RCA-Victor-Co-Inc-6Q8 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS Steps Connect the high side of the test-osc. to Tone test- osc. to TumratUo dial to Adjust the following for max. peak oatput 1 eK71-F grid cap in aeries with .01 mfd. 466 kc “A” Band Quiet Point L12 and L13 (2ad I-F Trans.) 2 6S A7 det. grid in series wi

2、th .01 mfd. 466 kc between 660-760 kc LIO and Lll (1 I-F Trans.) 3 Ant terminal in series with 200mmf. 1.600 kc 1,600 kc (182.4) “A” Band C6(osc.) C2 (ant) 4 Ant terminal in series with 200mmf. 600 kc 600 kc (38) “A” Band 1.8 (osc.) Rock Gang 6 Repeat steps 3 and 4 . . 3 Ant terminal in series with

3、200mmf. 380 kc 360 kc (160.6) “X”Band C8 (osc.) C26 (ant) 7 Ant terminal in aeries Wftb200mmf. 176 kc 176 kc (63J) “X-Band L8 (osc.) Rock Gang 8 Repeat stepe 6 and 7 Ant terminal in series with 300 ohms lA2mc 16iSmc (147.2) “C”Band C6 (osc.)* C27 (ant) 10 Ant terminal in series widi200mmf. 360 kc 36

4、0 kc (16LB) “X”Band C8 (osc.) 11 Ant terminal in aeries with 900 mmf. 1.600 kc 1.600 kc (1624) “A” Band C6(osc.) Ue minimum capacity peak if wo be obtain. lAecJc to oweraunei receiver to approximately 14.29 me where a weaker ngnal Aould be received. / L/* 收音机爱 好者资料库 RadioFans.CN 76 C MODELS 5QI 2, 5

5、QI2A, 6Q8 AND 6QK8 Five -Tube, RC -396 D RC -396E RC -414B Three -Band, AC, Superheterodyne Receiver REFER TO MODEL 5Q8 FOR ALIGNMENT PROCEDURE MODEL 5Q12 Electrical Specifications MODEL 6Q8 FREQUENCY RANGES Long Wave (X) Medium Wave (A) Short Wave (C) INTERMEDIATE FREQUENCY TUBE COMPLEMENT (1) RCA-

6、6SA7 (2) RCA -6K7 (3) RCA-6SQ7. 2nd PILOT LAMP POWER OUTPUT RATING (105-125 Volt Operation) Undistorted Maximum RC -414B 145-405 kc (2,069-740 m) 540-1,720 kc (555-174 m) 5.8-18 mc (51.7-16.6 m) 455 kc Detector -Oscillator I -F Amplifier Detector, A.V.C., and A -F Amplifier Mazda No. 44, 6.3 volts,

7、0.25 amp. 1.5 watts 3.3 watts POWER SUPPLY RATINGS Rating A 105-125 volts, 50-60 cycles Rating B 105-125 volts, 25 cycles, 75 watts Rating C 105-125; 200-250 volts, 50-60 cycles, 75 watts TUNING INDICATOR -i-N 6U5/6G5 2 VC AND A.F. 26487 L9 -O5C. L 13 -SEC. ADJ. 175KC 455 KC C2 1500 KC I5.1 DE T. 44

8、1 5118 32933 32905 32838 32937 33029 32935 32936 4982 14270 30330 SPEAKER ASSEMBLIES (R L-79-2 ) Cap-Speaker cone center dust cap Coil-Speaker field coil (L14) Coil-Speaker hum neutralizing coil (L15) Cone-Speaker cone and voice coil. Plug -3 -prong male for speaker Speaker complete Transformer-Outp

9、ut transformer (T2) MISCELLANEOUS ASSEMBLIES Dial-Dial scale and crystal Knob-Range switch knob (small) Knob-Tone control and switch knob (small) . Knob-Tuning knob (large) Knob-Volume control knob (large) Spring-Retaining spring for knob Stk. 32935 Spring-Retaining spring for knob Stk. Nos 32938 or

10、 32937 Spring-Retaining spring for knob Stk. 33029 MODEL 6QK8, RC -414B Technical Information and Service Data: Refer to Service Data on Model 6Q8 and the following parts: Stock No. SPEAKER ASSEMBLY, 6QK8 (RL -70J-6) 31825 Cap-Cone center dust cap 11234 Coil-Speaker field coil :11275 Cone-Speaker co

11、ne and voice cod 5118 Plug -3 -prong male plug for speaker. 14355 Transformer-Output transformer MISCELLANEOUS ASSEMBLIES :1:3149 3 Dial-Glass dial scale, 6QK8 MODEL 5Q12 (RC9960) Replacement parts as for 6Q8 with the following cep tions. 34248 34247 32818 32635 32820 34249 34221 32847 32344 32342 3

12、23 26 4393 32846 14270 RECEIVER ASSEMBLIES Add Stock No. er Bracket - Drive bracket, pulleys and tuning knob shaft Control - Tone control Control - Volume control and power switch Cord - Indicator drive cord Switch - Range switch MISCELLANEOUS ASSEMBLIES Ili al - Glass dial scale Frane - Dial frame

13、less shaft, pointer and dial sc al e Indicator -Station selector pointer and car- riage Knob - Black range switch knob Knob - Black volume control knob Knob - Brown tone control or tuning knob Screw - 18-32 headless set screw for knobs Stk. #32344 and ig23 Shaft - Pointer carriage guide shaft Spring

14、 - Retaining spring for knobs Stock No. 32338, 3?953 32251, 12013 1434.4 329313 32950. 32930, 32310. 32911 and 32928 not used with Model 5Q12 - MODEL 5Q12A (RC996E) Replacement parts as for 648 with the following ex- ceptions. 32332 12622 33 904 34146 3228 18 32635 3054E 32333 323223 32907 32903 329

15、06 32904 5118 32902 32905 322838 34221 32343 33)85 32341 32339 33087 33)91 33086 33563 33)93 33562 32347 32346 14270 RECEIVER ASSEMBLI ES Add Stock No. Bracket - Drive bracket, pulleys and tuning knob shaft Capacitor - 5g mmfd. Capacitor - 100 mmfd. Control - Tone Control Control - Volume Control an

16、d power switch Cord - Indicator drive cord Resistor - 470 ohms, 1/4 watt (R0) Shaft - Tuning knob shaft eyelet and re- tainer Switch - Range switch SPEAKER ASSEMBLIES (RL -78-2) Cap-Cone cer.ter dust cap Coil-Speaker field coil (L12) Coil-Speaker hum neutralizing coil (L13) Cone-Speaker cone, voice

17、coil, center suspen- sion, and dust cap (L14) Plug -3 -contact male for speaker Speaker-Complete Transformer-Output transformer (T2) MISCELLANEOUS ASSEMBLIES Dial - Glass dial scale Fraie - Dial frame complete with plate and brackets less dial, pointer and guides Knob - Black range switch knob Knob

18、- Black tuning or tone control knob Knob - Black volume control knob Knob - Brown tuning or tone control knob Knob - Ivory range switch knob Knob - Ivory tuning or tone control knob Knob - Ivory volume control knob Knob - Maroon range switch knob Knob - Maroon tuning or tone control Knob - Maroon volume control knob Pointer - Station selector pointer and car range Shaft - Pointer carriage guide shaft Spring - Retaining spring for knobs Stock No- 30949, 32823, 38953, 32961. &68 , 1s)13 14343 32932, 32950, 32933, 32911 and 32023 ! t RsAd with 54124