Tube Heterodyne Receiver Circuit

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Fig. 8.—Circuit diagram of a 7-tube automobile radio receiver, (Philco Lincoln-Zephyr L-1424.) This receiver is equipped ' with an electro-dynamic speaker, which is mounted on the rear of the instrument board extension. The volume control is automatic, a specially designed input circuit to match thetire compartment door antenna, and an elaborate filter network to reduce ignition noise disturbance is included. The receiver is designed for location under the front seat on the right side, which gives accessibility to all parts for service.

Fig. 8.—Circuit diagram of a 7-tube automobile radio receiver, (Philco Lincoln-Zephyr L-1424.) This receiver is equipped ' with an electro-dynamic speaker, which is mounted on the rear of the instrument board extension. The volume control is automatic, a specially designed input circuit to match thetire compartment door antenna, and an elaborate filter network to reduce ignition noise disturbance is included. The receiver is designed for location under the front seat on the right side, which gives accessibility to all parts for service.

Model Radio Construction

Fig. 9.—Schematic wiring diagram of a 6-tube 2-band a.c.-d.c. radio receiver. (Majestic Model-60.) The set is designed to operate on 105 to 125 volts, 50-60 cycles a.c. or i.e. I.f. peak 456 kilocycles "B" supply voltage B+ to chassis (ground) = 106 volts. "B" supply voltage B+ toB— (line) = 121 volts. Voltage across filter choke (in negative lead) chassis ground to B — = 16.5 volts. Voltage across pilot lights approximately 4.8 volts each. These voltages will be approximately ten per cent lower for 115 veits i.e. power supply.

Fig. 9.—Schematic wiring diagram of a 6-tube 2-band a.c.-d.c. radio receiver. (Majestic Model-60.) The set is designed to operate on 105 to 125 volts, 50-60 cycles a.c. or i.e. I.f. peak 456 kilocycles "B" supply voltage B+ to chassis (ground) = 106 volts. "B" supply voltage B+ toB— (line) = 121 volts. Voltage across filter choke (in negative lead) chassis ground to B — = 16.5 volts. Voltage across pilot lights approximately 4.8 volts each. These voltages will be approximately ten per cent lower for 115 veits i.e. power supply.

Vibrator Power Supply Diagrams

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Fig. 10.—Circuit wiring diagram of a 6-tube automobile radio receiver. (Philco-Packard P-1432H.) The receiver is designed for installation above the steering column of the car. Special knockouts are provided in the dash for the receiver in all model 115-C and 120-C Packard cars. These plugs are easily removed with a screwdriver. The electrodynamic speaker is designed for location behind the header bar cloth directly above the rear vision mirror. All closed cars are equipped with a roof-type antenna, with the lead-in brought down inside the left front pillar post and coiled behind the cowl trim panel.

Fig. 10.—Circuit wiring diagram of a 6-tube automobile radio receiver. (Philco-Packard P-1432H.) The receiver is designed for installation above the steering column of the car. Special knockouts are provided in the dash for the receiver in all model 115-C and 120-C Packard cars. These plugs are easily removed with a screwdriver. The electrodynamic speaker is designed for location behind the header bar cloth directly above the rear vision mirror. All closed cars are equipped with a roof-type antenna, with the lead-in brought down inside the left front pillar post and coiled behind the cowl trim panel.

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Chrysler Vision 1994 Wiring Diagram

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Fio. 11.—Schematic wiring diagram of a 6-tube superheterodyne automobile radio receiver. (Philco-Chrysler-Dodge-Plymouth-DeSoto Model C-1452.) The receiver is furnished with an electrodynamic speaker which is installed together with the receiver on the da»h directly behind the steering column. Due to the fact that all late model cars have a steel roof, a separate external antenna must be used. The antenna may be either the "Roadway Dual" type which is installed under the running board or the "Skyway" type which is installed on the left side of the cowl and can be extended to meet varying conditions in the . field.

Radio Tube Circuts

Fig. 12.—Circuit diagram of a 5-tube, 2-band a.c. superheterodyne receiver. (R.C.A. Victor 5T6, 5T7, 5T8.) Their design includes magnetic core adjusted i.f. transformers and wave trap; aural-compensated volume control; high-frequency tone control; resistance coupled audio system; phonograph terminal board; illuminated, band-indicating dial pointers; and a six-inch, dust-proof, electro-dynamic loudspeaker. Frequency ranges: Standard broadcast:540—1,820 kilocycles. Short wave: 1,820-6,600 kilocycles.

Fig. 12.—Circuit diagram of a 5-tube, 2-band a.c. superheterodyne receiver. (R.C.A. Victor 5T6, 5T7, 5T8.) Their design includes magnetic core adjusted i.f. transformers and wave trap; aural-compensated volume control; high-frequency tone control; resistance coupled audio system; phonograph terminal board; illuminated, band-indicating dial pointers; and a six-inch, dust-proof, electro-dynamic loudspeaker. Frequency ranges: Standard broadcast:540—1,820 kilocycles. Short wave: 1,820-6,600 kilocycles.

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Schematic Diagram Standard Radio

Fig. 13.—Circuit diagram of an 8-tube, 3-band a.c. superheterodyne radio-phonograph. (R.C.A. Victor 8U2.) This radio-phonograph combination consists of an 8-tube radio receiver and a manually operated phonograph combined in one cabinet. The superheterodyne circuit is used with such features of design as improved antenna wave-trap; an r./. amplifier stage; all metal tubes; aurally-compensated volume control; 3-position tone control with music-speech switch; automatic volume control; resistance-coupled audio system; tuning tube; "Magic Eye"; edge-lighted band indicator dial, and a dust-proof electrodynamic loudspeaker. Trimming adjustments are located at accessible points. Their, number is reduced to the least that is consistent with efficient operation. The tuning dial ratio of 10 to 1 with a 50 to 1 vernier permits ease of tuning, especially in "the "short-wave" band. Frequency ranges: Long wave 155-320 kilocycles. Medium wave 530-1,500 kilocydes. Short wave 5,400-18,000 kilo-cydes. Intermediate frequency 460 kilocydes.

Fig. 13.—Circuit diagram of an 8-tube, 3-band a.c. superheterodyne radio-phonograph. (R.C.A. Victor 8U2.) This radio-phonograph combination consists of an 8-tube radio receiver and a manually operated phonograph combined in one cabinet. The superheterodyne circuit is used with such features of design as improved antenna wave-trap; an r./. amplifier stage; all metal tubes; aurally-compensated volume control; 3-position tone control with music-speech switch; automatic volume control; resistance-coupled audio system; tuning tube; "Magic Eye"; edge-lighted band indicator dial, and a dust-proof electrodynamic loudspeaker. Trimming adjustments are located at accessible points. Their, number is reduced to the least that is consistent with efficient operation. The tuning dial ratio of 10 to 1 with a 50 to 1 vernier permits ease of tuning, especially in "the "short-wave" band. Frequency ranges: Long wave 155-320 kilocycles. Medium wave 530-1,500 kilocydes. Short wave 5,400-18,000 kilo-cydes. Intermediate frequency 460 kilocydes.

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Fig. 14.—Circuit diagram of a 6-tube all-wave a.c. superheterodyne receiver. (Emerson Model S-147, S-151) »./. peaked at 456 kilocycles. Voltage rating 105-125 volts. Current drain 0.55 amperes. Frequency ranges 550 to 1,750 kilocycles: 1,750 to 5,500 kilocycles; 5.7 to 18.0 megacycles.

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Fig. 14.—Circuit diagram of a 6-tube all-wave a.c. superheterodyne receiver. (Emerson Model S-147, S-151) »./. peaked at 456 kilocycles. Voltage rating 105-125 volts. Current drain 0.55 amperes. Frequency ranges 550 to 1,750 kilocycles: 1,750 to 5,500 kilocycles; 5.7 to 18.0 megacycles.

6a7 Tube Radio

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Fig. 15.—Circuit diagram of a 6-tube' Police automobile radio receiver. (Pbilco Model DPV.) This model is a superheterodyne, single unit receiver designed for operation on the standard emergency police frequency as allotted by the Federal Radio. Commission. The tubes are all of the 6.3 volt type especially developed for auto radio service. There is a 39-44 tube in the r.f. stage, a 6A7 tube in the detectof'oscillator stage, a 44 in the»./. stage, a 75-tube in the 2nd detector and 1st audio stage, a 42 tube in the output and an 84 rectifier tube in the power supply. The receiver is "all electric" operating entirely from the auto battery. The "B" poweris supplied by the vibrator shown at 64 in the diagram.

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Fig. 15.—Circuit diagram of a 6-tube' Police automobile radio receiver. (Pbilco Model DPV.) This model is a superheterodyne, single unit receiver designed for operation on the standard emergency police frequency as allotted by the Federal Radio. Commission. The tubes are all of the 6.3 volt type especially developed for auto radio service. There is a 39-44 tube in the r.f. stage, a 6A7 tube in the detectof'oscillator stage, a 44 in the»./. stage, a 75-tube in the 2nd detector and 1st audio stage, a 42 tube in the output and an 84 rectifier tube in the power supply. The receiver is "all electric" operating entirely from the auto battery. The "B" poweris supplied by the vibrator shown at 64 in the diagram.

Tube Auto Radio

Fig. 16.—Circuit diagram of a 6-tube automobile radio receiver. (Ford-Pbilco F-H42.) The function of the vibrator (shown at 71) is to interrupt the direct current voltage produced by the storage battery, and so enabling the transforming of the current to a higher voltage by means of transformer (shown at 63). The reconverting to direct current is accomplished at the rectifier —A filtering at 65 and 66.

Fig. 16.—Circuit diagram of a 6-tube automobile radio receiver. (Ford-Pbilco F-H42.) The function of the vibrator (shown at 71) is to interrupt the direct current voltage produced by the storage battery, and so enabling the transforming of the current to a higher voltage by means of transformer (shown at 63). The reconverting to direct current is accomplished at the rectifier —A filtering at 65 and 66.

Zenith 6g660 Radio Wiring Diagram

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Fig. 17.—Schematic wiring diagram of a 5-tube, 2-band a.c.-d.c. radio receiver.- (Majestic Model 50.) Operating voltage 105 to 125; a.c. or d.c. /./. frequency 456 kilocycles. Broadcast band 540 to 1,550 kilocycles. Police band 1,550 to 4,000 kilocycles.

Receiver Heterodyne Medium Wave
Fig. 18.—Pictorial wiring diagram of General Electric Model H31 screen grid super-heterodyne receiver.
7tube Receive Battery Portable

Fig 19 —Schematic circuit diagram of a 12-tube superheterodyne, 3-band radio receiver. (Zenith Models 12-S-205, 12-S-232, 12-S-245, 12-S-265, 12-S-266, 12-S-267, 12-S-268.) /./. frequency 450 kilocycles. Line voltage 117 volts o.e. 50 to 60 cycles. Power consumption 110 watts.

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Fig. 20.—Circuit diagram of a 5-tube combination phonograph and dual-wave superheterodyne receiver. (Emerson Model L-143.) /./. peaked at 456 kilocycles. Voltage rating 105 to 125 volts a.c. Current drain 0.5 amperes for receiver. Frequency range 540 to 1,750 kilocycles—2,200 to 7,500 kilocycles. Speed of phonograph motor 78 r.p.m. at 105 to 125 volts, 60 cycle a.c. supply.

position no.t—shout wave

Fig. 20.—Circuit diagram of a 5-tube combination phonograph and dual-wave superheterodyne receiver. (Emerson Model L-143.) /./. peaked at 456 kilocycles. Voltage rating 105 to 125 volts a.c. Current drain 0.5 amperes for receiver. Frequency range 540 to 1,750 kilocycles—2,200 to 7,500 kilocycles. Speed of phonograph motor 78 r.p.m. at 105 to 125 volts, 60 cycle a.c. supply.

Heterodyne Receiver Schematic

Fig. 21.—Schematic circuit diagram of a 6-tube, 2-band a.c. superheterodyne receiver. (General Electric Models F-63, F-65 and F-66.) Intermediate frequency 456 kilocycles. Tuning frequency range: Band "B," 540-1,750 kilocycles. Band "C," 2.2-7.0 megacycles. Power consumption 70 watts at 115-125 volts. 4-point tone control; electrodynamic loudspeaker.

Fig. 21.—Schematic circuit diagram of a 6-tube, 2-band a.c. superheterodyne receiver. (General Electric Models F-63, F-65 and F-66.) Intermediate frequency 456 kilocycles. Tuning frequency range: Band "B," 540-1,750 kilocycles. Band "C," 2.2-7.0 megacycles. Power consumption 70 watts at 115-125 volts. 4-point tone control; electrodynamic loudspeaker.

All Transistor Radio Circuits Diagram

Fig. 22.—Schematic circuit diagram of an all-wave radio receiver and phonograph combination. 7-tube a.c. superheterodyne. (General Electric Model E-79.) Tuning frequency range: "Band B," 540-1,600 kilocycles. Band "C," 1,560-5,800 kilocycles. Band "D," 5.6-18.0 megacycles (5,600-18,000 kilocycles). Power consumption 105 watts at 115 volts. Speed of phonograph motor 78 r.p.rn. at 115 volt, 60 cycles, a.c.

Fig. 22.—Schematic circuit diagram of an all-wave radio receiver and phonograph combination. 7-tube a.c. superheterodyne. (General Electric Model E-79.) Tuning frequency range: "Band B," 540-1,600 kilocycles. Band "C," 1,560-5,800 kilocycles. Band "D," 5.6-18.0 megacycles (5,600-18,000 kilocycles). Power consumption 105 watts at 115 volts. Speed of phonograph motor 78 r.p.rn. at 115 volt, 60 cycles, a.c.

Dio General Electric 260 Schematic

Fig. 23.—Schematic circuit diagram of a 6-voIt synchronous vibrator radio receiver. 5-tube, 2-band (General Electric Models U51 and U55). Intermediate frequency 456 kilocycles. Tuning frequency range: "B" range—528-1,730 kilocycles. "D" range, 5,650-16,000 kilocycles. Power consumption 1.1 amperes at 6.3 volts.

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Fig. 23.—Schematic circuit diagram of a 6-voIt synchronous vibrator radio receiver. 5-tube, 2-band (General Electric Models U51 and U55). Intermediate frequency 456 kilocycles. Tuning frequency range: "B" range—528-1,730 kilocycles. "D" range, 5,650-16,000 kilocycles. Power consumption 1.1 amperes at 6.3 volts.

Fig. 24.—Schematic circuit diagram of a 15-tube superheterodyne 4-band radio receiver. (Zenith Models 15-U-246, 15-U-269 15-U-270, 15-U-271, 15-U-272, 15-U-273.) I.f. frequency 456 kilocycles. Line voltage 117 volts a.c. 50 to 60 cycles. Power consumption 160 watts.
5 TUBE COMBINATION

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Fig. 25.—Schematic diagram of a 5 tube radio-phonograph receiver. (Emerson Model CJ-221.) Voltage rating 105—125 volts; power consumption 30 watts and 20 watts for the 78 r.p.m. phonograph motor. The frequency range is from 540 to 1,780 k.c.

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Fig. 26.—Schematic circuit diagram of a 5 tube superheterodyne radio-phonograph combination. (Stromberg-Carlson Model 411.) This receiver has a tuning range of 51,0 to 1,700 k.c. and 6,800 to 18,000 k.c. The voltage rating is 105 to 125 volts, 50 to 60 cycles; input power rating 52 watts; intermediate frequency 455 k.c. The phonograph motor delivers the usual 78 r.p.m. to the turntable, and is connected to the socket after the main cut-out switch. A phono-jack on the front of the cabinet facilitates the connection to a set of head-phones.

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Fig. 26.—Schematic circuit diagram of a 5 tube superheterodyne radio-phonograph combination. (Stromberg-Carlson Model 411.) This receiver has a tuning range of 51,0 to 1,700 k.c. and 6,800 to 18,000 k.c. The voltage rating is 105 to 125 volts, 50 to 60 cycles; input power rating 52 watts; intermediate frequency 455 k.c. The phonograph motor delivers the usual 78 r.p.m. to the turntable, and is connected to the socket after the main cut-out switch. A phono-jack on the front of the cabinet facilitates the connection to a set of head-phones.

Philco Tube 312

Fig. 27.—Circuit diagram of a 6 tube push button and dial tuned super-heterodyne radio receiver. (Philco Model 40-160.) The receiver has incorporated a built-in aerial which reduces local static interference to a minimum. This model is also designed to receive sound and television programs tuned in by a special type Philco Television set. Additional features are: Tone control; two tuning ranges covering BJfl to 1,550 and 1,550 to S,S50 k.c.; pentode audio output circuit; provision for outside aerial connection for remote localities where station signal strength is very weak. Five of the push buttons are used for broadcast stations and one for selecting dial tuning. Power supply 115 V. 25 and 60 cydes; power consumption 45 watts; audio output 2 watts.

Fig. 27.—Circuit diagram of a 6 tube push button and dial tuned super-heterodyne radio receiver. (Philco Model 40-160.) The receiver has incorporated a built-in aerial which reduces local static interference to a minimum. This model is also designed to receive sound and television programs tuned in by a special type Philco Television set. Additional features are: Tone control; two tuning ranges covering BJfl to 1,550 and 1,550 to S,S50 k.c.; pentode audio output circuit; provision for outside aerial connection for remote localities where station signal strength is very weak. Five of the push buttons are used for broadcast stations and one for selecting dial tuning. Power supply 115 V. 25 and 60 cydes; power consumption 45 watts; audio output 2 watts.

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SCHEMATIC DIAGRAM

Fig. 2 8.-^-Schematic circuit diagram of an A.C.-D.C. portable super-heterodyne receiver. (Emerson DJ-310-311-312.) The circuit has a frequency range of from 540 to 1,600 k.c.; contains 6 tubes and can be operated from self-contained batteries as .well as from a 110 volt 60 cycle A.C. source. The power consumption is 30 watts. It has a built-in antenna, with provision for connection to an external antenna and ground if desired.

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SCHEMATIC DIAGRAM

Fig. 2 8.-^-Schematic circuit diagram of an A.C.-D.C. portable super-heterodyne receiver. (Emerson DJ-310-311-312.) The circuit has a frequency range of from 540 to 1,600 k.c.; contains 6 tubes and can be operated from self-contained batteries as .well as from a 110 volt 60 cycle A.C. source. The power consumption is 30 watts. It has a built-in antenna, with provision for connection to an external antenna and ground if desired.

7tube Receive Battery Portable

Fig. 29.—Circuit diagram of a 6 tube A.C. superheterodyne receiver. (Philco Model 40-140, 40-145.) The receiver has a built-in aerial system which reduces static and interference to a minimum. The frequency coverage in kilo-cycles on each of the five push buttons are: 6A0 to 1,080; 650 to 1,100; 740 to 1,300; 900 to 1,470 and 1,160 to 1,600 respectively. Intermediate frequency 456 k.c.; power supply, 115 volts, 60 cycle; power consumption 38 watts; audio output £ watts.

Fig. 29.—Circuit diagram of a 6 tube A.C. superheterodyne receiver. (Philco Model 40-140, 40-145.) The receiver has a built-in aerial system which reduces static and interference to a minimum. The frequency coverage in kilo-cycles on each of the five push buttons are: 6A0 to 1,080; 650 to 1,100; 740 to 1,300; 900 to 1,470 and 1,160 to 1,600 respectively. Intermediate frequency 456 k.c.; power supply, 115 volts, 60 cycle; power consumption 38 watts; audio output £ watts.

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Superheterodyne Receiver Circuits

Yio. 30.—Circuit diagram of a 7-tube A.C. superheterodyne receiver. (Stromberg-Carlson No. 420.) The circuit tuning ranges are from 540 to 1,700 k.c. and 6,800 to 18,000 k.c. Voltage rating 105-125 volts; 50-60 cycles; intermediate frequency 4So kilo-cycles; input power rating 57 watts. A special socket is provided in the rear of the chassis into which a record player may be plugged and a switch is provided on the front of the chassis for switching from radio to phonograph. Switching to phonograph also makes the audio amplifier and loud speaker available for use with television receivers, designed for this type of sound reproduction.

7tube Receive Battery Portable

Fig. 31.—Schematic diagram of an eight-tube frequency modulation, radio receiver and converter. (Stromberg-Carlson No. 425.) This receiver is designed for the reception of "frequency modulated" broadcasting stations only, and features the popular Armstrong wide-swing frequency modulation system, making possible virtual static and noise free reception, which in addition to extreme high fidelity makes it an outstanding radio development. At present the Federal Communications Commission has established five channels between 40 and 44 megacycles for frequency modulated transmitting stations. Since this is a comparatively high frequency, the distance over which reception is possible is limited. It should in addition be noted that the fidelity may-be . limited by telephone, lines, or by program transcriptions, although this condition will, undoubtedly, be improved as time goes on. The circuit type is a frequency modulation—super-heterodyne. Tuning range 40 to 44 megacycles (7.5 to 6.82 meters); input power rating at 120 volts, 79 watts; intermediate frequency 2.1 megacycles (2,100 kilo-cycles).

Fig. 31.—Schematic diagram of an eight-tube frequency modulation, radio receiver and converter. (Stromberg-Carlson No. 425.) This receiver is designed for the reception of "frequency modulated" broadcasting stations only, and features the popular Armstrong wide-swing frequency modulation system, making possible virtual static and noise free reception, which in addition to extreme high fidelity makes it an outstanding radio development. At present the Federal Communications Commission has established five channels between 40 and 44 megacycles for frequency modulated transmitting stations. Since this is a comparatively high frequency, the distance over which reception is possible is limited. It should in addition be noted that the fidelity may-be . limited by telephone, lines, or by program transcriptions, although this condition will, undoubtedly, be improved as time goes on. The circuit type is a frequency modulation—super-heterodyne. Tuning range 40 to 44 megacycles (7.5 to 6.82 meters); input power rating at 120 volts, 79 watts; intermediate frequency 2.1 megacycles (2,100 kilo-cycles).

Tube Comunication Receiver Schematic

Fig. 32.—Schematic circuit diagram for a 4 tube superheterodyne portable radio receiver. (Stromberg-Carlson Model 402.) The power supply consists of one 1.5 volt A battery and 2—45 volt B batteries, inter-connected as shown. The tuning ranpe is from B60 to 1,680 k.c.; intermediate frequency J,B5 k.c. A loop antenna is built in so that no outside connections are required. This receiver may, however, be connected to a regular antenna and ground if desired, from special binding posts provided on the bottom of the cabinet. (A single wire antenna about 75 ft. long should be most satisfactory.) In order to avoid battery drain the dial is so designed that no pilot light is necessary and an indicator shows "Red" when the set is turned "On" and reads "Off" when the set is turned off.

Fig. 32.—Schematic circuit diagram for a 4 tube superheterodyne portable radio receiver. (Stromberg-Carlson Model 402.) The power supply consists of one 1.5 volt A battery and 2—45 volt B batteries, inter-connected as shown. The tuning ranpe is from B60 to 1,680 k.c.; intermediate frequency J,B5 k.c. A loop antenna is built in so that no outside connections are required. This receiver may, however, be connected to a regular antenna and ground if desired, from special binding posts provided on the bottom of the cabinet. (A single wire antenna about 75 ft. long should be most satisfactory.) In order to avoid battery drain the dial is so designed that no pilot light is necessary and an indicator shows "Red" when the set is turned "On" and reads "Off" when the set is turned off.

CHAPTER 15

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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