Sparks-Withington-Co-8W10 电路原理图.pdf

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1、liili 1951 MOST-OFTEN-NEEDED RADIO DIAGRAMS ifflf SPARTON SUPERHETERODYNE CHASSIS TYPE 8MI0 I- - i MnniTT3 141 X, I 4 2X _ U fi -1 MODELS |Q40X, 10 4 I X Sparton Chassis 8W10, used in Models 141XX, 142XX, 1040XX, 1041XX, 1085, 1086, 1090, and 1091, electrically is almost identical to the chassis des

2、cribed on this page and on the next page (over). T-3 h* d I PRI. A W0S|“A.V.C. PRI. 1 n $*. 1 3* 3* Sr*+_ FXj-GRID I.F. PLATE rA -F.M, GRID T-2 T-4 A.M. “-A.V.C. B+- “Ha - DIODE R ETU R N PRI. PRI. SLUG FX- - SLUG _2. -A.M. DIODE BOTTOM VIEW, TERMINAL HOOKUP FOR T- I, T- 2 ,T-3 ,T-4 8. T-5 SPECIAL N

3、OTE: THESE TRANSFORMERS SUPPLIED IN COMPLETE ASSEMBLIES *-* REPLACE ONLY WITH TEMPERATURE COEFFICIENT AS INDICATED. PHONO 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1951 MOST-OFTEN-NEEDED RADIO DIAGRAMS SPARTON SUPERHETERODYNE RADIO RECEIVER CHASSIS TYPE 8MI0 MODELS oi0Xfo X OPER ATION ALIGNMENT OF GENERATOR

4、 CONNECTED TO DUMMY ANT. BAND SWITCH SETTING TUNING COND SETTING TRIMMER OR SLUG REMARKS 1. Set Dial pointer even with left-hand stop line with condenser gang closed. 2. Connect output meter across speaker terminals. 3- A.M.-I.F. Pin #7 of 6BE6 Conv. Tube .02 MFD Cond. 456 KC. A.M. Open T4 Sec. Slug

5、 Max. Reading T4 Pri. Slug Max. Reading T2 Sec.Slug Max. Reading T2 Pri. Slug Max. Reading Mm Repeat operation #3. 5- A.M.-R.F. A.M. Ant. On Cabinet * 1500 KC. A.M. 1500 KC. 1500 KC. C2B Osc. Tri. Peak Accurately 1500 KC. C17 Ant.Tri. wm A.M.-R.F. On Cabinet * 600 KC. A.M. 600 KC. L-2 Slug Max.Readi

6、ng 8. Repeat operations #5,#6 and #7. 9. Check Calibrations at 600,1000 and 1500 KC. 10. SPECIAL NOTE: For complete F.M.- I.F. Visual Alignment instructions please refer to pages 9.10.11.12.13 and 14 of Bulletin 11,Manual 6. 11. F.M.-I.F. Alignment using an A.M. Generator and Output Meter. 12. T5 F.

7、M. Ratio Det. Pin #1 of 2nd 6BA6 Tube .02 MFD. Cond. 10.7 MC. F.M. Open T5 Sec. Slug Max.Reading T5 Pri. Slug Max.Reading 13- NOTE: Operations 11,12,14.15,18 and 19 must be made with generator output as low as possible,consistent with usable output meter reading. 14. T3 2nd. F.M.-I.F. Pin fl 1st 6BA

8、6 Tube .02 MFD. COND. 10.7 MC. F.M. Open T3 Sec. Slug Max.Reading T3 Pri. Slug Max.Reading 15. T1 1st F.M.-I.F. Pin & on 12AT7 Mixer .02 MFD. COND. 10.7 MC. F.M. Open T1 Sec. Slug Max.Reading T1 Pri. Slug Max.Reading 16. Adjust secondary slug on T5 ratio detector transformer to minimum deflection or

9、 dip on output meter. Under certain conditions it is possible to adjust T5 sec.slug to minimum noise with the receiver tuned to a weak station. This operation is very critical and the receiver must be tuned to the center response only. 17- F.M-R.F. alignment using an A.M. Generator with frequencies

10、of 88 to 108 MC.and a vacuum tube voltmeter.or D. C. voltmeter. (20,000 Ohms per volt). 18. Place meter across C36 elect, condenser. (Meter reading approximately 1 volt) 19- J.M.-R.F. t- m Match Gen. F.M. Ant. Tq 300 0hms 106 MC F.M. 106 MC. C2A Osc. Tri. Max.Reading C2C Ant. Tri. 20. Check Calibratiwi at 88 MC. | 收音机爱 好者资料库 RadioFans.CN