RCA-Victor-Co-Inc-QB1 电路原理图.pdf

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1、PAGE 8-C MODELS QB1 and QB9 Chassis No. RC -529-A RC -529-H Five -Tube, Five -Band, Battery -Operated, Superheterodyne MODEL QD 1 Electrical and Mechanical Specifications FREQUENCY RANGES Standard Broadcast (A Band) 540-1,720 kc (555-174 m) Medium Wave (B Band) 2 9-9.5 me (103-31.5 m1 Short Wave 9 5

2、-11.8 me (31.5-25.4 in ) Short Wave 11.7-15.2 me (25.6-19.7 in) Short Wave 15.05-23 me (19.9-13 m ) INTERMEDIATE FREQUENCY 455 kc RCA TUBE COMPLEMENT (1) RCA-6SA7 1st-Det.-Osc. (2) RCA -6S7 I -F Amplifier (3) RCA -6T7 -G 2nd-Det., A.V.C., and 1st Audio (4) RCA -6W7 -G Driver (5) RCA -6Z7 -G Power Ou

3、tput POWER OUTPUT Battery Supply A -C Supply Undistorted 3.1 watts 3 0 watts Maximum 4.5 watts 4 0 watts POWER SUPPLY RATINGS With vibrator power supply unit (RS -115) : 6.3 volts, total current drain 3.2 amperes With A -C power supply unit (CV -9X1: 100-130/140-160/195-250 volts, 25-60 cycles 38 wa

4、tts MODEL QB 9 Receiver LOUDSPE.KER IRL -92-5) Type 6 -inch, permanent -magnet dynamic Voice -coil Impedance at 400 cycles 3.4 ohms Height Width Depth CABINET DIMENSIONS 108 in. 151 in. 78 in. Net Weight 17 lbs. Tuning Drive Ratio 25:1 Electrical and Mechanical Specifications FREQUENCY RANGES Standa

5、rd Broadcast (A Band) 540-1,720 kc (555-174 m) Medium Wave (B Band) 2 9-9.5 me (103-31.5 m) Short Wave 9.5-11.8 me (31.5-25.4 m) Short Wave 11.7-15.2 me (25.6-19.7 m) Short Wave 15.1-22.5 me (19.9-13.3 m) INTERMEDIATE FREQUENCY 455 kc RCA TUBE COMPLEMENT (1) RCA-6SA7 lst-Det.-Osc (2) RCA-6SS7 I -F A

6、mplifier (3) RCA -6T7 -G 2nd-Det., A.V.C., and 1st Audio (4) RCA -6W7 -G Driver (5) RCA -6Y7 -G Power Output POWER OUTPUT Undistorted 1.4 watts Maximum 2.1 watts POWER SUPPLY RATINGS With vibrator power supply unit (RS -115B): 6.3 volts, total current drain 2 7 amperes LOUDSPEAKER (RL -79C3) Type -

7、6 -inch, electrodynamic Voice -coil Impedance at 400 cycles 3.4 ohms Precautionary Lead Dress. - 1. All oscillator coil leads must be kept apart from each other as well as other leads and parts. No two leads may be less than inch apart. 2. Oscillator grid coupling condenser, C17, must bear tightly a

8、gainst switch or other condensers, and the green gang lead must bear against C17 from the other side. Cement with amberoid. i/ lQIN 1 FULL. 31i1 CABINET DIMENSIONS Net Weight Tuning Drive Ratio QB 9 Height Width Depth 108 in. 178 in. 71 in. 17 lbs. 25:1 3. C5 (560 mmf.) must be placed exactly midway

9、 between the two (19-13M and 25M) coils; it must be at least 1 inch away from any coil leads. 4. C12 (47 mmf.) condenser must be at least j inch away from all parts and leads. 5. C13 (68 mmf.) condenser must bear against the switch and/or C17, grid coupling condenser and be cemented with amberoid, o

10、r else clear all parts and leads by at least inch. 6. Antenna grid coupling condenser must be as far away from all metal parts as possible. 7. Braids between gang and chassis must be so soldered as to be as far away from stator lugs as possible. 8. Both condensers on the front switch lug No. 8 (with

11、 green antenna gang lead) must be as far away from metal shields of the switch and all other metal as possible. 9. AVC by-pass condenser (C19) must clear the tuning flywheel by at least b inch. TONE CONTROL POWER -VOLUME TUNING CONTROL CONTROL RANGE. CONTROL 10. Make sure the bias cell polarity is c

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15、 QB- I, QB-9 Alignment Procedure Cathode -Ray Alignment is the i cier;,de null -A. (unnectinns fnr the oscillograph are shown in the diagram. Output Meter Alignment.-li this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. Tat-Oscillator.-For

16、ill alignment 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 be used for reference during align-

17、ment, therefore a calibration scale is attached to the indicator -drive. cord drum which 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,

18、 is given in the alignment table. As the first step in r -f alignment, check the position of the drum. The 180c mark on the drum scale must he vertical and directly over the mister of the gang -condenser shaft when the plates are fully meshed. The drum is held to the shaft by means of two set screws

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

20、le.-Improvise 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, att

21、ach the dial indicator to the drive cable with indicator at the 540 kc mark, and gang cpndenser 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 sh

22、ort- wave 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. In exceptional cases, when the set is being serviced in a location where the noise level is high enough to prevent reception of shor

23、t-wave stations, a test -oscillator may be used for alignment, but an extremely high degree of accuracy is required in the frequency settings of the test -oscillator, as a slight error will produce considerable inaccuracy on the spread -band dials. The frequency settings of the test -oscillator may

24、be checked by one or both of the following methods: 1. Determine the exact dial settings of the test -oscillator (for fre- quencies at or close to the specified alignment frequencies) by zero -beating the test -oscillator against short-wave stations of known frequency. 2. Use harmonics of the standa

25、rd -broadcast range of the test -oscil- lator, first checking the frequency settings on this range by means of a crystal calibrator (RCA Stock No. 9572), or by zero -beating against standard broadcast stations. When a tat oscillator is employed for spread -band alignment, a final check should be mad

26、e on actual reception of short-wave stations of known 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. For additional information, refer to booklet RCA Victor Receiver Alignment. Steps Connect the

27、high side of the test-osc. to- Tune test- osc. to- Range switch I Turn radio dial to- Adjust the fol - lowing for max. peak output On oscillator -circuit cores and trimmers, if two peaks can be obtained, use the one of minimum inductance or minimum capacity. 1 1st I -F grid cap, in series with .01 m

28、fd. 455 kc A Quiet point near 180 L15 and L16 2nd I -F transformer 2 1st Det. grid, in series with .01 mfd. - L13 and L14 1st I -F transformer 3 Ant. lead in series with 300 ohms 11.8 me 25M 138.5 L11 (ose.) Cl (ant.) 4 15.2 me 17 C14 (osc.)* 5 Repeat steps 3 and 4. 8 15.2 me 19-3 156 L12 (ose.) 7 9

29、.5 me 31M 156 (osc .) C2 (ant.) 8 9.5 me B 11.5 C7 (osc.) 9 Ant. lead in series with 200 mmf. 1,500 kc A 28 C4 (osc.) C3 (ant.) 10 800 kc 150 L8 (osc.) (Rock gang) 11 Repeat steps 9 and 10. Use minimum capacity peak if tiro can be obtained. Check image to determine that C14 has been adjusted to the

30、correct peak by tuning receiver to approximately 14.29 me (29) where a weaker signal should be received. NOTE: Oscillator tracks above signal on all bands. wv 19-13M C 14 O osc COILS C4O BAND SWITCH o 31M OSC COIL O c7 25-19-13M ANT. COILS A-8-31 M ANT. COILS 0 TUNING POWER -VOLUME j r DEL -06C L14

31、TOP 1-CCI II C148KG 455 KC .Ilel jCIZI.LI.F MC L Io-9.5MC L1 2:15.214C-152MC TRANS 1C3C p L11-11.8MC I.F. 2(tt tF 557 TRANS. 23 DET. AVC-AF 411 DRIVE OUTPUT C7 L8 C4 LIti111P L580T7014 9.5MC 600NC 1500KL 455 KC VI B. POWER UNIT PHONO. JACK PAGE 1.2-C QB-I,QB-9 MODEL GB 1 Replacement Parts tested Dar

32、ts. which are readily identified and may be purchased from authorized dealers. STOCK No. DESCRIPTION STOCK No. DESCRIPTION CHASSIS ASSEMBLIES 30963 Resistor -820,000 ohms, watt (RC -529A) 13730 30208 Resistor -1 meg., watt Resistor -1.2 meg., watt 35642 12714 Calibrator-Drive drum calibrator Capacit

33、or-Air trimmer, medium 12679 14350 Resistor -2.2 meg., watt Screw-No. 8-32 square head set screw for 34654 Capacitor-Mica trimmer comprising 3 sections drive drum of 2.5-10 mmfd. 35637 Shaft-Tuning shaft 35646 Capacitor -6 mmfd. 35787 Socket-Phono input socket 36012 Capacitor -15 mmfd. 31251 Socket-

34、Tube socket . 31350 Capacitor -18 mmfd. 13638 Spring-Drive cord spring 35644 37329 Capacitor -47 mmfd., ceramic Capacitor -47 mmfd., silvered mica 31418 35640 Spring-Pointer cord spring Support-Drive cord pulley support with one 30949 12723 Capacitor -56 mmfd., mica Capacitor -56 mmfd., moulded mica

35、 35639 pulley . Support-Drive cord pulley support with two 35645 13057 Capacitor -68 mmfd., ceramic Capacitor -68 mmfd., silvered mica 35622 pulleys Support-Tuning shaft and flywheel support 30904 Capacitor -100 mmfd., mica 33397 Switch-Tone switch 12720 Capacitor -100 mmfd., moulded mica 35636 Tran

36、sformer-First I.F. transformer 13003 Capacitor -180 mmfd. 35628 Transformer-Second I.F. transformer 12694 Capacitor -220 mmfd. 37898 Transformer-Driver transformer 31433 Capacitor -560 mmfd 37924 Transformer-Output transformer. 35643 Capacitor -3,000 mmfd: 33726 Washer-C washer for pulley 34459 Capa

37、citor-.0025 mfd. 2917 Washer-C washer for tuning shaft 4838 Capacitor-.005 mfd. . 4937 Capacitor-.01 mfd. POWER SUPPLY ASSEMBLIES 32787 Capacitor-.05 mfd. (C19, C27) 4886 Capacitor-.05 mfd. (C35) 30433 Capacitor -470 mmfd., moulded mica 14626 Capacitor-.07 mfd. 30673 Capacitor -470 mmfd., mica 12484

38、 Capacitor -0.25 mfd. 35573 Capacitor-.008 mfd. 37868 Capacitor -0.5 mfd. 4937 Capacitor-.01 mfd. 37250 Capacitor-Electrolytic-20 mfd., 250 volts. 32405 Capacitor-Electrolytic 16 mfd., 350 volts 37867 Capacitor-Electrolytic-30 mfd., 250 volts. 37834 Case-Power supply case only-less case cover 31581

39、Cell-Bias cell 14289 Clip-Battery clips 35632 Coil-Antenna coil-A band 37925 Coil-Choke coil 35631 Coil-Antenna coil-spread band 5140 Fuse -5 Amperes 35623 Coil-Oscillator coil-A and B bands. 34765 Resistor -100 ohms, watt 35624 Coil-Oscillator coil-19-13 meter band. 6134 Resistor -1,200 ohms, 1 wat

40、t 35625 Coil-Oscillator coil-25 meter band 35572 Resistor -2,200 ohms, watt 35826 Coil-Oscillator coil -31 meter band 14409 Socket-Female socket for battery cable 35619 Condenser-Variable tuning condenser 12241 Socket-Vibrator socket 37833 Control-Volume control and power switch. 35544 Transformer-V

41、ibrator transformer 32634 Cord-Drive cord (approx. 28 inch overall length) 35543 Vibrator-Plug-in vibrator 34662 Cord-Pointer cord (approx. 54 inch overall length) SPEAKER ASSEMBLIES (R L-92-5 ) 35788 Core-Adjustable core and stud for A and B band oscillator coil 32907 Cap-Dust cap 31259 Core-Adjust

42、able core and stud for 19-13 36077 Cone-Cone complete with voice coil meter, 25 meter, and 31 meter bands oscillator coils 5118 Plug -3 -prong male plug for speaker 35627 Drum-Drive drum-less calibrator 35638 Flywheel-Tuning shaft flywheel MISCELLANEOUS ASSEMBLIES 31580 Holder-Bias cell holder 5119

43、Plug -3 -contact female plug for speaker cable 38103 Decalcomania-On-off decal 14404 Plug -7 -prong male plug for power input cable 37839 Decalcomania-Range switch decal 35841 Pulley-Drive cord pulley 35392 Decalcomania-Trade mark decal 35630 Pulley-Drive cord pulley located between the 35391 Decalc

44、omania-Tuning decal range switch shaft and the tuning shaft 35712 Dial-Glass dial scale 13714 Resistor -5,600 ohms, watt 37838 Frame-Dial frame complete-less indicator and 30151 Resistor -18,000 ohms, 1 watt dial scale 13998 Resistor -22,000 ohms, watt 35648 Indicator-Station selector indicator 1245

45、4 Resistor -33,000. ohms, watt 37837 Knob-Range switch or volume control knob. 13734 Resistor -120,00d ohms, watt 35650 Knob-Tone switch knob 13479 Resistor -390,000 ohms, I watt 34489 Knob-Tuning knob 30848 Resistor -470,000 ohms, * watt 14270 Spring-Retaining spring for knobs Range Switch in OB1 :

46、 In Replacement Parts, add Stock No. 35621 range switch. 190 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 IJIl1111111II111111IIIIIIIII11111IIII III II I Il l lllll lll IIII I Illlllllllllllllllllllll11111IIIIIIII Illl l llll IIIIIIIIII llll ll l l llllllllllllll llll11111111I11111111

47、11411IIIIIIII t1II I IIII MOeO LITT o o lOM 31 0 YT 9.8 10.0 )0,.5. .Ent O O IMM - 25 ( A 550 isiY0 TOM .uo 0 .,M, I .Do. o o sMmM Mum o o Emu. Ms o 0110111, 600 700 12.1 12.5 13.0 800 1000 1200 MIN Kt nm nns o 0 usM. ,MM. o O MIA 0,100 OtlOMMMaO lV METERS M TN O 1t,;0 11.0 EYrE 18.2 S m 11.0 - .14.0 11.8 mc 31 15.5 mc) ) 2 5 1400 1700 kt A 19.5 ruts O = ROM 2 2.5 mc 19-13 lo METERS 13 METERS Ill IIII I II I I I I1111I1!III In1pI II I111111111pn I I IIIIInninn11n11n11I11111 n111n11111nI MnI1E1r1E1111llnll 1 1 llnllpnlln n111 IIIll n 1llnp nllnnl1111111111 160 170 160 150 14