Radio Circuit Diagrams

Electronic Tube Radio Schematic

Fig. 1.—Schematic wiring diagram of a 4-tube Handy-phone for inter-office communication. (Model FM-41 General Electric.) The handy phone is an efficient loudspeaker phone system for use in offices, homes, hospitals or other places where voice,communication between a central station and one of more remote stations is desirable. The system comprises one Model FM-41 master station and from one,to four Moddl FS-5 remote speaker phone stations. The master station employs four General Electric tubes in a three-stage audio amplifier circuit, with power supply. When it is desired to operate over a distance of more than 2,000 feet, standard line transformers may be used, procurable from any radio supply house. The transformers should be designed to operate from a five-ohm source into a line of 200, 500 or 600 ohms impedance. The system may be operated from either a.c. or i.e. power supply. When the system is operated from an a.c. source, all d.c. potentials are supplied by the rectifier tube 25Z5 and its associated filter circuits. Whên the system is operated from a d.c. source it is necessary to insert the plug with proper polarity. If the unit fails to function after allowing time for the tubes to reach their proper operating temperature, the power plug should be reversed in the receptacle. - /

Fig. 1.—Schematic wiring diagram of a 4-tube Handy-phone for inter-office communication. (Model FM-41 General Electric.) The handy phone is an efficient loudspeaker phone system for use in offices, homes, hospitals or other places where voice,communication between a central station and one of more remote stations is desirable. The system comprises one Model FM-41 master station and from one,to four Moddl FS-5 remote speaker phone stations. The master station employs four General Electric tubes in a three-stage audio amplifier circuit, with power supply. When it is desired to operate over a distance of more than 2,000 feet, standard line transformers may be used, procurable from any radio supply house. The transformers should be designed to operate from a five-ohm source into a line of 200, 500 or 600 ohms impedance. The system may be operated from either a.c. or i.e. power supply. When the system is operated from an a.c. source, all d.c. potentials are supplied by the rectifier tube 25Z5 and its associated filter circuits. Whên the system is operated from a d.c. source it is necessary to insert the plug with proper polarity. If the unit fails to function after allowing time for the tubes to reach their proper operating temperature, the power plug should be reversed in the receptacle. - /

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SPEJJER PLUS LOOKINa AT PINS. SEE ENCtRtLEO "UMBERS ON SCHEMATIC FOR CONNECTION*.

Fig. 2.—Schematic wiring diagram of a 6-tube o.e. dual-wave superheterodyne receiver- (Emerson Models, AR-171, AR-173, AR-174, AR-176, AR-180, AR-185, AT-170, AT-172, AT-181) i.f. peaked at 456 kilocycles. Voltage rating 105-126 volts o.e. Power consumption 55 watts. Frequency ranges 540 to 1,730 kilocycles and 5.6 to 18 megacycles.

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SPEJJER PLUS LOOKINa AT PINS. SEE ENCtRtLEO "UMBERS ON SCHEMATIC FOR CONNECTION*.

Fig. 2.—Schematic wiring diagram of a 6-tube o.e. dual-wave superheterodyne receiver- (Emerson Models, AR-171, AR-173, AR-174, AR-176, AR-180, AR-185, AT-170, AT-172, AT-181) i.f. peaked at 456 kilocycles. Voltage rating 105-126 volts o.e. Power consumption 55 watts. Frequency ranges 540 to 1,730 kilocycles and 5.6 to 18 megacycles.

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Sir Amp Schematic

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6A80 Converter 6.3 6K7G I. F. Amplifier 6.3 6H6G Detector—AVC 6.3 «F6G Audio Amplifier 6.3 6K6G Power Output 6.3 5Y3G BeeUSer 6.9

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Fig. 3.—Schematic wiring diagram of a 6-tube, 2-band a.c. radio receiver. (Majestic-620.) The set is designed to operate on 110-115 volts, 50-60 cycles. /./. peak 456 kilocycles. '

RANGE S&L6-CTOR SHOWN IN STANDARD BROADCAST POSITION

Rca Victor 18t Wiring Diagram

Fig. 4.—Circuit diagram of a 5-tube, 2-band a.c. superheterodyne receiver. R.C.A. Victor Model 5T1. Its design includes magnetic-core adjusted i.f. transformers and wave-trap; aural-compensated volume control; two-point high frequency tor« .control; automatic volume control; resistance coupled audio system; phonograph terminal board; and a six-inch, dust-proof, electro-dynamic loudspeaker. Frequency ranges: "Standard broadcast" 540—1,820 kilocycles. Short wave—1,820-6,600 kilocycles.

RANGE S&L6-CTOR SHOWN IN STANDARD BROADCAST POSITION

Fig. 4.—Circuit diagram of a 5-tube, 2-band a.c. superheterodyne receiver. R.C.A. Victor Model 5T1. Its design includes magnetic-core adjusted i.f. transformers and wave-trap; aural-compensated volume control; two-point high frequency tor« .control; automatic volume control; resistance coupled audio system; phonograph terminal board; and a six-inch, dust-proof, electro-dynamic loudspeaker. Frequency ranges: "Standard broadcast" 540—1,820 kilocycles. Short wave—1,820-6,600 kilocycles.

Superhet Receiver Amateur Band

Fig. 5.—Schematic circuit diagram of a 6-tube superheterodyne, 3-band radio receiver. (Zenith Models, 6-S-203,6-S-222,6S-223, 6S-229, 6S-239, 6S-241.) I.f. frequency, 456 kilocycles. In locations subject to code interference adjust wave trap marked (E) for minimum interference with antenna connected and receiver operating in broadcast band. Line voltage 117 volts, a.c. 50 to 60 cycles. Power consumption 65 watts.

Fig. 5.—Schematic circuit diagram of a 6-tube superheterodyne, 3-band radio receiver. (Zenith Models, 6-S-203,6-S-222,6S-223, 6S-229, 6S-239, 6S-241.) I.f. frequency, 456 kilocycles. In locations subject to code interference adjust wave trap marked (E) for minimum interference with antenna connected and receiver operating in broadcast band. Line voltage 117 volts, a.c. 50 to 60 cycles. Power consumption 65 watts.

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1974 Superheterodyne Receiver Schematic

Fig. 6.—Schematic wiring diagram of a 6-tube automobile radio receiver. (Philco-Nash N-1434-H.) The speaker of the elec-trodynamic type is designed for mounting on a frame in the center above the windshield. For installation of the receiver mounting holes are provided in the left hand side of the dash. Since all late cars have an all-metal roof it is necessary to install either a cowl extension »ntenna or an under the car antenna. The under car antenna is installed beneath the running boards.

Fig. 6.—Schematic wiring diagram of a 6-tube automobile radio receiver. (Philco-Nash N-1434-H.) The speaker of the elec-trodynamic type is designed for mounting on a frame in the center above the windshield. For installation of the receiver mounting holes are provided in the left hand side of the dash. Since all late cars have an all-metal roof it is necessary to install either a cowl extension »ntenna or an under the car antenna. The under car antenna is installed beneath the running boards.

Superhet Amateur Band Tube Battery
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