General-Electric-Co-YRB-60-1 电路原理图.pdf

MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS I 3(1 Symbol Description Symbol Description Symbol Description Cl C2A C2B C3 C4 C5 C6 C7 C8 C9 .05 mfd paper capacitor 40 mfd 150 volt electrolytic capacitor 40 mfd 150 volt electrolytic capacitor .02 mfd paper capacitor 330 mmfd mica capacitor .01 mfd paper capacitor .005 mfd paper capacitor 330 mmfd mica capacitor 47 mmfd mica capacitor Antenna trimmer ClOA ClOB Cll C12 C18 C19 L2 L3 L4 L5 Variable condenser, ant. section Variable condenser, osc. section Oscillator trimmer .05 mfd paper capacitor .05 mfd paper capacitor .005 mfd paper capacitor Ist l.F. transformer 2nd l.F. transformer Oscillator coil Antenna coil Rl R2 R3 R4 R5 R6 R7 R8 R9 Tl 18 ohm H watt carbon resistor 1500 ohm 2 watt carbon resistor 150 ohm H watt carbon resistor 470,000 ohm watt carbon resistor 220,000 ohm M watt carbon resistor 10 megohm M watt carbon resistor Volume control, 0.5 megohm, 2.2 megohm M watt carbon resistor 22,000 ohm 3< watt carbon resistor Output transformer ALIGNMENT PROCEDURE AUeimtNT TRtQUtNatS l.F.455 kc R.F. . 1725 and 1500 kc The location of all trimmers is shown in Fig. 1. and keep the oscillator output as low as a readable meter reading will permit. Apply signal to the converter grid through a .05 mfd capacitor and align progressively the trimmers in the 2nd and 1st l.F. transformer cans. IJ. AUGNMENT Connect an output meter across the voice coil. Turn the volume control to maximum. Set test oscillator to 455 kc R.f. AUGNMENT Apply -the R.F. alignment signals through a standard l.R.E. dummy antenna to the receiver antenna post. With the gang condenser wide open, align the oscillator trimmer (Cll) to 1725 kc. Change the generator signal to 1500 kc, tune the receiver to the signal and peak antenna trimmer (C9) for maximum output. SOCKET INDICATES A C.VOLTS A C. LINE 117 VOLTS NO SIGNAL INPUT AU VOLTAGES MEASURED WITH lOOO OHM/VOLT METER X MEASURED ON 300 V SCALE I2SA7 47 收音机爱 好者资料库 RadioFans.CN