Stewart-Warner-Corp-208B 电路原理图.pdf

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1、STEWART-WARNER 208B & 208C CHASSIS MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS CO COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 147 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS SERVICE DATA for 208B & 208C CHASSIS ALIGNMENT EQUIPMENT & PROCEDURE 1. Connect the output meter

2、 across the voice coil or irom the plate oi one 6F6G output tube to chassis through a .1 mid. condenser. 2. Connect the ground lead oi the signal generator to the receiver chassis. 3. Check the pointer to see that it is correctly set to the low ireq. end oi the dial scale with gang in hill mesh. 4.

3、Push in the manual button and keep it pushed in. 5. Turn the volume control to the maximum volume position, and the tone control to the Badio-Speech position. 6. FOLLOW THE ORDER OF ALIGNMENT INDICATED BELOW. Dummy Ant. in Series wilh Sig. Gen. Connection oi Sig. Generator Output to Receiver Signal

4、Generator Frequency Band Switch Position Receiver Dial Setting Trimmer Number Trimmer Description Type oi Adjustment .1 MFD Condenser Lug on Rear Section oi Gang Cond. 455 KC Broadcast Any Point Where It Does Not Aiiect the Signal 1-2 2nd I.F. Adjust ior Maximum Output. Then re peat Adjustment. mm 1

5、st I.F. 400 OHM Carbon Resistor Blue Lead irom Chassis 16 MC Foreign 16 MC 5 Foreign Oscillator Adjust ior Maximum Output. Check to see if Proper Peak was Obained by Tuning in Image at Approx. 15. i MC. If Image does not appear, Realign at 16 MC, with Trimmer Screw farther out. Recheck Image. 400 OH

6、M Carbon Resistor Blue Lead irom Chassis 16 MC Foreign Tune to 16 MC Generator Signal 6 Foreign Antenna Adjust for Maximum Output. Try to Increase Output by Detuning Trimmer and Retuning Receiver Dial until Maximum Output is Obtained. No Connection Place Lead irom Signal Gen. Near Loop 1500 KC Broad

7、cast 1500 KC D Broadcast Oscillator (Shunt) Adjust ior Maximum Output. NOW PLA( :e the chassis and loop antenna into position in the cabinet. No Connection Place Lead irom Signal Gen. Near Loop 1500 KC Broadcast Tune to 1500 KC Generator Signai 8 Broadcast Antenna Adjust ior Maximum Output. No Conne

8、ction Place Lead irom Signal Gen. Near Loop 600 KC Broadcast Tune to 600 KC Generator Signal 9 Broadcast Oscillator (Series) Adjust ior Maximum Output. Try to Increase Output by Detiming Trimmer and Retuning Receiver Dial until Maximum Output is Obtained. MISCELLANEOUS PARTS Part Number Description

9、SOI 182 Cahle motor (with receptacle). 117493 Cablepickup . 114355 Clamp-tor dial cord. 112745 Clipcoil mounting . 117057 Corddrive (specify 6 ft. lengths). SOI 199 Dial Scale . 113402 Drumdial cord drive. 160182 Escutcheondial with glass. 160634 Escutcheonpush button (complete). 88348 Eyeletfor poi

10、nter cord. 160219 Knob . 12349 Nut8-32 for mounting. 116952 Pin for push buttons. 119451 Pointer . 160185 Push button . 81145 Retaining ring for tuning shaft. 113463 Rubber Bushingchassis mounting. 118606 Shaittuning . 112874 ScrewNo. 10 x Hs chassis mounting. 114314 Screwspecial head for mounting e

11、scutcheon. 8S827 Set Screw8-32 Sq. Hd. for drive drum. 119791 Socketoctal . 114378 Socketoctal, with special ground. 114876 Socketoctal (rectifier) . 160294 Socket for 7H7 8 prong. 500051 Socket for loop antenna. B.C.L00P 1500 KC. 148 COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN