Gamble-Skogmo-Inc-RA37-43-9855 电路原理图.pdf

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1、MANUAL OF I9S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS Western Auto Supply Company MODEL D3351-RED; D3352-GRAY; D3353-GREEN W5 2nd DTT.IV.C. A.F. VOLTAGE MEASUREMENTS All voltages measured to B using a 20,000 ohm per volt meter with the receiver connected to a 117 volt 60 cycle power supply, except those m

2、arked with an asterisk ( ) The asterisk indicates thot the voltoge was measured with the receiver powered by its self contained batteries. Loop terminals shorted together. No voltage reading ot a tube element indicotes zero voltage or voltage which cannot be accurately measured with a 20,000 ohm per

3、 volt meter. ALIGNMENT PROCEDURE SIGNAL GENERATOR CONNECTIONS _ - SIGNAL CONNECT HIGH CONNECT GROUND SIDE OF SIGNAL LEAD OF SIGNAL FREQUENCY GENERATOR TO GENERATOR TO RECEIVER DIAL SETTING TRIMMER OR SLUG NUMBER TRIMMER DESCRIPTION TYPE OF ADJUSTMENT 455 KC Any point where it does not affect the sig

4、nal. CAUTION If your sig- Lug on trimmer #6 noj g#nerotor js de al gang (see , w|th on AC.DC chart below for loca- power suppiyr tion of trimmer). connect ground lead of signal generotor to re ceiver through a .25 Mfd. condenser. IMPORTANT: Before undertaking alignment of the oscillator and an tenna

5、 trimmers it is necessary ta reassemble the chassis in the cabinet. The tuning knob should be installed an the gang condenser shaft sa thot when the condenser is fully meshed, the dot under the smaller 5 of the 55 on dial scale is directly opposite the pointer (gold mark an cabinet). As battery posi

6、tion slightly effects R.F. alignment, it is prefer 1 and 2 3 and 4 Adjust for maximum output. Then repeat adjustment. able to hav. batteries in prop.r place. To gain access ta oscillator and antenna trimmers, it will be necessary to open back of cabinet. In order ta provide a coupling for the signal

7、 generator, during this part of the procedure, wind several turns of wire in a circular shape to form a radi ating loop that may be placed adjacent (axes parallel) to the loop antenna. Now complete the alignment procedure as follows. Connect directly to radiating loop. (See above for instructions on radiating loop.) Rotate and adjust loop for moximum input. 1600 KC Tune to 1500 1500 KC Kc. generator signal. Broadcast Oscillator Broadcast Antenna Adjust for maximum output. Adjust for maximum output. 收音机爱 好者资料库 RadioFans.CN