Radio Broadcast (Nov 1926-Apr 1927)

Record Details:

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492 RADIO BROADCAST MARCH, 1927 THE LIST OF PARTS Ti — Amertran Transformer, Type PF-52 ....... $18.00 Ri — Amertran No. 400 Resistor . Li, L2, L3 — Three Amerchokes, Type No. 854 T2, T3 — Two Amertran Deluxe Transformers R2, R.i, R4— Three Clarostats . . Ri — Elkay No. 4 Equalizor and Mounting L4, Ls — Two Samson Audio Chokes, No. 3 Re — Lynch Fixed Resistor, o. 1 Megohms Ci, C2, C3 — Three Tobe i-Mfd. Bypass Condensers, No. 301 7.50 12.00 20. 00 6.75 •75 6 00 • 75 3-75 Radio Broadcast Photograph POWER TRANSFORMER Loud Speaker C7 O O SECOND STAGE TRANSFORMER T3 Ci, C5, Cg, G — Four Tobe 4-Mfd Power Pack Condensers, No 604 .... Cs — Tobe 2-Mfd. Power Pack Condenser, No. 602 Carter Short Jack . Eveready C Battery, No. 771 Six Binding Posts, with Strip Three Airgap Sockets . Base-Board ux-210 Tube . ux-201-A Tube ux-216-B Rectifier Tube Lynch Single Resistor Mounting Total . . . . FIRST STAGE TRANSFORMER 28.00 4.00 • 25 .60 1 .00 2.25 ■75 9.00 > -75 7.50 ■35 Si 30.95 (Ground Transformer and Condenser Cases) B + Detector A HIGH-VOLTAGE A.C. OPERATED POWER AMPLIFIER Which employs the 216-B as a rectifier and a 210 power tube in the last stage. Filament current is supplied from the a. c. mains for the last tube, as is also the grid voltage. The circuit gives the connection and values of the different apparatus. A preferred arrangement of this amplifier, using an ux-171 output tube, was shown in the upper box on page 385 of the February Radio Broadcast THE LIST OF PARTS Ti — General Radio Power Transformer Unit. Type 391 Ci — General Radio Condenser Block, Type 392 Li — General Radio Choke Block, Type 366 Ri — General Radio Voltage Tap Resistance, Type 393A T2 — General Radio Input Audio Transformer, Type 285 T3 — General Radio Output Transformer, Type 367 2 Sockets Sw— 1 D. P. D. T. Snap Switch 7 Binding Posts, with Terminal Strip 1 Base-board 1 Attachment Plug and Cord 1 ux-171 Tube I ux-213 Tube These parts may be obtained in kit form, price S47.50 without tubes Connect to all cases Output Input 110-V A C A ONE-STAGE AMPLIFIER-POWER SUPPLY DEVICE Kmploying an ux-213 tube as a rectifier and an ux-171 as an amplifier tube. Plate current is supplied for the tubes in the main part of the receiver. The various elements enclosed in dotted lines in the circuit diagram indicate that such may be obtained in one unit. The photograph shows the general layout of the amplifier unit. This amplifier is particularly adaptable to the "Universal" Receiver