Prices: Model 92 A, table, $350; Model 92 C, console, $475. Battery Operated Receivers NO. 542. PFANSTIEHL JUNIOR SIX Six tubes: 3 t. r. f. (01-A), detector (01-A), 2 audio. Pfanstiehl circuit. Volume control: variable resistance in r. f. plate circuit. One dial. Shielded. Battery cable. Cbattery connections. Etched bronze panel. Antenna: outdoor. Cabinet size: 9 x 20 x 8 inches. Price: $80, without accessories. NO. 512. ALL-AMERICAN 44, 45, AND 66 Six tubes; 3 t. r. f. (01-A, detector) 01-A, 2 transformer audio (01-A and 71). Rice neutralized t. r. f. Drum control. Volume control: rheostat in r. f. Cabinet sizes: No. 44, 21 x 10 x 8 inches; No. 55, 25 x 38 x 18 inches; No. 66, 27} x 43 x 20 inches. C-battery connections. Battery cable. Antenna: 75 to 125 feet. Prices: No. 44, $70; No. 55, $125 including loud speaker; No. 66, $200 including loud speaker. NO. 428. AMERICAN C6 Five tubes; 2 t. r. f. detector, 2 transformer audio. All 01-A tubes. Semi balanced t. r. f. Three dials. Plate current 15mA. Volume control: potentiometer. Cabinet sizes: table, 20 x 81 x 10 inches; console, 36 x 40 x 17 inches. Partially shielded. Battery cable. C-battery connections. Antenna: 125 feet. Prices: table, $30 console, $65 including loud speaker.