Philco-Radio-and-Television-Corp-41-316 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN MANUAL OF 1941 MOST POPULAR SERVICE DIAGRAMS Opera- SIGNAL GENERATOR RECEIVER SPECIAL lions in Order Output Connections to Receiver Dial Setting Dial Setting Control Settings Adjust Compen sators in Order INSTRUCTIONS 1 High side to No. 3 terminal loop Panel. 455 K. C. 580 K.

2、 C. Vol. Max. Range Switch S. W.” Position 48D, 43A, 43B, 42A, 42B 2 Use Loop on Generator 1500 K. C. 1500 K. C. Vol. Max. Range Switch Broadcast 21, 10A Note A 3 Use Loop on Generator 580 K. C. 580 K. C. Vol. Max. Range Switch Broadcast 21A Roll Tuning Con Note B 4 Use Loop on Generator Repeat oper

3、ation No. 2 again 5 Use Loop on Generator 6 M. C. 6 M. C. Range Switch “Police* 18B Note C 6 Use Loop on Generator 12 M. C. 12 M. C. Range Switch “S. W.* 1 18A, 4A Note D 7 - Use Loop on Generator 18 M. C. 18 M. C. Range Switch “S. W-” 2 18, 4 Note E Note ADIAL CALIBRATION: In order to adjust the re

4、ceiver correctly, the dial must be aligned to track properly with the tuning condenser. To adjust the dial, proceed as follows: With the tuning conden ser closed (maximum capacity), set the dial pointer on the extreme left index line at the low frequency end of the broadcast scale. The arrangement o

5、f the drive cable in this position is shown in Fig. 6. NOTE B When adjusting the compensator, the receiver Tuning Condenser must be adjusted (rolled) as follows: First tune the compensator for maximum output, then vary the tuning condenser of the receiver for maximum output. Now turn the compensator

6、 slightly to the right or left and again vary the receiver tuning condenser for maximum output. This procedure of first setting the compensator and then varying the tuning condenser is continued until maximum output reading is obtained. NOTE C Adjust compensator (18B) to the SECOND signal peak from

7、the tight (closed) position. NOTE D Adjust compensator (18A) to the FIRST signal peak from the tight (closed) position. If the compensator is correctly adjusted the image signal will be weakly heard by leaving the receiver dial at 12 M. C. and turn the signal generator to 11.090 M. C. NOTE E Adjust

8、compensator (18) to the SECOND signal peak from the tight (closed) position. If the compensator is correctly adjusted the image signal will be weakly heard by leaving the receiver at 18 M. C. and turning the signal generator to 18.910 M. C. When adjusting compensator (4) roll the tuning condenser, See Note “B* on how to roll the condenser. 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN