RCA-Victor-Co-Inc-QB2 电路原理图.pdf

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1、AGE 2 MODELS 0B2 and P CB63-C Chassis No. RC -529 RC -529D CV -112 CONVERTER Six -Tube, Five -Band, Battery -Operated, Superheterodyne Electrical and Mechanical Specifications FREQUENCY RANGES Standard Broadcast (A Band) 540-1,720 kc (555-174 m) Medium Wave (B Band) 3.0-9.5 me (100-31.5 m) Short Wav

2、e 9.5-11.7 me (31.5.25.6 ml Short Wave 11.7-15.1 me (25.6-19.9 m) Short Wave 15.1-22.5 me (19.9-13.3 m) INTERMEDIATE FREQUENCY 455 kc RCA TUBE COMPLEMENT (1) RCA -1R5 1st Det.,-Ose. (2) RCA -1N5 -GT 1st I -F Amplifier (3) RCA -1N5 -GT 2nd I -F Amplifier (4) RCA -1H5 -GT 2nd Det., A -F, and A.V.C. (5

3、) RCA -1A5 -G Audio Driver Amplifier (6) RCA -1G6 -G Power Output BATTERIES REQUIRED 1-1.5 volt A Battery; 2-45 volt B Batteries CURRENT CONSUMPTION A 0.35 amperes B 12.6 milliamperes A. C. POWER SUPPLY RATING Using CV -112, A.C. power supply unit Supply Voltages 105-125 or 210-250 volts ; 50-60 cyc

4、les Power consumption at nominal supply voltages 15 watts B current drain 13.5 milliamperes at 90 volts dc output A current drain 0 35 amperes at 1.4 volts dc output POWER OUTPUT Undistorted 0.55 watts Maximum 0.65 watts LOUDSPEAKER (RL -92-2) Type 6 inch permanent -magnet dynamic Voice Coil Impedan

5、ce 3.4 ohms at 400 cycles QB2, QB6 I -F or A -F Transformer Breakdown: In 2nd production, a 10-megohm, i -watt resistor is connected across the + B circuit electrolytic capacitor to discharge the capacitor when the set is tuned off. This eliminates any voltage difference (retained by capacitor) betw

6、een the chassis and I -F and A -F trans- former primaries while the set is off and therefore reduces transformer breakdown due to electrolysis in humid climates. Receivers Height Width Depth CABINET DIMENSIONS 10 in. 15Z in. 711 in. Net Weight 17 lbs. Tuning Drive Ratio 25:1 TONE CONTROL LOUD POWER

7、-VOLUME TUNING RANGE CONTROL CANT ROL CONTROL A -C Power Supply Model CV -112 is a separate power supply unit. It is used to provide operating voltages for Model QB2 from an a -c supply source. Power ratings for the CV -112 are listed above. Precautionary Lead Dress: 1. All leads between antenna coi

8、l and switch must be as short as possible and kept away from the oscillator coil leads and switches. 2. Tap on 19-13 meter oscillator coil to pin No*. 6 on oscillator tube socket must be dressed as far away from the air trimmer as possible. 3. All oscillator coil leads must be kept apart from each o

9、ther, as well as other leads and parts. 4. Oscillator grid coupling condenser must bear against parts on S3, and be kept away from the shield between S2 and S3. 5. Check for correct bias cell polarity. Do not shunt with voltmeter. 6. The speaker leads must be kept from the volume control and as- soc

10、iated parts and leads. 7. The two paper condensers on the sides of the 2nd I -F transformers must be held close to chassis to reduce interstage coupling. QB6 (RC -529D) Service Data: Model QB6 is essential the saine as Model QB2, except for the following parts which are used in the QB6: Stock No. 37

11、976 Bracket -Tone control sup- port bracket 37999 Dial -Glass dial scale 36103 Decal -Power -volume decal 37839 Decal -Range switch decal 35392 Decal -Trade mark decal 35391 Decal -Tuning decal 37838 Frame -Dial frame complete, less dial and pointer 35650 Knob -Tone control knob 34861 Knob -Tuning k

12、nob 34862 Knob -Vol. control or range switch knob Model QB6. 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 TE 24-C QB-2, 9B- , CV-|12 $7 d7 f _ /td , I 3 (4 k o j o 1H 11, It. _, a! 收音机爱 好者资料库 RadioFans.CN PAGE 25-C QB-2, QB-6, CV -I 12 Alignment

13、 Procedure Cathode -Ray Alignment 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 to maximum. Test -Oscillator. -For all alignme

14、nt 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- ment, ther

15、efore 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, is given

16、 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 ml

17、ist 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 shows the dial with 0-180 calibration scales drawn at top and bottom. Pointer for Calibration Scale. -Improv

18、ise 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.-Af ter fastening the chassis in the cabinet, attach the di

19、al 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. C1- AMT 11.8 MC. C9.52-AMQ NT EMI C3-AnT. MIN cm, KC. J L11-oMC 5c. _ 9 5 L13-OSC, p f Yr 15.2 MC. / / 1 C19-OSC1. 10 / C16-OSC. L17. BOTTO

20、M L19 - BOTToM 9.5 MC. L9 -05C. 1500 KC. C4-O5C. 1_18. TOO L20 -Too 600 KC. 15.2 MC. 455 KC 455 KC. L 12- OSC 1GSG a s TI 1-15 - BOTTOM L 16 . TOP 455 cc. lsrfr 1N5 GT 2 2aEa.t.F 3 3441F mute Tub and Trimmer Locations 1115 GT. 150 112 Spread -Band Alignment. -The most satisfactory method of aligning

21、 or checking the spread -band ranges is on actual reception of short- 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

22、where the noise level is high enough to prevent reception of short-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 31 the spr

23、ead -band dials. The frequency settings of the test -oscillator may 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 sh

24、ort-wave stations of known frequency. 2. Use harmonics of the standard -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 test oscillato

25、r is employed for spread -band alignment, a final check should be made 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 informatio

26、n, refer to booklet RCA Victor Receiver Alignment. Connect the side of highSte the test-osc. to- Tune test- osc. to- Range switchdialmax. Turn radio to- . Adjust the fol- lowing for peak qutput 1N5GT-2nd I -F L20, L19 1 grid cap, in series with .01 mid. 3rd I -F transformer 1N5GT-1st I -F Quiet 1.18

27、, L17 2 grid cap, in series with .01 mid. 455 kc A point near 180 2nd I -F transformer 1R5 -1st Det. L16, L15 3 grid, in series with .01 mid. 1st I -F transformer 4 11.8 me 25M 138.5 L (osc.) Cll (ant.) 5 15.2 me 17 C4 (osc.)* 6 Ant. lead in series with Repeat steps 4 and 5. 7 15.2 me 13M 158 L13 (o

28、sc.)* 300 ohms 8 9.5 me 31M 158 LC (2 (ant.) cc. 9 9.5 me B 11.5 C19 (osc.) 10 1,500 k c 28 28 C (osc.) CS (aat.) Ant. lead A 11 in series with 200 mmf.(Rock 600 kc 150 L9 (osc.) gang) 12 Repeat s eps 10 and 11. * Use minimum capacity peak if two can be obtained. Check image to determine that C2 has

29、 been adjusted to the correct peak by tuning receiver to approximately 14.29 me (29) where a weaker signal should be received. * Peak at minimum position of plunger if two peaks can be obtained. * Peak at minimum capacity of two peaks can be obtained. NOTE: Oscillator tracks above signal on all band

30、s. 50 10 0 180 IIIIIII IIIIII1r1 Illllllnl Illlllllllllllll1111111t11111111111111 120 IV 1111n j1In111111111111111n11 IIn1IWn1111111 In111111111IIlnIJJ , -60 LRUM RSIIEr o OMt , vM o 0 IM e9.8 10.0 10:5 11.0 11.8 ec - - - 3 B 29 3.2 38 44 4 = 60 7 8 9 5 rne 25 ( roc. p *MN un2 o wnn O M- C M roaa O

31、aMl.a mnoaoE 0 oart 12.1 . 12.5 13.0 14.0 15.5 25 .550 600 om o a on ron 19-13 16.0 17.0 17:.:=.18.2 18.2 19.5 T.1.1=. 22.5 t Iallou o o u. ISM o O KAMM I - I, MEIERS In nim11nn1nn1m11nn1nn1nn1tt1nn1m11nn1nn11ar1rn111m1nnluulnnlnnlnnlnn1nn11nr11n11nn1nn1nn1nn1m11nn1nn11nllnulnnllml 180 170 160 150 1

32、40 130 120 110 100 90 80 70 60 50 40 30 20 10 0 100 800 1000 1200 1400 1100 kr un. o PM o le MUMS IS MnMS 19-13 Calibration Scale Reduced Reproduction of Receiver Dial and Corresponding 0-180 Calibration Scales The corresponding position of the dial indicator for any setting of the calibration scale

33、 can be determined by drawing a line from this point on the bottom calibration scale to the same point on the top calibration scale. For example: 150 on the calibration scale corresponds to approximately 600 kc on A band, etc. Read instructions under Alignment Procedure. 1GT 收音机爱 好者资料库 RadioFans.CN

34、PAGE 26-C Cl BCURReNT 14 MA. QB-2, Q-6, CV- I 12 rIF .FD. etT. A CURRENT 350 MA. D.P D 5vv. Zee iu e.a O iv-. AED.YEI o w. A -C Power Unit for 084: I ,Of Wm It I The CV -112 is designed to convert Model QB2 from battery to a -c operation. r 0.5n O.5n +a0v -5Dv. Reactivating RectiRer: Rr-m. -. = : e

35、4 n The A supply in the CV -112 power unit 7-34v COPPER ORIDE o A S .I Y. C-Lsv (used in Model QB2) is supplied through a 50- 40 CYCLES RECTIFIER 91601 (rate , copper -oxide dry -disc rectifier. If the radio 15 WATTS 1,1 vxpe ceases to operate or drops off in performance, BLUE _ ,- it may be due to

36、a chemical in change this (ANTENNA) rectifier, which causes the A voltage to drop low enough to affect the (GROUND) s. Bperformance of the re- ceiver. The normal A voltage is 1.5 volts. / ADAPTER This condition is more likely to occur in the CABLE ( 1 I RECEIVER I 1h, .r 1I q C PHONO POWER UNIT JACK

37、 MODEL CV -112 BATTERY CABLE 1 -,_.-,A, rectifier when the power unit has been out of SWITCH service for a long time (four months or more). jie I 234v.,117v. To reactivate the rectifier it is only neces- - / t sary to short the A plus and A minus terminals of the socket by connecting them together w

38、ith a piece of wire for a period of FOUR MINUTES. The high temperature de- veloped in the rectifier during this period has the tendency to restore the discs to their normal as V B BATTERY PACK 1.5 V. so V. B POWER SWIITC s .1_-fi -f rectifying ability. (2) (1) (3) SEPARATE A &B A -B PACK A -C POWER

39、Replacement Parts BATTERIES BATTERY SUPPLY Insist on genuine Factory -tested parts, which are readily identlged end may be purchased From authorized dealers STOCK DESCRIPTION STOC No.K DESCRIPTION J 35642 12714 33790 34654 35646 36012 31350 13141 35644 30949 12723 36072 35645 12720 30904 12694 31433

40、 36174 35643 33806 34459 33584 30938 32787 4839 12484 31581 35632 35631 36071 36065 36066 36067 38066 35819 36063 32634 34662 35788 35627 35638 34499 5119 30568 35641 35630 30146 12265 14559 30128 13998 13715 14560 12285 13730 5028 12679 30271 ASSEMBLIES (RC -529) Calibrator-Drive drum calibrator Ca

41、pacitor-Air trimmer-medium Capacitor-Electrolytic comprising two sections of 10 mid., 150 volt each Capacitor-Mica trimmer comprising 3 sections of 2.5-10 mmfd. Capacitor -6 mmfd. Capacitor -15 mmfd. Capacitor -18 mmfd. Capacitor -47 mmfd., silver mica Capacitor -47 mmfd. ceramic Capacitor -56 mmfd.

42、, mica Capacitor -56 mmfd., moulded Capacitor -66 mmfd. Capacitor -68 mmfd. Capacitor -100 mmfd., moulded Capacitcr-100 =Md., mica Capacitor -220 mmfd. Capacitor -560 mmfd. Capacitor -680 mmfd. Capacitor -3,000 mmfd. Capacitor-.0015 mfd. Capacitor-.0025 mfd. Capacitor-.005 mfd. Capacitor-.025 mfd. C

43、apacitor-.05 mfd. Capacitor -0.1 mfd. Capacitor -0.25 mfd. Cell-Bias cell Coil-Antenna coil-A band Coil-Antenna coil-spread band Coil-Choke coil Coil-Oscillator coil-A and B bands Coil-Oscillato, coil -13-19 meter bands Coil-Oscillator coil -25 meter band Coil-Oscillator coil -31 meter band Condense

44、r-Variable tuning condenser Control-Volume control and power switch Cord-Drive cord (approx. 28 in.) Cord-Indicator drive cord (approx. 77 in.) Core-Adjustable core and stud for A and B band oscillator coil Core-Adjustable core and stud for 13-19 meter, 25 meter, and 31 meter bands oscillator coils.

45、 Drum-Drive drum less calibrator Flywheel-Tuning shaft flywheel Holder-Bias cell holder Plug -3 contact female plug for speaker cable Plug -4 prong male plug for battery cable Pulley-Drive cord pulley Pulley-Drive cord pulley located between the range switch shaft and the tuning shaft Resistor -4,70

46、0 ohm, 4 watt Resistor -6,800 ohm, I watt Resistor -10,000 ohm, 4 watt Resistor -12,000 ohm, 4 watt Resistor -22,000 ohm, 4 watt Resistor -88,000 ohm, 4 watt Resistor -100,000 ohm, 4 watt Resistor -470,000 ohm, 4 watt Resistor -1 megohm, 4 watt Resistor -1.8 megohm, 4 watt Resistor -2.2 megohm, 4 wa

47、tt Resistor -4.7 megohm, 4 watt 13601 14350 35633 35637 35787 36069 31251 13638 31418 35640 35639 35622 36084 36062 36061 35636 36070 35628Transformer-Third 337286 2917 32907 36077 5118 35941 35649 35389 35392 35391 36103 35712 35847 35848 35652 35651 35650 36073 35653 4982 14270 4886 30873 36553 36547 38548 36549 36551 38552 18008 36550 33491 36546 Resistor -10 megohm, 4 watt Screw No. 8-32 square head set screw for drum Shaft-Range switch slip-on indicator shaft Shaft-Tuning shaft Socket-Phono input socket Socket -1R5 tube socket and ring Socket-Tube socket Spring-Drive cord spring Spr