General-Electric-Co-GD60 电路原理图.pdf
MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS General Electric nodel GD-60 * Used on early production receivers only. For replacement purposes, use specified volume control and omit R-13 _Description_ Wave Trap Trimmer, 45-145 Mmf. Selector Trimmer, 100-510 Mmf. Selector Trimmer, 75-410 Mmf. Selector Trimmer, 50-300 Mmf. Selector Trimmer, 50-300 Mm Selector Trimmer, 20-200 Mm Selector Trimmer, 60-300 MmT Selector Trimmer, 60-300 Mmf Selector Trimmer, 20-200 Mm Selector Trimmer, 20-200 Mmf. Selector Trimmer, 10-100 Mmf. Tuning Condenser Ant. Tuning Condenser Osc. Mica Capacitor, 47 Mmf. Paper Capacitor, .25 Mfd. Trimmer Capacitor, 50-135 Mmf. Trimmer Capacitor, 50-135 Mmf. Paper Capacitor, .26 Mfd, Paper Capacitor, 0.6 Mfd. _Description_ Trimmer Capacitor. 50-136 Mmf. Trimmer Capacitor, 50-135 MmL Mica Capacitor, 470 Mmf. Paper Capacitor, .002 Mfd. Paper Capacitor, .002 Mfd, Mica Capacitor, 330 Mmf. Paper Capacitor, .15 Mfd. Paper Capacitor, .005 Mfd. Paper Capacitor. .93 Mfd. Paper Capacitor. .001 Mfd. Dry Electrolytic Cap., 12 Mfd. Dry Electrolytic Cap., 20 Mfd. Paper Capacitor, .02 Mfd. Carbon Resistor, 47,000 Ohms Carbon Resistor, 10,000 Ohms Ballast Tube 49-A, 170 Ohms Carbon Resistor, 2.2 Megohms Carbon Resistor, 470,000 Ohms Volume Control. 2 Megohms _Description_ Carbon Resistor, 15 Megohms Carbon Resistor. 220,000 Ohms Carbon Resistor, 470,000 Ohms Carbon Resistor. 270.000 Ohms Carbon Resistor, 68,000 Ohms Carbon Resistor, 68,000 Ohms Antenna Switch Oscillator Switch Power Switch combined with R-6 1st I.F. Transformer 2nd I.F. Transformer Output Transformer Oscillator Transformer Antenna Transformer Hum Buck Coil Voice Coil Field Coil450 Ohms (cold) -In some receivers a 150,000 to 390.000 ohm resistor is connected across C-18. GENERAL INFORMATION Model GD-6() is a compact, six-tube AC-DC superhetero dyne receiver, employing six General Electric Pre-tested Tubes as described above, in a superhetero(ne circuit. It incorporates a simplified trimmer tuned “Touch-Tuning system, allowing a set up of five stations for automatic tunmg. Other features of desig:n include I.F. wave trap, automatic volume control and an improved dustproof speaker. I.F. Alignment Connect an output meter across the voice coil. Set the volume control for maximum. Set test oscillator to 455 and apply signal to the control grid of the 6A8G tube through a .05 mfd. capacitor. Do not remove the grid lead from the 6A8G and keep the test oscil lator output as low as possible to give a readable output. Adjust all four I F. trimmers for maximum output. Wave Trap Alignment Leave the test oscillator set to 455 K.C. and connect one output lead to the receiver chassis and the other through a 250 mmf. capacitor in series with 200 ohms to the receiver antenna lead. Adjust (C-1) for minimum output. R.F. Alignment Use the same dummy antenna (250 mmf. and 200 ohms) with 1500 K.C. input, adjust the oscillator trimmer (C-13) and antenna trimmer (C-12) for a maximum output. PrecautionOne side of the power supply is connected to the chassis through a .25 mfd. capacitor. If signal generator is AC operated, connect a .05 mfd. capacitor in the ground side before connecting it to the receiver chassis. Tuning Frequency Range.540-1750 K.C. Intermediate Frequency.455 K.C. Electrical Power Output 120line volts) AC DC Undistorted.1.2 1.0 Maximum.2.0 1.7 LoudspeakerElectrodynamic Outside Cone Diameter.5-inch Voice Coil Impedance.3.5 ohms at 400 cycles Field Coil Resistance.450 ohms (cold) COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN
