Packard-Bell-Co-6RT2 电路原理图.pdf

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1、VOLUME R-19, MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION PACKARD BELL MODEL 6RT2 PERSONAL TRANSISTOR RADIO M 14,2*/: Drf$T.* !-T- kJ+ -* C/a C-4 B A/OTA t f.-4/i s/sro adjust 1-2, 1-3, A 1-4 from rear. /TAf r#x#s-/srojQe & A V 7- u r o/ *./0 xl*40. 2/S63 2 A/40 6 K4f 4U4/0 oar: * 2A/G3S 2A/4o

2、* xe 2erc ro a ZA O ZJT /2$S Step 1. Preset l-F amplifier neutralizer capacitor C-7 by turning completely clockwise (maximum * ArrcHZ pa/p p samc a a/a/ gpo/aP a/o capacity) then back one eighth of a turn (45 degrees). See note after step seven. Step Connect Test Oscillator To Test Oscillator Freque

3、ncy Radio Dial Setting Adjust 2. Variable, antenna section 455 kc 535 kc L-3 & L-4 for MAX 3. Couple to antenna 600 kc 600 kc L-2 (osc) for MAX 4. Couple to antenna 1620 kc 1620 kc C-4B for MAX 5. Repeat steps two and three and check calibration at low end of dial (535 kc) 6. Couple to antenna 1500

4、kc Tune to test osc. signal C-1B for MAX 7. Couple to antenna 600 kc 600 kc L-l (antenna) for MAX NOTE: Optimum setting of neutralizing capacitor C-7 depends upon parameters X-2 and L-4. If, after align ment, regeneration occurs on stations near the high end of the dial, capacity of C-7 should be decreased (ccw). Too low a value, however, will result in loss of sensitivity. If it has been necessary to change the setting of C-7 more than 45 degrees after completing the align ment, then the l-F adjustment (step two) should be repeated. _ 100 收音机爱 好者资料库 RadioFans.CN