RCA-Victor-Co-Inc-QB3 电路原理图.pdf

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1、PAGE 34-C FREQUENCY RANGES Standard Broadcast (A Band). 540.1,720 kc (556.174 m) Medium Wave (B Band) 3 0.9.5 me (100-31.6 m) 31 Meter Spread Band 9 5.11.7 me (31.6-25.6 m) 25 Meter Spread Band 11.7.15.1 me (25.6-19.9 m) 19.13 Meter Spread Band 15.1-22.5 me (19.9.13.3 m) INTERMEDIATE FREQUENCY 455 k

2、c TUBE COMPLEMENT (1) RCA -6S7 R -F Amplifier (2) RCA-6SA7 1st Detector-Oscillator (3) RCA -6S7 I -F Amplifier (4) RCA -6T7 -G 2nd Det. A -F Amplifier A.V.C. (5) RCA -6W7 -G Driver (6) RCA -6Z7 -G Power Output (7) RCA -6N5 Tuning Indicator Note.-An RCA -5Y3 -G rectifier is used in the CV -110 A -C p

3、ower supply unit. Dial Lamps (2) Mazda No. 47, 6.3 volts, 0.15 amp. CV -110 MI -8122 POWER OUTPUT Unit Unit Undistorted 1.3 watts 2 0 watts Maximum . 1.9 watts 2.6 watts FOR AC OPERATION REPLACE WITH POWER UNIT CV -110 ANTENNA -GROUND TERMINAL BOARD AG 00 SEVEN PRONG PLUG 41 LINK 123 VIBRATOR UNIT P

4、HONO BOARD FUSE. BATTERY LEADS Back View BLACK RED 1 5. O RED 3 - BLK-REDTR. O -BLK- YELLOW - SPEAKER PLUG CABLE SOCKET r- BLACK -RED DOT TO OUTPUT PLATE NQ.2 TO DRIVER CATHODE K. GROUND RED-BUS.B+ BLACK- - TO OUTPUT PLATE N1. BROWN BMW -BL Connections and Colors of Loudspeaker and Cable MODEL 0B3 a

5、nd Power Units CV -110 and MI -8122 Chassis No. RC -539D Six -Tube and Magic Eye, Five -Band, Superheterodyne Receiver Electrical and Mechanical Specifications LOUDSPEAKER (RL.90-5) Type 8 -inch Permanent -Magnet Dynamic V. C. Impedance 2.6 ohms at 400 cycles POWER SUPPLY RATING D -C Rating (with vi

6、brator -type power unit MI.8122)- 6.3 volts, 3.2 amps. A -C Rating (with CV -110 A -C power supply unit) - 105.117, 117.130, 140-160, 200.225 volts, 25.60 cycles Height Width Depth CABINET DIMENSIONS (inches) 135/8 . 211/2 . 107/r, Chassis -Base Dimensions (inches) . 27/8 . 155/8 . 61/2 Over-all Cha

7、ssis Height (inches) 81/4 Net Weight 40 lbs. Tuning Drive Ratio 28 to 1 MAGIC CYC wLUMC a DIAL LIGHT CONTROL (PUSH KHOO TO LIGHT DIAL) Controls Record Player Attachment.-Terminals are provided on the rear of the chassis for convenient connection to a record player such as the RCA R -103-S. A Stock N

8、o. 9824A switch may be used to change from radio to record player. The con- nections of this switch are shown. In the event that a No. 9824A switch is not available, a double -pole double -throw toggle switch may be used. OPEN LINK BROWN BLACK -TERM. BOARD REAR OF CHASSIS SHIELD CABLE FROM 9824A SWI

9、TCH Record Player Connections, Using Stock No. 9824A Switch Controls RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N ) , U S A 收音机爱 好者资料库 RadioFans.CN Vv g II I( -ih e : F Q m2 O t+1 + HIE Hi 1k N U o ap01 Ns* Ti 04 44) o 0 o _x o ( -1 E pE O I .% 35-C QB-3 收音机爱 好者资料库 RadioFans.CN PAGE

10、 36-C QB-3 e 2 e dg O V RED BLACK O CONNECT MERE FOR IIO V SUPPLY FOR VICTROLA MOTOR CHECK PREVAILING LINE VOLTAGE AND MOVE JUMPER TO CORRESPONDING CONTACT (JUMPER CONTACTS ARE UNDER LID ON TOP OF POWER TRANSFORMER) TI 210 2AOI -GREEN 150 CREOYELLO 4 0 1! BLACK YELLOW 702E TOTAL A. C.SUPPLY PLUG CRE

11、E GREEN Ii:G: SEC. TOTAL 905n BLACK BROWN BROWN L_ REACTOR LI 460n 5Y3 -G RECTIFIER (BOTTOM VIEW OF SOCKET) TEL. TEL FD j.,ELECTROLYTIC+ IOMFD 10 MFD HEG. TERMINAL OF ELECTROLYTIC MARKED WITH BLACK DOT MEAT ERS BLUE BROWN BLUE BROWN - BLACK BLACK BLACK The pilot lights are illuminated by pressing in

12、 the volume - control knob. (The pilot lights are not controlled by this action when the receiver is operated with the CV -110 A -C power supply unit.) PUL LEY DRUM DRUM DRIVE CORD INDICATOR DRIVE CORD ) 2.1 TURNS Condenser and Indicator Drive Cords PULLEY Alignment Procedure Cathode -Ray Alignment

13、is the preferable method. Con- nections for the oscillograph are shown in the chassis drawing. Output Meter Alignment.-If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. Test-Oscillator.-For all alignment operations, connect the low side

14、 of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. Calibration Scale on Indicator -Drive -Cord Drum.- As the first step in r -f alignment, check the position of the drum. The 0 mark on the drum scale must be vertical, and directly over t

15、he center of the gang -condenser shaft when the plates are fully meshed. The drum is held to the shaft by means of two set screws, which must be tightened securely when the drum is in the correct position. Pointer for Calibration Scale.-Improvise a pointer for the calibration scale by fastening a pi

16、ece of wire to the gang - condenser frame, and bend the wire so that it points to the 0 mark on the calibration scale when the plates are fully meshed. Spread -Band Alignment.-The most satisfactory method of aligning or checking the spread -band .ranges is on actual reception of short-wave stations

17、of known frequency, by ad- justing the magnetite -core oscillator coil for each band so that these stations come in at the correct points on the dial. When a test oscillator is employed for spread -band align- ment, a final check should be made on actual reception of short-wave stations of known fre

18、quency, apd the magnetite - core oscillator coil for each_band should be re -adjusted so that the stations come in at the correct points on the dial. For additional information, refer to booklet RCA Victor Receiver Alignment. 150 YELLS J FRONT VIEW OF CONNECTOR PO CO OROR (WIRING SIDE) M-417710 CV11

19、0 A7n TOTAL L2 L3 .02 n .02 n CIi 1C2 T CJ .25 MF1 ITOOMMf I.20MFp 2PJWER .1111., (WIRING SIDE) Rp BLACK o 10n L 4 RED -/-/V V V - C7 C0 xSMFD TBMFp CV -110 A -C lowver Supply Unit FE 111-8122 Vibrator Type Power Sup. ply Unit l t BLUE VIBRATOR M- 01057-B BOTTOM VIEW OF SOCKET MI -012I M-41TJOx FRON

20、T VIEW OF POWER CONNECTOR C3 -ANT. - 1500K0 C4 -ANT. 9.5MC 72. L3 L2, L3 o o 19-13M -,-. C1 -ANT. MC. LI (TO ANT.) n 51 -FRONT. LI L2 SI -REAR osc COILS 25M 52 -FRONT L14 52 -REAR L13 SET. COILS L19 53 -FRONT SR 53 -REAR LIS L13 19-13 25M L9 TAP LIS, LI7 L8 L9 31M o L9 L8 L8 TAP L14 LIS L18 119 TAP

21、Coil and Trimmer Locations (Bottom View) 6S7 C23/-DET. /y 11.8MC. CIB-SET 9.SMC. C12 -05C fe.1001(C C24-DET. C t. 1) -B IOX L10 -05C L11 -05C (Q C9 -05C. O) t7i C17 9.5MC 6OOKC 95MC 111MC C 2s L2 L6 A -B 31M ANT COIL LT L4 C45 Coo L20 -L21 o 455KC Iy7. I. F. TRANS 2001 F TRANS L22 L23 455 KC 637 6T7

22、 0 0 O 0 0 C 26-O5C: 15.2MC. Tube and Trimmer Locations (Top 1ie74:9 收音机爱 好者资料库 RadioFans.CN PAGE 37-C Alignment Procedure QB-3 Steps Connect the high side of the test-osc. to- Tune test- osc. to- Range Switch Turn Radio Dial to- Adjust the following for max. peak output 6S7 I -F grid in series with

23、 .01.mfd. 455 kc A band Quiet point 600 kc end of dial L 23-L22 2nd I -F transformer 2 6SA7 1st det. grid in series with .01 mfd. L21 -L20 1st I -F transformer 3 Antenna terminal in series with 300 ohms 11.8 me 25 meter band 11.8 me (41.5) L11 (osc.) Cl (ant.) C23 (det.) 4 15.2 me 15.2 me (161.7) C2

24、6 (osc.)*t 5 Repeat steps 3 and 4 until aligned. 6 Antenna terminal in series with 300 ohms 15.2 me 19-13 meter band 16.2 me (24) L12 (osc.)* 7 8.b me 31 meter band 9.5 me (23.8) L10 (osc.)* C4 (ant.) C18 (det.)* 8 9.5 me B band 9.5 me (168.5) C9 (osc.)* 9 Antenna terminal in series with 200 mmfd. 5

25、00 kc A band 1,500 kc (153) C12 (osc.) C3 (ant.) C24 (det. 10 600 kc 600 kc (30.5) L8 (osc.) Rock in 11 Repeat steps 9 and 10. * Use * Peak * Use t Check where a weaker NOTE: 31 minimum capacity peak if two can be obtained. at minimum plunger position if two peaks can be obtained. maximum capacity p

26、eak if two peaks can be obtained. image to determine that C26 has been adjusted to correct peak by tuning receiver to approximately 14.29 signal should be received. Oscillator tracks above signals on all bands. 0 10 20 30 0 50 60 170 180 1111111111111111111 iIlllll Milli 111141111111111 111111111111

27、1111FI111011111111111111111 11111111 111111111111111IIIIIIl111111111111111111111111111111111101111111 110I1111111111111111 me PICCO CITY 0 CO TOKYO 01.0N00N 101d110 014010 cede 9.8 00.0 00.6 00.3 02.4 me 31 WIC 1016 0 PARIS 0 0000 ICNRMONO1 0 01110 3.0 3.3 3.3 4.5_M 5.5 =M 6.6 1.9 8 9.5 nK B 25 MAW

28、CITY o 0 1010011 o Cu YORK 101100 PARIS O00ROSTO000PITii1YRtN 02.0 12.6 03.2 04.2 NUIMN 0 0 00M 0 ROOt 05.8 me 25 550 600 100 800 1200 1400 A 1100 kc A 09-03 .1000 000 C7 0 04100 0 td YORK 7 01011111 i0im 7. 00s100 15.6 06.0 08.0 . 0 MOOR 19. 100000 0 o nntsuseN o RIO O 1 . . . . . . OR OPUIS - 17 M

29、ETERS 16 M =PARIS s N ilt0 MC a9-03 o ROue 13 METERS 150 II 160 II 170 180 Scales scale can be point on approximately 1111rlrrrr1111r11 ipirr111rrlrrlrp11111IIIIIIIr111rrIIuipiIrI1111ilwirrlllrllrlimilIIrIIl11II11rt ruillllllIupilllrrrrlrrlllllrllllr111rl1jllrrrrlrll1rr1111111rrrl 0 10 20 30 40 50 6

30、0 70 80 90 100 110 120 130 140 Calibration Scale Reduced Reproduction of Receiver Dial and Corresponding 0-180 Calibration The corresponding position of the dial indicator for any setting of the calibration determined by drawing a line from this point on the bottom calibration scale to the same the

31、top calibration scale. For example: 30 ou the calibration scale corresponds to 800 kc on A band, etc. Read instructions under Alignment Procedure. PAGE Z,8-C QB-3 Replacement Parts Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorised dealers. STO

32、CK DESCRIPTION STOCK N DESCRIPTION ASSEMBLIES 31251 Socket-Eight prong tube socket (RC -539D) 34864 Socket-Tuning tube socket 34502 Arm-Range a switch actuatingarm 31418 13638 Spring-Dial cord spring Spring-Dial cord tension spring 12717 Board-Phono input terminal board 37050 Switch-Range switch 370

33、92 Calibrator-Printed chart for Stock No. 37090 35636 Transformer-First I.F. transformer drum 35628 Transformer-Second I.F. transformer 12714 Capacitor-Plunger type air -trimmer 37898 Transformer-Driver transformer 37059 Capacitor -3 section mica trimmer 2.5 to 10 mfd. each section POWER SUPPLY UNIT

34、 ASSEMBLIES 33097 Capacitor -4.7 mmfd: (MI -8122) 35646 Capacitor -6 mmfd. 13200 Capacitor -30 mmfd., moulded 12720 Capacitor -100 mmfd. 31350 Capacitor -18 mmfd. 31796 Capacitor-.02 mfd. 35644 Capacitor -47 mmfd., ceramic 12484 Capacitor -0.25 mfd. 37329 Capacitor -47 mmfd., silvered mica 33879 Cap

35、acitor-Electrolytic 10 mfd., 300 volts. 12723 Capacitor -56 mmfd. 14289 Clip-Battery clips-one marked and one 35645 Capacitor -68 mmfd., ceramic unmarked 13057 Capacitor -68 mmfd., silvered mica 12819 Coil-Choke coil 30904 Capacitor -100 mmfd., mica 31794 Coil-Choke coil 30949 Capacitor -120 mmfd. 5

36、140 Ftise-5 amp. 13003 Capacitor -180 mmfd. 14409 Plug -7 contact female plug for power cable . . 12694 Capacitor -220 mmfd., moulded 12262 Resistor -680 ohms, watt 31433 Capacitor -580 mmfd. 4786 Socket-Vibrator socket 35643 Capacitor -3,000 mmfd. 31793 Transformer-Vibrator power transformer 34459

37、Capacitor-.0025 mfd. 31795 Vibrator-Plug-in vibrator 33584 Capacitor-.005 mid. 5148 Capacitor-.007 mfd. SPEAKER ASSEMBLIES 4987 Capacitor-.01 mid. (RL -90-5) 11915 Capacitor-.015 mfd. 92787 Capadtor-.05 mfd. 31825 Cap-Dust cap 4839 Capacitor -0.1 mfd. 35193 Cone-Speaker cone complete with voice coil

38、 . . 12484 Capacitor-.25 mid. (C39) 12567 Plug -5 prong male plug for speaker 12484 Capacitor-.25 mfd. (C42) 37899 Transformer-Output transformer 12741 Capacitor-.5 mfd. 32152 Capacitor-Electrolytic comprising 2 sections of 15 mfd., 250 volts each MISCELLANEOUS ASSEMBLIES 37093 Coil-A-B band oscilla

39、tor coil 37900 Back-Cabinet back cover 37055 Coil-A-B and 31 meter band antenna coil Coil-A-B and 31 meter hand R.F. coil 30716 37921 Clip-Tuning tube clip and thumb screw Crystal-Tuning tube crystal 35624 Coil -13 and 19 meter band oscillator coil 35389 Decalcomania-Range switch decal 37056 Coil -1

40、3-19 and 25 meter band antenna coil. 35392 Decalcomania-Trade mark decal 37058 Coil -13-19 and 25 meter band R.F. coil 35391 Decalcomania-Tuning decal 35625 Coil -25 meter band oscillator coil 35449 Decalcomania-Volume control decal 35626 Coil -31 meter band oscillator coil . 37281 Dial-Glass dial s

41、cale 37086 Condenser -3 gang variable tuning condenser. 37922 Indicator-Station selector indicator 37926 Control-Tone control and power switch 35652 Knob-Range indicator knob 37897 Control-Volume control and dial lamp switch. 35651 Knob-Range switch knob 32634 Cord-Drive or pointer cord (approx. 50

42、in. lg.). 35650 Knob-Tone switch knob 37090 Drum-Tuning condenser drum-less calibration 35955 Knob-Tuning or volume control knob chart 31480 Lamp-Dial lamp 37091 Flywheel-Wheel and tuning shaft assembly . 33438 Screw-Thumb screw for clip Stock No. 30716 37094 Link-Link, arm and bushing assembly 1427

43、0 Spring-Retaining spring for knobs Stock Nos. 14028 Nut-Clamping nut for Stock No. 12714 ca- 35650, 35955, and 35651 pacitor 4982 Spring-Retaining spring for knob Stock No. 31817 Plate-Cushion socket mounting plate 35652 - 12493 Plug -5 contact female plug for speaker cable 14404 Plug -7 contact ma

44、le plug 35841 Pulley-Drive cord pulley CV -110 A -C POWER SUPPLY UNIT 37089 Pulley-Left hand dial cord pulley and bracket 37088 Pulley-Right hand dial cord pulley and bracket 32015 Capacitor -1 mfd. (C2) 3159 Resistor -1,500 ohms, 1 watt 32013 Capacitor-Comprising 2 sections 16 mfd. each 34767 Resis

45、tor -2,200 ohms, watt (C1, C3) 30788 Resistor -4,700 ohms, 1 watt 14409 Plug -7 -contact plug for power output cable. 13998 Resistor -22,000 ohms, watt 32014 Reactor-Filter reactor (L1) 12798 Resistor -27,000 ohms, 4 watt 30880 Resistor -150 ohms, 4 watt (R1) 12454 Resistor -33,000 ohms, 4 watt 3125

46、1 Socket-Rectifier tube socket 30850 Resistor -58,000 ohms, 4 watt 31998 Transformer-Power transformer, 105-130, 140- 13715 Resistor -68,000 ohms, 4 watt 160, 200-250 volts, 25-80 cycles (T1) 12284 Resistor -220,000 ohms, watt 30648 Resistor -470,000 ohrrts, watt 30963 Resistor -820,000 ohms, 1 watt 12013 Resistor -1 meg., 1/30 watt 13730 Resistor -1 meg., 4 watt 30208 Resistor -1.2 meg., watt 11769 Resistor -1.8 meg., watt 12879 Resistor -2.2 meg., watt 37096 Shaft-Indicator shaft 37095 Shaft-Range switch actuating shaft 31364 Socket-Dial lamp socket