RCA-Victor-Co-Inc-8QBK 电路原理图.pdf

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1、PAGE 206-C MODELS 80B and 8QBK Chassis No. RC -336 Eight -Tube, Three -Band, Superheterodyne Receivers Model 8QBK Electrical FREQUENCY RANGES Standard Broadcast (A Band). 530-1,720 kc (566-174 m) Medium Wave (B Band) 2.3-7.0 mc (130.42.8 m) Short Wave (C Band) 7.0-22 mc (42.d-13.6 m) INTERMEDIATE FR

2、EQUENCY 455 kc RADIOTRON COMPLEMENT (1) RCA -6S7 -G R -F Amplifier (2) RCA -6D8 -G 1st -Detector (3) RCA -6J7 Oscillator (4) RCA -6S7 -G 1st I -F Amplifier (5) RCA -6S7 -G 2nd I -F Amplifier (6) RCA -6T7 -G 2nd-Det., A.V.C., and Audio (7) RCA -6L5 -G Driver (8) RCA -6Z7 -G Push -Pull Power Output No

3、te: An RCA -5Y3 -G rectifier is used in the CV -110 A -C power supply unit. POWER -TONE CONTROL 416 RANGE SELECTOR TUN Ng CONTROL Model 8QB SOFTo. VOLUME CONTROL AHPI LOT LIGHT SWITCH Location of Controls The pilot lights arc illuminated by pressing in the volume - control knob. (The pilot lights ar

4、e not controlled by this action when the receiver is operated with the CV -110 a -c power supply unit.) Sensitivity switch is on rear of chassis. Specifications PILOT LAMPS (2) Mazda No. 44, 6.3 volts, 0.25 amp. POWER OUTPUT RATING Maximum 2.8 watts Undistorted 2.0 watts LOUDSPEAKER (Permanent -Magn

5、et Dynamic) Voice -coil impedance at 400 cycles ohms POWER SUPPLY RATING D -C Rating (with vibrator -type power supply unit) - 6.3 volts, 3.5 amps. A -C Rating (with CV -110 A -C power supply unit) - 105.117, 117.130, 140.160, 200-225, 225-250 volts, 25- 60 cycles. 180 170 160 150 140 130 120 110 10

6、0 90 80 70 60 50 40 30 20 10 0 MEXICO CITY - SRELD - BUENOS ACES BERLIN- TOKYO -ITTSGH BERLIN -PITTSBURGH RERUN -LONDON RERUN - NEW YORK LONDON -RAISIN- PHILADELPHIA -ROME LONDON- ROME - ARIS LONDON- SCHENY NEW YORK LONDON -PITTSBURGH HAVANA - SCHENY -MOSCOW 31M MU12EN 25M PRAGUE LIMA 19M PARIS 16M

7、13M C MC 7 8 9 0 14 16 18 20 MC C A 550 500M 600 7o 400 M 800 300M 250M . 1000 1200 200M 1400 1700 A KC B MC 2.5 120 M 3.0 100 M 4.0 75M 5.0 62M COLOMBIA 15. 6.0 I MC B HAVANA 49M KOSION - TORONTO -N. YORK BOGOTA - MEXICO CITY - CINCINNATI -PITTSBURGH BERLIN - PANAMA CITY - CHICAGO - CARACAS 180 170

8、 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Receiver Dial Scales, and Corresbondinn 0-180 Calibration Scales RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A 收音机爱 好者资料库 RadioFans.CN PAGE 207-C SQB, 8QBK Ow I _ N. N 5- 5I F o 4 E WN 1.1 Eu 00 2 o r- .7 E d co N

9、 U3 N C N O K IIN V .f S rn Jnj Jv0 N219 -03J, G Hit ; J 1 Q O Po r09s U d r, 3 on. I0000000000,-Mti W U 0 F F - - . . . . -, 3f119 O v02f Iol3A-3l119 m W N719 7119 o 21L2 nOo ,o u ua- ED E 4 ,71 72 u 收音机爱 好者资料库 RadioFans.CN PACE 208-C 8QB, 8QBK CV -110 A -C Power Supply Unit IZ CHECK PREVAILING LIN

10、E VOLTAGE AND MOVE JUMPER TO CORRESPONDING CONTACT (JUMPER CONTACTS ARE UNDER LID ON Of POWER TRANSFORMER) 210 2 2 -GREEN -JJ ISO V O -RED-YELLOW 110 PRI 125 ) F . BLACK CI W RED BLACK V D( CONNECT HERE FOR 110 V SUPPLY FOR VICTROLA MOTOR %L19 dtlD 0199 01, 3399-, A. C.SUPPLY PLUG D 1 TI GREEN p SV

11、GREEN L_ BROW N WI -VOLTAGE 905n SEC TOTAL BLACK BROWN BROWN 5V3 -G RECTIFIER (BOTTOM VIEW OF SOCKET) BLUE BROWN HEATERS -BLUE BLUE BROWN -BLACK BLACK r-627 _Y L20 t 92J hO11 023 )IDVl9 M0113A A10-032 3018-13A 039 _3n19 bD Zbl 039 o 92 919 Ib SO) 61 - 6 /( OS zmQp z wF 1-a ZW 41- n w2 E is BLACK REA

12、CTOR LI 460. CJ ELECTROLYTIC_ I!MFD I MFD NEG TERMINAL Of ELECTROLYTIC MARKED WITH BLACK DOT FRONT VIEW OF RECEPTACLE POWER RECEPTACLE (WIRING SIDE) M-41,310 CV110 收音机爱 好者资料库 RadioFans.CN PAGE 209-C 8QB, 8QBK Alignment Procedure Connec- Cathode -Ray Alignment is the preferable method. tions for the

13、oscillograph are shown in the chassis drawing. O N O RF Output Meter Alignment.-If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. the TI 2 T 2 AUDIO INPUT P., OUTPUT TRANS. ANT C3 ANT COIL II, ,Cs - , O C30 _ R1 6.IMC Test-Oscillator.-F

14、or all alignment operations, connect low side of the test -oscillator to the receiver ground terminal (G), and keepthe output as low as possible to avoid a -v -c action. DRIVER OUTPUT 5DET 1 0 lb O KC 6000 KC IIIiI R 3 1ST DET O O Calibration Scale on Indicator -Drive -Cord Drum. - The tuning dial i

15、s fastened in the cabinet and cannot be used for reference during alignment; therefore, a calibration scale is It_, C39 c16 3 C33 c43 II 111 J cv Mc COIL Sr1 DET C 3 2 attached to the rear of the drum which is mounted on the front shaft of the gang condenser. The setting of the gang - 2No. 6 16 c c3

16、+ NSP Der.,aF, Avc 2ND I.F. 20 MC, CON (TOR condenser is read on this scale, which is calibrated in degrees. g The correct setting of the gang in degrees, for each align- 3RD IF TRANS 2ND LF TRANS 5T I.F. V. j 15T I.F TR Ns osQo ment frequency, is given in the alignment table. u4 SEC A. 455111 /S L1

17、2 SEC t1DJ 455(9 _ u0 SEC j1DJ455K oai) DRUM PULLEY . - VIC MOLA In ANT. GND. RC 336 8QB TERM. PULLEY / 31260 31606 31260 +/2 3 SENSITIVITY P-84461 SWITCH LINK L sew) rI SPRINGS 13636 PAW ET ) 313W3 Top View, Showing Location of Tubes and Trimmers / START 1 INFTOR RIVE R REAR GROOVEOFDRUM Pointer fo

18、r Calibration Scale.-Improvise a pointer for the calibration scale by fastening a piece of wire to the gang - condenser frame, and bend the wire so that it points to the 180 mark on the calibration scale when the plates are DRUM DRIVE CORD 3n61 fully meshed. IN FRONT GROOVE OF -PULLEY Dial -Indicato

19、r Adjustment.-After fastening the chassis in 31766 the cabinet, attach the dial indicator to the drive cable with TWO-SPE3D787 DRIVE 6 BRACKET indicator at the left-hand end mark on the dial scales and condenser fully meshed. The indicator has a spring DRUM SHOWN WITH GANG ATMAXIMUMCAPAGITV M-417266

20、 RC -366 gang clip for attachment to the cable. Arrangement of Drive Cords for For additional details, refer to booklet RCA Victor Re - Tuning Condenser and Dial ceiver Alignment. Indicator Steps Connect the high side of test -ose, to- Tune test- osc. to- Turn radio dial to- Adjust the following for

21、 max. peak output Leave the sensitivity switch open (minimum sensitivity) during all alignment operations. 6S7 -G 2nd-I.F. grid cap, in series with .01 mfd. L13 and L14 (3rd I -F Trans.) 2455 6S7 -G lst-I.F. grid cap, in series with .01 mfd. kc B band, Quiet point. L11 and L12 (2nd I -F Trans.) 3 6D

22、8 -G 1st-det. grid cap, in series with .01 mfd. L9 and L10 (1st I -F Trans.) Antenna Terminal, in series with 300 ohms 6.1 me 6.1 me (29) B band C33 (osc.)* C8 (ddt)t C30 (ant.) 4A Check to determine that C33 has a weaker signal should be received. been adjusted to correct peak by turning radio to 5

23、.19 me (50), where 5 Antenna Terminal, in series with 300 ohms 20 me 20 me (23.5) C band C31 (osc,)* 5A Check to determine that C31 has been adjusted to correct peak by turning radio to 19.09 me (29.5 ), where a weaker signal should be received. 6 Antenna Terminal, in series with 200 mmf. 1,500 kc 1

24、,500 kc (31) A band C34 (osc.)* 7 Antenna Terminal in series with 200 mmf. 600 kc 600kc(144.5) A band L17 (osc.)tt 8 Repeat Step No. 6. * Use minimum capacity peak (plunger out) if two peaks can he obtained. t Rock the gang condenser slightly while adjusting C8, and use maximum capacity peak if two

25、peaks can be obtained. tt Rock the gang condenser slightly while adjusting L17 for maximum output. NOTE: The oscillator tracks 455 kc above the signal on all bands. PAGE 2i0 -C 8QB, 8QBK I 2 3 STOCK NO 9824 TERM. BOARD SWITCH - p /I REAR OE CHASSIS (REAR VIEW) II HONG POSITION O O SWITCH POSITIONS T

26、APE O O PNONO RADIO SHIELDED CABLE - , -lit- RED SHIELD -BLUE O.pD.T.A SWITCH y TROLL- CO GREEK ELLON ire -n Mill OPEN CRYSTAL OP HIGH LINK pHONO MOTOR _- y 4 IMPEDANCE MAG- LLL AND TURNTABLE NELICETIC PICKUP K-38107 - t 2 3 PTO RECORD PLAYER REARMO FBOARD CHASS SN Record Player Connections, Using a

27、 k Lord Player Connections, Using (t Double -1011, No. 9824 Switch Double -Throw Toggle Switch REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily dentified and may be purchased from authorized dealers. STOCK DESCRIPTION STOCK N DESCRIPTION 13216 12717 31785 31778 12714 1439

28、2 13001 12896 31791 12723 12720 31270 13003 12694 12952 31790 12537 31552 31792 31405 4838 14393 4870 4886 4839 12484 30867 31780 31781 31782 31783 31774 31786 31787 31808 11891 14028 31817 5119 14404 31280 31373 31788 14837 30854 3526 31789 13302 5114 12070 11282 12010 14560 11281 11398 11397 12146

29、 12013 5028 5131 14887 4669 RECEIVER ASSEMBLIES (RC -336) Board -Antenna and ground terminal board. Board -Phonograph input terminal board Cable -Indicator pointer drive cable Capacitor -Comprising one 8 mfd. and one 16 mfd. sections (C-16, C-43) Capacitor -Trimmer, 2-12 mmfd. (C-8, C-30, C-31, C-33

30、, C-34) Capacitor -4.7 mmfd. (C-4) Capacitor -8.2 mmfd. (C-32) Capacitor -15 mmfd. (C-38) Capacitor -16 mmfd. (C-2) Capacitor -56 mmfd. (C-40) Capacitor -100 mmfd. (C-10) Capacitor -100 mmfd. (C-17, C-18) Capacitor -180 mmfd. (C-19) Capacitor -220 mmfd. (C-6) Capacitor -330 mmfd. (C-26) Capacitor -5

31、30 mmfd. (C-36) Capacitor -560 mmfd. (C-5, C-7) Capacitor -680 mmfd. (C-11, C-12, C-14, C-15) Capacitor -4,000 mmfd. (C-35) Capacitor -6,000 mmfd. (C-37) Capacitor -.005 mfd. (C-29, C-41, C-42) Capacitor -.01 mfd. (C-13, C-20, C-28) Capacitor -.025 mfd. (C-24) Capacitor -.05 mfd. (C-1, C-21, C-45) C

32、apacitor -0.1 mfd. (C-22, C-23) Capacitor -0.25 mfd. (C-25, C-27, C-44) Capacitor -0.5 mfd. (C-46) Coil -Antenna coil and shield (L-1, L-2, L-3, L-4) Coil-R.F. coil and shield (L-5, L-6, L-7, L-8) Coil -Oscillator coil -A band only (L-17) Coil -Oscillator coil -B and C bands only (L-15, L-18) Conden

33、ser -3 -gang variable tuning condenserpa (C-3, C-9, C-39) Cord -Variable condenser drive cord Drive -Two speed drive and bracket Drum -Variable condenser drive cord drum with calibrator scale Lamp -Dial lamp Nut -Jamb nut for capacitor, Stock 12714 Plate -Cushion socket mounting plate -less socket P

34、lug -3 -contact female plug for speaker cable Plug -7 -contact plug for power input Pulley -Indicator drive cord pulley (large). Pulley -Indicator drive cord pulley (small) Pulley -Variable condenser drive cord pulley - fastens on two speed drive Resistor -1,000 ohms, 1/10 watt (R-5) Resistor -1,500

35、 ohms, e watt (R-8) Resistor -2,200 ohms, e watt (R-19) Resistor -5,600 ohms, 1/10 watt (R-22) Resistor -10,000 ohms, 1/10 watt (R-2) Resistor -15,000 ohms, 1 watt (R-7) Resistor -18,000 ohms, 1/10 watt (R-12) Resistor -56,000 Aims, 1/10 watt (R-4) Resistor -88,000 ohms, 1/10 watt (R-15) Resistor -1

36、00,000 ohms, e watt (R-9. R-18) Resistor -100,000 ohms, 1/10 watt (R-18). Resistor -220,000 ohms, 1/10 watt (R-10) Resistor -560,000 ohms, 1/10 watt (R-21) Resistor -820,000 ohms, 1/10 watt (R-13) Resistor -1 meg., 1/10 watt (R-1, R-3, R-20) Resistor -1.8 meg., watt (R-14) Resistor -2.2 meg., 1/10 w

37、att (R-8) Retainer -Retainer for pulley, Stock 31280 and 31373 Screw -No. 8-32 sq. head set screw for drum, Stock 14856, and pulley, Stock 31788 3950 31365 31251 13638 31775 30953 31777 31784 31268 31779 31776 12720 31796 12484 13046 14289 12819 31794 5140 14409 12262 4786 31793 31795 3201332015 144

38、09 32014 30880 31251 31998 31310 5118 31797 31275 5118 31798 31800 31799 31801 31802 31803 31287 31306 12993 14270 31558 Shield -Tube shield Socket -Dial lamp socket Socket -Octal base tube socket Spring -Indicator drive cable, or variable con - denser drive cord tension spring Switch -Range switch

39、(S-1, S-2, S-3) . , Switch-S.P.S.T. sensitivity switch (S-6) Tone Control and power switch (R-17, S-4) Transformer -Driver a n d output transformer (T-1, T-2) Transformer -T h i r d I.F. transformer (L-13, L-14, C-17, C-18) Transformer -First or s. cond I.F. transformer (L-9, L-10, C-11, C-12) (L-11

40、, L-12, C-14, C-15) Volume Control and dial light switch (R-11, S-5) VIBRATOR POWER SUPPLY UNIT Capacitor -100 mmfd. (C-2) Capacitor -.02 mfd. (C-4, C-5) Capacitor -0.25 mfd. (C-1, C-3, C-7) Capacitor -8 mfd. (C-6) Clip -Battery clips -one marked + and one unmarked Coil -Choke coil (L-4) Coil -Choke

41、 coil (L-1, L-3) Fuse -5 -amp. Plug -7 -contact female plug for power cable Resistor -680 ohms, watt (R-1, R-2) Socket -Vibrator socket Transformer -Vibrator power transformer (T-1). Vibrator -Plug-in vibrator (L-5) CV -110 A -C POWER SUPPLY UNIT mfd. (C-2) Capacitor -Comprising citor-Comprising 2 s

42、ections 16 mfd. each (C-1, C-3) Plug -7 -contact plug for power output cable Reactor -Filter reactor (L-1) Resistor -150 ohms, 4 watt (R-1) Socket -Rectifier tube socket Transformer -Power transformer 105-130, 140- 160, 200-250 volts, 25-60 cycles (T-1) SPEAKER ASSEMBLIES Model 8QB (Speaker RL -73-4

43、) Cone -Speaker cone and voice coil (L-18) Plug -3 -contact male plug for speaker Speaker complete Model 8QBK (Speaker RL -71-5) Cone -Speaker cone and voice coil (L-18) Plug -3 -contact male plug for speaker Speaker complete MISCELLANEOUS ASSEMBLIES Dial -Station selector dial scale and crystal Esc

44、utcheon -Dial escutcheon -less dial scale and crystal Indicator -S t a t i o n selector indicator pointer complete with carriage and clip Knob -Station selector, range switch or tone control knob Knob -Volume control knob Rod -Indicator pointer slide rod Screen -Dial color screen and light diffuser Screw -No. 8-32 x e -in. headless set screw for knob, Stock 31803 Spring -Retaining spring for knob, Stock 31802 Stop -Indicator carriage spring stop