RCA-Victor-Co-Inc-QU3M 电路原理图.pdf

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1、PAGE9-C MODELS 026, QU3M, QU33C Chassis No. RC -507J, RC -507H, RC -507F Six -Tube, Five -Band, A -C, Superheterodyne Receiver and Radio -Phonograph Electrical and Mechanical Specifications FREQUENCY RANGES Standard Broadcast (A band) 540-1,720 kc (556-174 m) Medium ave (B hand) 3.0-9.5 me (100-31.6

2、 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 in) 19-13 Meter Spread Band 15.1-22.5 me (19.9-13.3 m) INTERMEDIATE FREQUENCY 455 kc POWER SUPPLY RATING QU3 105-125, 200-250 volts, 50-60 cycles, 80 watts total Voltages Frequency (cycles) Watts Q26 105-

3、125 50-60 65 105-125 25-60 65 105-125,200-250 . 50-60 65 LOUDSPEAKER QU3 Q26 lodel R1. -63J6 R1. -63K5 Type (Electrodynamic) 8 -inch 8 -inch V -C Impedance at 400 c.p.s 2.2 ohms 2.2 ohms POWER OUTPUT Undistorted Maximum PHONOGRAPH MOTOR- Self 1 watts 15 watts -starting, constant -speed, induction ty

4、pe. CRYSTAL PICKUP (QU3C) Impedance Average Output. 1.5 volts 100,000 ohms at 1,000 c.p.s. at 1,000 c.p.s, across 500,000 ohm load MAGNETIC PICKUP (QU3M) Impedance 96 ohms at 1,000 c.p.s. Average Output 0.14 volts at 400 c.p.s. across open circuit TUBE COMPLEMENT E1 s (1) RCA-6SA7 1st Detector -Osci

5、llator A ! (2) RCA -65K7 I -F Amplifier tsn (3) RCA-6SQ7 2nd Detector, A -F Amplifier, A.V.C. rrLnuo e (4) RCA -GAM -G. Phase -Inverter, Power Output f (5) RCA -6F6 -G Power Output (6) RCA5Y3-G Rectifier POWER- VOLUME TUNI NO RANGE (7) RCA 61.5 (Q26 only) Tuning Indicator CONTROL CONT ROL CONTROL CA

6、NA SOCKET 7 Model QU3 SLACK SLACK 10 OUTPUT RATES -15/1E-TO OUTPUT SCREENS SR0M1-RECTIFIER FILAMENT Victrola Attachment.-A jack is provided on the rear of Q26 for connection to a Victrola Attachment. The cable from the attachment should be terminated in a Stock No. 31048 plug to fit the jack. Schema

7、tic Showing Magnetic Pickup Connections 1.25 MFD. I I I M1 MOTOR 2MEG. F L4 El, Qr11Ty PICKUP GREEN .005 MFD. R 6000a GREEN 2,000l1 OSSMF6 0 2 56 - RADIO- PNONO SW. 120,0008 .035 S6 o = 100 VOL. CONTR. 500,000- TAP /rT 125i000 . 0015 Model Q26 Schematic Showing Crystal Jr F Pickup Connections 5600.0

8、 .007 2.21.1E4. - YELLOW 2 I CROWN L 22 OMIJ ,035 o iF 1100 VOL. CONTR. 500, 000 - TAP AT 135,000 . 0015 4 Note: Ixo.000 ohne on some models. 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 40-C 收音机爱 好者资料库 RadioFans.CN PAGE 4i-C QU-3, Q-26 Ali

9、gnment Procedure Cathode -Ray Alignmtnt is the preferable method. Connections 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 tu maximum. Test-Oscillator.-For all alig

10、nment operations, connect the low side 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.-The tuning dial is fastened in the cabinet and cannot he used for reference during align- ment, th

11、erefore a calibration scale is attached to thy indicator-drise- cord drum v.hich is mounted on the shaft of the gang condenser. The setting of the gang condenser is read on this scale, which is calibrated in degrees. The correct setting of the gang in degrees, for each align- ment frequency, is give

12、n in the alignment table. As the first step in r -f alignment, check the position of the drum. The 180 mark on the drum scale must be vertical, and directly over the 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

13、must be tightened securely when the drum is in the correct position. To determine the corresponding frequency for ally setting of the calibration scales, refer to the accompanying drawing which shows the dial with 0-180 calibration scales drawn at top and bottom. Pointer for Calibration Scale.-Impro

14、vise a pointer for the calibra- tion 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 calibra- tion scale when the plates are fully meshed. Dial -Indicator Adjustment. - After fastening the chassis in the cabinet, attach the

15、dial indicator to the drive cable with indicator at the 540 kc mark, and gang condenser fully meshed. The indicator has a spring clip for attachment to the cable. Spread -Band Alignment.-The most satisfactory method of aligning or checking the spread -band ranges is on actual reception of short- wav

16、e stations of known frequency, by adjusting 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 alignment, a final check should be made on actual reception of short-wave stations of kn

17、own frequency, and 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. Note: 6U, and 110-V receptacle on Q26 only. The Q(3II is equipped with a magnetic pickup, and the QU:SC with a Crystal pickup. The output of Die

18、 crystal pickup is fed into the audio end of the receiver through a switch and compensating circuit. On instruments using a magnetic pickup, a transformer and compensating circuit are used between the pickup and the audio input (see schematic diagram). The transformer has two jacks, the larger one (

19、primary) for input from the pickup and the smaller one (secondary) for output to the compensating circuit. The cotnponertts of the compensating circuit are mounted externally to the chassis on a terminal board in the cabinet. Connect the highSteps side of the test-osc. to- Tune test- osc. to- Range

20、switch Turn radio dial to- Adjust the fol- lowing for max. peak output 1 I -F grid in series with .01 mfd. 455 kc A Quiet Point near 180 L3 and L4 2nd I -F Trans. 2 1st Det. grid in series with .01 mfd. L1 and L2 1st I -F Trans. 3 Ant. lead in series with 300 ohms 11 8 me 25M 138.5 L5 (osc.) C1 (ant

21、.) 4 15.2 mc 17 C2 (osc.)* 5 Repeat steps 3 and 4 8 15.2 me 19-13M 156 L6 (osc.)* 7 9.5 me 31M 156 L7 (osc.)* C3 (ant.) 8 9.5 me B 11.5 C4 (osc.)* 9 Ant. lead in series with 200 mmf. 1,500 kc A 26 C5 (ant.) C6 (ant.) 10 600 kc 150 L8 (osc.) (Rock gang) 11 Repeat s eps 9 and 10 * Ise minimum capacity

22、 peak if two can he obtained. Check image to determine that C2 has been adjusted to the cortect peak by tuning receiver to approximately 14.29 me (29) where a weaker signal should be received. *Peak at minimum position of plunger ii ewn peaks can lie ulilained. *Peak at minimum capacity if two peaks

23、 can be obtained. NOTE: Oscillator tracks above signal on all bands. g.5 0 MC 0.9 0 O 0.I 0 O m0 D5.(5 0 O4.D D3.2 O D2.(5 0 0 25 D(5.g 0 Dg -D3 o o 收音机爱 好者资料库 RadioFans.CN .PAGE 42-C QU-3, Q-26 The phonograph motor has its bearing filled with oil and sealed at the factory and hence should not requi

24、re lubrication in the field. However the two rubber tired idler pulleys should have their bearings lubricated occasionally with S.A.E. 10 oil. Care should be taken not to get any oil, grease, or other foreign matter on the rubber tires. These tires and the motor spindle should be cleaned occasionall

25、y with quick drying naphtha. The turntable spindle bearing should also be lubricated occasionally with S.A.E. 10 oil. DRIVE WHEEL TURNTABLE If MOTOR SPINDLE MOT0R60ARD OIL HERE Motor Detail MOTOR TURNTABLE (MOTOR SPINDLE BOY, FOR MOTO ODENIN31 OIL NERE NEW NEEDLES 60Y, FOR USED NEEDLES NEEDLE SCREW

26、RADIO P1P110110. r PHONO -RADIO CONTROL r LOW FULL I TONE CONTROL PICKUP Top View Model QU3M Precautionary Lead Dress. - 1. All leads between antenna coils and switch must be as short as possible and kept away from oscillator coil, leads and switches. 2. All oscillator coil leads must be kept apart

27、from each other and other leads and parts. 3. Blue plate lead of 2nd I -F should be dressed under other leads and against chassis. The motor switch is automatic for both starting and stopping, and when properly adjusted, will turn the motor on as the pickup is moved from the pickup rest toward the t

28、uneable. The switch should be adjusted so that it will snap into the off position when the pickup needle is 12 inches from the center line of the spindle shaft. The motor may be shut off at any time by placing the pickup on the pickup rest. ROLLER - LEVER SPRING ACTUATING-_. LEVER CLIP CAM ASSEMBLY

29、-CAM SPRING CAM SET SCREW SPOOL SHELLAC- -MERCURY TUBE MERCURY SWITCH MECHANISM (VIEWED FROM FRONT SHOWN WITH PICKUP IN REST POSITION) OIL HERE TURNTABLEk (MOTOR SPINDLE (BOV. FOR r1EW OIL. NERE mo-ron 1 NEEDLES PICKUD RADIO PHONO /r PHONO -RADIO CONTROL EDLE LOW FULL HOLE I TONE CONTROL BOX. FOR US

30、ED NEEDLE SCREW-NEEDLES NEEDLE GAUGE PLATE 7op Viezt Model QU3C Loudspeaker.-To center the loudspeaker voice coil, first remove the front dust cover, then loosen the screws holding the spider assembly. Insert three narrow feelers into the air gap, and tighten the spider screws. Remove the feelers an

31、d fasten a dust cover in place with loud- speaker cement. Replacement Parts Insist on genuine factory -tested parts, which are readily Identified and may be purchased hom authorized dealers. STOCK No. DESCRIPTION STOCK No. DESCRIPTION CHASSIS ASSEMBLIES, 31433 Capacitor -560 mmf Model QU3C (RC -507F

32、) 35643 Capacitor -3,000 mmf. Model QU3M (RC -507H) 4838 Capacitor-.005 mfd., 1,000 volts Model Q26 (RC -507J) 33584 Capacitor-.005 mfd., 1,200 volts 33840 Capacitor-.007 mfd. (Models QU3C, QU3M). 33595 Cable-Shielded phono input cable for Model 4937 Capacitor-.01 mfd. (C25) QU3M 14393 Capacitor-.01

33、 mfd. (C28) 36398 Cable-Shielded radio -phono cable 11315 Capacitor-.015 mfd. (Model QU3C) 36397 Calibrator-Drive drum calibrator 4870 Capacitor-.025 mfd 12714 Capacitor-Air trimmer 5196 Capacitor-.035 mid. (Model QU3M) 34654 Capacitor-Mica trimmer -3 sections of 2.5-10 32787 Capacitor -.05 mid. (C1

34、9) mmf. 4886 Capacitor-.05 mfd. (C35) 35646 Capacitor -6 mmf 33014 Capacitor-Electrolytic, comprising 3 sections of 36012 Capacitor -15 mmf 10 mfd. and 1 section of 20 mid. 31350 Capacitor -18 mmf. 35632 Coil-Antenna coil-A band 35644 Capacitor -47 mmf., ceramic 35631 Coil-Antenna coil-spread band 1

35、3141 Capacitor -47 mmf., silvered mica 35623 Coil-Oscillator coil-A and B band 12723 Capacitor -58 mmf., moulded mica 35624 Coil-Oscillator coil -19.13 meter band 30949 Capacitor -56 mmf., m i c a (Models QU3C, 35625 Coil-Oscillator coil -25 meter band 35645 QU3M) Capacitor 35626 Coil-Oscillator coi

36、l -31 meter band 13057 -68 tumid., ceramic Capacitor -68 mmfd., silvered mica 35619 Condenser-Variable tuningcondenser 30904 Capacitor -100 mmf., mica (Models QU3C, QU3M) 36035 Control-Tone control (H.F.) (Models QU3C, QU3M) 12720 Capacitor -100 mmf., moulded mica 36416 Control-Tone control (Model Q

37、26) 12694 Capacitor -220 mmf. 35946 Control-Volume control and power switch. PALE, 43-C QU-3, Replacement Parts (Continued) Q-26 STOCK No. DESCRIPTION STOCK No. DESCRIPTION 32634 Cord-Condenser drive cord (approx. 3.4 inches overall) CRYSTAL PICKUP AND ARM ASSEMBLIES 32634 Cord-Pointer drive cord (a

38、pprox. 40 inches overall) For Model QU3C 35788 Core-Adjustable core and stud for A and 33906 Arm-Pickup arm-shell only B band oscillator coil 33908 Base-Pickup support arm base and retainer. 31259 Core-Adjustable core and stud for 19-13 meter, 33905 Crystal-Pickup crystal cartridge 31 meter and 25 m

39、eter band oscillator coils. 33907 Support-Pickup support arm complete - less 36396 Drum-Drive drum, less calibrator base . 35638 Flywheel-Tuning shaft flywheel 30868 Plug -2 -contact female plug for motor cable AUTOMATIC SWITCH ASSEMBLIES 5040 35630 Plug -4 -contact female plug for speaker cable Pul

40、ley-Drive cord pulley -1 inch dia. For Models QU3C and QU3M 35973 Pulley-Drive cord pulley-) inch dia. 34312 Base-Pickup arm base (QU3M) 36637 Receptacle-Power line receptacle (Model Q26) 34419 Base-Pickup arm mounting base (QU3C). 30735 Resistor -560 ohms, 1 watt 32865 Bracket-Switch bracket and te

41、rminal board. 13714 Resistor -5,600 ohms, j watt (Model QU3C) 34308 Cam-Switch cam assembly with spring 30128 Resistor -12,000 ohms, j watt 34007 Lever-Switch actuating lever, roller and clip. 35595 Resistor -15,000 ohms, 3 watt 34309 Mounting-Pickup arm base mounting (rubber 13998 Resistor -22,000

42、ohms, j watt grommet, washers and nut) 12454 Resistor -33,000 ohms, j watt 34311 Ring-Retaining ring for pickup arm pivot shaft 13715 Resistor -68,000 ohms, j watt (Model QU3M) 1.4195 Screw-No. 10-32x516 set screw for switch cam 14560 Resistor -100,000 ohms, j watt ( Model Q26) hub 13734 Resistor -1

43、20,000 ohms, j watt (Models QU3M, 36177 Shaft -Pickup arm pivot shaft (QU3M) QU3C) 34314 Shaft-Pickup arm pivot shaft (QU3C) 30493 Resistor -150,000 ohms, i watt 34310 Spool-Insulating spool for switch leads 13698 Resistor -180,000 ohms, j watt for QU3C. 32868 Spring-Switch lever spring 13479 Resist

44、or -390,000 ohms, j watt (Model Q26). 32867 Spring-Tension spring for switch cam 14983 Resistor -330,000 ohms, .1 watt (Models QU3M, 32866 Switch-Mercury tube and leads QU3C) 31608. Washer-Retaining washer for switch lever. 30648 Resistor -470,000 ohms, watt 12285 Resistor -470,000 ohms, j watt (Mod

45、els QU3M, QU3C) SPEAKER ASSEMBLIES 12013 Resistor-I megohm, 110 watt (Model Q26) (RL -63-J-6; RL -63-K-5) 13730 Resistor -1 megohm, j watt 12679 Resistor -2.2 megohm, j watt 13866 Cap-Dust cap (RL -63-J-6) 13601 Resistor -10 megohm, j watt 31825 Cap-Dust cap (RL -63-K-5) 14350 Screw-No. 8-32 square

46、head set screw for drum 12079 Coil-Field coil, 1,060 ohms 35948 Shaft-Range switch extension shaft 11469 Coil-Neutralizing coil (RL -63-J-6) 35949 Shaft-Tuning shaft 34615 Cone-Cone complete with voice coil. , 31364 Socket-Dial lamp socket 5039 Plug -4 -prong male plug speaker 35787 Socket-Phono-inp

47、ut socket (Model Q26) 14534 Transformer-Output transformer 31251 Socket-Tube socket 34864 Socket-Tuning tube socket (Model Q26) 13638 Spring-Drive cord spring MISCELLANEOUS ASSEMBLIES 31418 Spring-Pointer cord spring 36979 Back - Cabinet back cover (Models QU3C, 35622 Support-Tuning shaft support QU

48、3M) 36036 Switch-Radio phono switch (Models QU3M, Baffle-Baffle board, including rail and QU3C) 36592 pointer lamp bracket less grille cloth 35947 Switch-Range switch 36981 Bracket-Lamp bracket 32827 Switch-Voltage change switch 4288 Cap-Connector cap for pickup lead (Model 35636 Transformer-First I.F. transformer QU3C) 35628 Transformer-Second I.F. transformer 3.1285 Clip-Tube clip (Model Q26) 32910 Transformer-Power tr