RCA-Victor-Co-Inc-Q44 电路原理图.pdf

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1、PAGE 462-C MODEL 044 Chassis No. RC -531 Eleven -Tube and Magic Eye, Eight -Band, Superheterodyne Electrical and Mechanical Specilications FREQUENCY RANGES POWER OUTPUT RATING Long Wave (X Band) 140-410 kc (2145-735 m) Undistorted 10 watts Medium Wave (A Band) 540-1,720 kc (555-174 m) Maximum 12 wat

2、ts Short Wave (B Band) 3.1-9.5 me (97.5.31.5 m) 31 Meter Spread Band 9.45.11.8 me (31.8.25.4 m) 25 Meter Spread Band 19 Meter Spread Band 16 Meter Spread Band 13 Meter Spread Band 11.65-15.2 mc (25.6-19.9 m) 15.1-17.75 mc (19.9-16.9 m) 17.73-18.5 mc (16.9-16.2 m) 21.45-22.5 mc (13.95-13.3) INTERMEDI

3、ATE FREQUENCY 455 kc RCA TUBE. COMPLEMENT (1) RCA-6SK7 R -F Amplifier (2) RCA-6SA7 Oscillator (3) RCA-6SA7 1st Detector (4) RCA -6B8 -G A.V.C. Amplifier (5) RCA-6U5/6G5 Tuning Indicator (6) RCA-6SK7 1st I -F Amplifier (7) RCA-6SK7 2nd I -F Amplifier (8) RCA -6R7 2nd Detector and 2nd A -F Amplifier (

4、9) RCA-6SK7 1st Audio Amplifier (10) RCA-6AD7-G Phase Inverter and Power Output (11) RCA -6F6 -G Power Output (12) RCA -5U4 -G Rectifier PILOT LAMPS 10 Type No. 51 6.8 volts, 0.2 amps. POWER SUPPLY RATING 105-125 volts, 50-60 cycles 125 watts 105.125 volts, 25.60 cycles 125 watts 100-130, 140-160, 1

5、95-250 volts, 40.60 cycles 125 watts qi e 4A 0101 ROWER 416 CONTROL _ RADIO -MONO 10 ELECTI V ITv CONTROL O MAGIC EYE - -Q fie - RANGE 1iAr INDICATORS TONE CONTROL . I, iPRA VOLUME TUNING CONTROL CONTROL PAL i R awwN AT ALA% cArcwnR a4-td LOUDSPEAKER Type 10 -inch Electrodynamic Voice Coil Impedance

6、 2.4 ohms at 400 cycles Identification Number 88885-502 Height Cabinet Dimensions (inches) .15 2%2. Chassis Base Dimensions (inches) . 31/e Weight 49 lbs (net) . Tuning Drive Ratio Width Depth . 247/16.12% 20 8/B .56 lbs (shipping) 25to 1 General Description Model Q44 is an eleven tube, eight band s

7、uperheterodyne receiver that uses a Magic Eye tube for tuning indications. Features of design include: Selectivity. control, spread bands for short wave reception, two new vertical thermometer type dials, magnetite core I -F and oscillator coils, temperature compensated circuits, one R -F and 2 I -F

8、 amplifier stages, separate A. V. C. amplifier stage, plug in phonograph connection and radio -phono switch, speech -music switch with continuously variable bass -treble tone control, and air core trimming capacitors. BLACK YELLOW BROWN RED PLUG K1N SREAKee GREEN SOCKET REDK - TO RECT. FIL. BLACKS 1

9、 1B OUTPUT TURC BLACK- PLATES BROWN - TO R4-2 BLACK -BROWN- TO CB2 FIELD COI L %DICE COIL 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 C Y _ _ 111 - X 4 0o0 GA1 =t . V um u_, i .-r0s eli -. _ a z r Wt / N4 ol r PAGE 463-C nr l* 1 N USe M s= t8;

10、m 9 I, O 1 f ul - m-2NNNNmra *l177717111 ei N Pm U+ U U 54333733ZSi c=0 J, b i .3 Ra= u= Y V Y 收音机爱 好者资料库 RadioFans.CN PAGE 464-C Alignment Procedure Cathode -Ray Alignment is the preferable method. Con- nections for the oscillograph are shown in the chassis drawing. Output Meter Alignment. -If this

11、 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 of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. Calibratio

12、n Scale on Indicator -Drive -Cord Drum. -The tuning dials are fastened in the cabinet and cannot be used for reference during alignment, 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

13、 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 in the alignment table. 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

14、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. To determine the corresponding frequency for any setting of the calibration scales, refer to t

15、he accompanying drawing which shows the dial with 0-180 calibration scales drawn at the sides. Pointer for 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 0 mark on the calibratio

16、n scale when the plates are fully meshed. $ $ -: g - a; R 8 - KC 400 350 300 250 200e 075 050: 049 0 x KC 07007 : 0400; 0200 P 0000 800 790 600; o 550 A MC 8.4 O 7.9 45 3.8 g0: 3.0 B MQ 00.8 O 00.9 005 00.0 MC 05.0 04.0 03.0 02.6 0 0 30 2S MC 08.7 073 oa;.a; o0.0 05.5 00J 0 PONOv ONNYp 010N 5 OPNp O

17、PONE o9: MC 08.6 08.2 08.0 07.8 OPppiSN ON =p noN o It MC 22.e 22.0 20.8 13 344 Spread -Band Alignment. -The most satisfactory method of aligning or checking the spread -band ranges is on actual reception of short-wave stations of known frequency, by ad- justing the magnetite -core oscillator coil f

18、or 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 frequency, and the magnetite - core oscillator coil for each band should be

19、 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. L22-09c. l2s.OfC. 21.5 MC. 17.75 MC. CI505C. C1e.o5t 52, f.5 MC. 560 M125-OK .?,._:+r5,_0_30. SC. 11.e N. I ,.e. L22.K. 6A C9 C55 C20 (/p175KC. .

20、/ z1.66bC f 3 666G ; 0KC.N 7 55 KC. l0 f5eorreK f4.7. fee.=K 61 455 KC, 7C, 6- 455 KC. Tube and Trimmer Locations (Top View) L22 (5,7.0. ,._. -/ 4m .r IM ,.e. A1 KV) e h.,1 Coil and Trimmer Locations (Bottom View) Precautionary Lead Dress: - 1. All oscillator leads should be kept as short as possibl

21、e. 2. Both yellow leads in the antenna switch section must be dressed towards the lug end and away from the coil windings, and also held to length. 3. Both yellow leads to adjacent lugs on detector coil must be dressed towards lug end and away from the coil windings, and also held to length. 4. The

22、following leads should be held to length from No. 8 on SI from No. 5 on S2 from No. 8 on S5 5. Lead from No. 4 on S15 must be dressed along the chassis away from all heater leads. 6. Lead from No. 5 on S15: well away from all heater leads. 7. The diode lead and the ground lead from the third LF must

23、 be twisted. 8. The diode lead and the ground lead from A.V.C. I -F transformer must be twisted. 9. The lead on No. 9 of S15 should be away from the volume control and first audio tube. 10. The two condensers on the oscillator heater must be as short as possible and dressed away by at least 1/4 from

24、 the bracket, parts wired to it, the yellow lead, and the oscillator grid lead. 11. Green, blue and double enamel leads from the oscillator coil nearest the rear apron must bear tightly against each other. 12. The oscillator grid coupling condenser must bear tightly against the styrol; the sprayed m

25、ica must likewise bear on the styrol from .the opposite side. 13. The long ground lead from the oscillator heater must be kept away from all condensers, resistors, and leads to R -F tubes. 收音机爱 好者资料库 RadioFans.CN PAGE 465-C /.I .S(/ ei t i2,it r ( ar,es .11 Left-Sharp At Right-Broad 1. 2. Step Conne

26、ct the high side of test-osc. to- Tune test osc. to- Turn radio dial to- Adjust the following for maximum peak output - 1 Turn selectivity control maximum counter -clockwise for maximum selectivity. 2 6SK7 2nd I -F grid in series with O1 mfd. 455 kc A Band Quiet point between 550-750 kc L37, L36 Thi

27、rd I -F Transformer 3 6SK7 1st I -F grid in series with Ol mfd. L34, L33 Second I -F Transformer 4 6SA7 1st Det. grid in series with 01 mfd. L31, L30 First I -F Transformer 5 With selectivity control in broad- position retouch L37, L36 for selectivity curve 2. 5A With selectivity control in sharp po

28、sition see that curve 1 has not changed appreciably. 6 6SA7 1st Det. grid in series with .01 mfd. 455 kc A Band quiet point 550-750 kc L39, L38 AVC Transformer* 7 Antenna Terminal in series with 200 mmfd. 360 kc X Band 360 kc (149) C19 (osc.)* C30 (det.) C75 (ant.) 8 175kc X Band 175 kc (51) L29 (os

29、c.) (Rock -in) 9 Repeat steps 7 and 8. 10 Antenna Terminal in series with 200 mmfd. l kc A Band 1,500 kc (150.5) C17 (osc.) C (det.) C4 (ant.) 11 600 kc A Band 600 kc (26) L28 (osc.) (Rock -in) 12 Repeat steps 10 and 11. 13 Antenna Terminal in series with 300 ohms 9.5 mc 31M Band 9.5 mc (21.5) L26 (

30、osc.)* C25 (det.) C3(nt.) 14 11.8 me 31M 11.8 mc Band ( 69.5) C11 (osc.)* 15 Repeat steps 13 and 14 until correct on dial. 16 9.5 me B Band 9.5 me (172.5) C15 (osc.)* 17 11.8 me 25M Band 11.8 me (36) L25 (osc.)* C24 (det.) Cl (ant.) 18 15.2 me 19M Band 15.2 me (37) L24 (osc.)* 19 17.75 me 16M Band 1

31、7.75 me (28) L23 (osc.)* C26 (det.) C2 (ant.) 20 21.5 me 13M Band 21.5mc (59) L22 (osc.)* * Connect oscilloscope to lug C of A.V.C. transformer. * Core of L29 should he approximately $ inches out before adjusting C19. *Use minimum capacity or inductance peak. * Use maximum inductance peak. NOTE: Osc

32、illator tracks above all signals except on 16 and 13 meter bands. PAGE 4t56- Qg Replacement Parts Insist on genuine factory -Meted parts, which are readily Identified and may be purchased hem authorized dealers. STOCK No. DESCRIPTION STOCK DESCRIPTION CHASSIS ASSEMBLIES (RC -531) 36618 Resistor-Volt

33、age divider comprising 1 section of 3,450 ohms, 7.5 watt, 1 section of 3,900 ohms, 3 watt, 1 section of 22 ohm 0.5 watt 31767 Board-Antenna-Ground board and 1 section 135 ohms, 3 watt 36625 Bracket-Angular support bracket complete with 36842 Resistor -5 ohms, 1 watt 2 pulleys 30152 Resistor -1,000 o

34、hms, 1 watt 36624 Bracket-Dial support bracket complete with 5 30654 Resistor -1,500 ohms, 4 watt pulleys 34767 Resistor -2,200 ohms, 4 watt 36626 Bracket-Support bracket with double pulley. 30128 Resistor -12,000 ohms, 4 watt 35642 Calibrator-Drive drum calibrator 36714 Resistor -15,000 ohms, 4 wat

35、t 12714 Capacitor-Air trimmer-medium-2-12 mmf. 13998 Resistor -22,000 ohms, 4 watt 36631 Capacitor-Mica trimmer comprising 3 sections 12454 Resistor -33,000 ohms, 4 watt of 2-20 mmf. each, 1 section of 5-50 inmf. 30787 Resistor -47,000 ohms, 4 watt and 1 section of 3-30 mmf. 13715 Resistor -88,000 o

36、hms, watt 38636 Capacitor-Mica trimmer -1 section of 8-80 14138 Resistor -68,000 ohms, 4 watt mmf. 14560 Resistor -100,000 ohms, 1 watt 36690 Capacitor-Mica trimmer comprising 5 sections 3252 Resistor -100,000 ohms, 1 watt of 3-30 mmf. each 13734 Resistor -520,000 ohms, 4 watt 35646 Capacitor -6 mmf

37、. 14583 jesistor-220,000. ohms, watt 33381 Capacitor -8.2 mmf. 12199 Resistor -270,000 ohms, watt 13200 Capacitor -10 mmf. 14983 Resistor -330,000 ohms, watt 13002 Capacitor -12 mmf., silvered mica 30784 Resistor -330,000 ohms, 4 watt 33380 Capacitor -12 mmf., ceramic 12285 Resistor -470,000 ohms, w

38、att 12948 Capacitor -33 mmf. 12013 Resistor -1 megohm, 1/10 watt 13141 Capacitor -47 mmf., silvered mica 13730 Resistor -1 megohm, j watt 33102 Capacitor -47 mmf., ceramic 12679 Resistor -2.2 megohm, 4 watt 12723 Capacitor -56 mmf., silvered mica 14350 Screw-No. 8-32 square head set screw for drive

39、36843 Capacitor -56 mmf., ceramic drum 12813 Capacitor -82 mmf. 36822 Shalt-Tuning shaft and flywheel 12720 Capacitor -100 mmf. 31364 Socket-Dial lamp socket 31813 Capacitor -120 mmfd., mica 35787 Socket-Phono input socket 12724 Capacitor -120 mmf., moulded mica 31251 Socket-Tube socket 30232 Capaci

40、tor -200 mmf. 34884 Socket-Tuning tube socket 36616 Capacitor -220 mmf., mica 31418 Spring-Drive cord spring 12694 Capacitor -220 mmf., moulded mica 31281 Spring-Retaining spring for adjustable coree 30984 Capacitor -330 mmf. and studs 13894 Capacitor -390 mmf 38820 Switch-Phono-radio-selectivity sw

41、itch 33295 Capacitor -580 mmf 38724 Switch-Power switch 38174 Capacitor -680 mmf. 36628 Switch-Range switch 12538 Capacitor -820 mmfd. 34684 Switch-Slide switch for tone control 30057 Capacitor -2,700 mmf. 38614 Transformer-let I.F. transformer 30303 Capacitor-.0035 mfd. . 36443 Transformer -2nd I.F

42、. transformer 4886 Capacitor-.05 mfd. 36615 Transformer-9rd I.F. and AVC transformer 33584 Capacitor-.005 mfd. 36977 Transformer-Power transformer -105-120 volt, 4937 Capacitor-.01 mfd. 25 cycle 4870 Capacitor-.025 mfd. 38473 Transformer-Power transformer -100.130 volt, 4839 Capacitor -0.1 mfd. 140-

43、180 volt, 190-220 volt, 230-250 volt, 36623 Capacitor-Electrolytic comprising 1 section of 50-60 cycles 30 mfd. 350 volts, 1 section of 5 mfd. 350 33726 Washer-C washer to hold drive cord pulley. volts and 1 section of 20 mfd. 250 volts 37435 Washer-C washer for tuning shaft 35016 Capacitor-Electrol

44、ytic comprising 1 section of 40 SPEAKER ASSEMBLY mfd. 450 volts and 1 section of 100 mfd. 25 volts (88886-602) 34649 Coil-Antenna coil-A band 36914 Coil-Field coil 34647 Coil-Antenna coil-B and 91 meter band. 36913 Cone-Cone complete with voice coil 32823 Coil-Antenna coil-X band 31539 Plug-S-prong

45、male plug for speaker 98829 Coil-Antenna coil -25.19-16-13 meter band. 36912 Transformer-Output transformer 36832 Coil-Oscillator coil-A and B band MISCELLANEOUS ASSEMBLIES 31837 Coil-Oscillator coil-X band 98617 34857 36633 36834 36835 Coil-Oscillator coil -13 meter band Coil-Oscillator coil -16 me

46、ter band Coil-Oscillator coil -19 meter band Coil-Oscillator coil -25 meter band Coil-Oscillator coil -91 meter band 37013 36839 34285 34285 36640 36796 Back-Cabinet back Bracket-Lamp bracket Clamp-Dial clamp l-Tun indicatortrbte clip aGlTuning indicator tube crystal CCrystal-Tuning Dial-Glass dial

47、scale for 25, 19, 16 and 13 94662 Coil-R.F. coil-A band meter bands 34650 Coil-R.F. coil-B and 31 meter band 36795 Dial-Glass dial scale for X, A, B and 34651 Coil-R.F. coil -25-19-16-13 meter band 91 meter bands i 33785 Coil-R.F. coil-X band . 36593 Indicator-Station selector indicator 34645 Conden

48、ser-Variable tuning condenser 35650 Knob-Power or selector switch knob 36621 Control-Tone control 34490 Knob-Range switch knob 36619 38093 31259 35627 12493 Control-Volume control Core-Adjustable core and stud for X band oscillator coil Core-Adjustable core and stud for oscillator coils, Stock Nos. 36617, 34657, 36632, 98633, 36634, 36635 Drum-Drive drum leas cali