Galvin-Mfg-Co（Motorola）-HS-324 电路原理图.pdf

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1、12BD6 12BE6 12BD6 12AT6 35C5 MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MODEL 62CW1 CHASSIS HS-324 (Continued on next page, at right) * s ! S . i 5 S * Sz mu ii!5 GANG FULLY CLOSED 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA, Inc. ALIGNMENT Model 62CW1, Chas

2、sis HS-324 NOTE: It is recommended that an isolation transformer be 4. Turn the receiver volume control to maximum. NOTE: It is recommended that an isolation transformer be placed between the power line and the receiver to avoid hum and electrical shocks. If an isolation transformer is not available

3、, connect the low side of the signal generator to B- through a * 1 mf capacitor. 1. Connect a low range output meter across the speaker voice coil. 2. Connect the low side of the signal generator to B-. 3. Set the signal generator for 400 cycle, 30% modulation. 5. Use a small fibre screwdriver for a

4、ligning the IF and diode transformers. 6. As stages are brought into alignment, reduce the signal generator output to a level which produces less than .40 volts (. 05 watt) across the voice coil to avoid overloading the receiver, 7. See Figure 4 for adjustment locations and the following chart for p

5、rocedure. GENERATOR STEP ANTENNA CONNECTION GENERATOR FREQUENCY GANG SETTING ADJUST IF ALIGNMENT I. I . I mf RF ALIGNMENT 2. I . 1 mf Grid of conv. (pin 7, 12BE6) Grid of conv. (pin 7, 12BE6) Radiation loop* Radiation loop* Fully 1, 2, 3 & 4 open (IF cores) Fully 5 open (Osc trim) Tune for max Tune

6、for max (RF trim) (Ant trim) Adjust for maximum. Adjust for maximum. Adjust for maximum. Adjust for maximum. *Connect generator output across 5-inch diameter, 5-turn loop and couple inductively to receiver loop. Keep generator loop perpendicular to axis of and at least 12 inches from receiver iron core loop. 收音机爱 好者资料库 RadioFans.CN