RCA-Victor-Co-Inc-19K 电路原理图.pdf

《RCA-Victor-Co-Inc-19K 电路原理图.pdf》由会员分享，可在线阅读，更多相关《RCA-Victor-Co-Inc-19K 电路原理图.pdf（8页珍藏版）》请在收音机爱好者资料库上搜索。

1、收音机爱 好者资料库 RadioFans.CN PAGE 377-C MODEL 19K Chassis No. RC -512A Nine -Tube, Three -Band, A -C, Loop, Superheterodyne Electrical and Mechanical Specifications FREQUENCY RANGES Standard Broadcast A 540-1,600 kc Medium Wave B 1.5-4.0 me Short Wave C 5.8-18.0 me INTERMEDIATE FREQUENCY 455 kc TUBE COMP

2、LEMENT (1) RCA-6SK7 R -F Amplifier (2) RCA-6SA7 - 1st Detector -Oscillator (3) RCA -65K7 - I -F Amplifier (4) RCA -6H6 2nd Detector, A.V.C. (5) RCA-6SF5 A -F Amplifier (6) RCA -65F5- Phase Inverter (7) RCA -6F6 -G Power Output (8) RCA -6F6 -G Power Output (9) RCA -5Y3 -G Rectifier PILOT LAMPS (2) Ma

3、zda No. 51, 7.5 volts, 0.20 amp. POWER OUTPUT RATING Undistorted- 5 watts Maximum 5.5 watts CABINET DIMENSIONS Height 41 inches Width 28 inches Depth 16 inches Weight (shipping) 80 pounds Weight (net) 60 pounds Chassis Base Dimensions (inches) Height 2j, Width 18, Depth 6 Overall Chassis Height 1211

4、 inches Tuning Drive Ratio 15 to 1 L,IrSPEAIER (RL 0J-1) Tope 12 inch electrodynamic V.C. Impedance - POWER SUPPLY RATINGS Rating A 105-125 volts, 50-60.cycfes, 100 watts Rating B 105-125 volts, 25-60 cycles, 100 watts Adjustment for Electric Tuning This model has six push buttons for electric tunin

5、g. The buttons connect to separate magnetite -core oscillator coils and separate an- tenna trimmers which must be adjusted for the desired stations. lise an insulated screwdriver or alignment tool such as RCA Stock No. 31031. Allow at least five minutes warm-up period before making adjustments. The

6、procedure is as follows: 1. Make a list of the six desired stations, arranged in order from low to high frequencies. 2. Turn Range Control knob to A position, and manually tune in the first station on the list. 880 TO 1550 KC 740 TO 1430 KC I 610 TO I 125014C 1540 TO 11030 KC I 1 TRIMMER 0 0 0 I 0 0

7、 I0 SCREWS 0 0 0 I I 0 CORE 6 5 4 I 3 2 I 1 RODS Push Button Adjustments Increasing Sensitivity: These models have an untuned R -F stage which is resistance -coupled to the 1st -detector. The sensitivity may be increased by changing the R -F plate load resistor to a higher value, between 6,000 and 1

8、0,000 ohms. This change is not recommended in metropolitan localities owing to possiblity of cross -modulation. 2.2 ohms at 400 cycles Turn the Loop Antenna to give minimum pickup of signal, no outside, antenna should be used and link on antenna board should be closed. 3. Turn Range Control knob to

9、PB and press push button No. 1 and adjust No. 1 oscillator core to receive this station. Screw the core all the way in, to lowest frequency, and then unscrew slowly until station is received. 4. Adjust No. 1 antenna trimmer for maximum output on this station. Owing to the relatively high R -F gain,

10、it may be found that there are several settings of each push-button magnetite core that will bring in any particular station. In such cases it is advisable to unscrew the push button antenna trimmers to minimum capacity before adjusting the oscillator cores. Clockwise adjustment of cores and trimmer

11、s tunes the cir- cuits to lower frequencies. 5. Adjust for each of the remaining five stations in the same manner. 6. After all six stations are tuned -in on the buttons, turn the Loop Antenna to a position giving the best signal pickup and make a final careful adjustment of all core rods until best

12、 re- ception is obtained for each. Outdoor antenna should now be reconnected if used. Failure to Oscillate on Push -Button Tuning: Should a case of non -oscillation on any push- button range he experienced, check the oscil- lator grid leak to assure that it is 56,000 ohms. Some sets employed a 33,00

13、0 ohm leak which was occasionally found troublesome with low line voltage. Low -Frequency Oscillator Push -Button Coil: To ensure low -frequency coverage on the push-button oscillator coils in these models, a high -inductance coil, Stock No. 37133, is used for the 540-1,030 kc push-button oscillator

14、 ranges. 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 378-0 f 9K Alignment Procedure Cathode -Ray nugnment is the preferable method. Connections fot the oscillograph are shown in the schematic drawing. Output Meter Alignment.-If this meth

15、od 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. Calibration Scale

16、 on Indicator -Drive -Cord Drum.-The tuning dial is 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 is read

17、on this scale, which is calibrated in degrees. The correct setting of the gang in degrees, for each alignment frequency, is given in the alignment table. As the first step in r -f alignment, check the position of the drum. The 90 mark on the drum scale must be vertical, and directly under the center

18、 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 the accomp

19、anying drawing which shows the dial with 0-180 calibration scalesdrawn at top and bottom. Pointer for Calibration Scale.-Improvise a pointer for the cali- bration 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 calibration sca

20、le when the plates are fully meshed. Dial -Indicator Adjustment.-After fastening the chassis in the cabinet, attach the 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. Preacautionary Le

21、ad Dress. - 1. Dress 2nd I.F leads close to chassis. 2. Dress leads from volume control and tone switch away from fila- ments, diode and power leads. 3. Dress .005 mfd. volume control condenser away from electrolytic. RANGE rTUNING CONTROL 1T IV LF. ?RANS. LI TOP L2 BOTTOM AO1. 455110. ANT. CONDENSE

22、RS ON INDER SIDE Ci Oe CHASSIS CSC. 7tee; teml IV T.OSC. 2E LE 4 X_LS 00110. TRANS: NP DET. AVC OUTPUT .4 TOP LS BOTTOM ADJ. 455NC. OUTPUT IITOt1Rl0-CONTOROL I comma RECT. Tube and Trimmer Locations A G o o ANTENNA -GROUND TERM. BOARD LINK PHONO. OR TELEVISION POWER CORD CONNECTOR Back of Chassis St

23、eps Connect the high side of tat-osc. to- Tune test- osc. to- Range switch Turn radio dial to- Adjust the fol - lowing for max. peak output 1 6SK7 I -F grid in series with .01 mfd. 455 kc A Quiet Point 180 LS and L4 (2nd I -F Trans.) 6SA7 lstnear seatwith .01 mfd. Ll and L2 (1st I -F Trans.) 3 Ant.

24、terminal A in series with 47 mmf. 15.2 me C 148.5 Cl (ant.) C2 (osc.) 4 Ant. section raof gang series with 300 ohms 2.44 me B 97 C4 (osc.) 5 1,500 kc A 160 C5 (osa) 6 600 kc 30 L5 (ac.) (Rock gang) 7 Fasten chassis in cabinet. Connect loop, see that link is closed on the antenna board, attach dial i

25、ndicator to drive cord, with indicator at 540 kc mark and gang at maximum capacity. 8 Radiation loop consisting of two turns of wire 18 in. in diameter located 4 to 6 feet from receiver 1,500 kc A 1,500 kc C3 (op) (on l000p) 9 600 kc 600 kc L5 (osc.) (Rock gang) 10 Repeat steps 8 and 9 P ooN A P H O

26、 R T E L E V 1 5 Use minimum capacity peak of two peaks can be obtained. Note: Oscillator tracks above signal on all bands. ALL HIGHS,LEAST LOWS MINIMIZES BASS RESONANCE. FULL TONE -ALL HIGHS AND ALL LOWS T FOR ORCHESTRA AND OPERA. BEST GENERAL POSITION. ALL LOWS, MODERATE HIGHS REDUCES RECORD SURFA

27、CE NOISES AND NIGH -PITCHED TONES. ALL LOWS, LEAST HIGHS MINIMIZES RECORD SURFACE NOISES AND HIGH -PITCH ED TONES. TONE CONTROL ALL LOWS, LEAST HIGHS MINIMIZES STATIC AND HIGH- PITCHED INTERFERENCE. ALL LOWS, MODERATE HIGHS REDUCES STATIC AND HIGH-PITCHED INTERFERENCE FULL TONE -ALL HIGHS AND ALL LO

28、WS FOR ORCHESTRA AND OPERA. BEST GENERAL POSITION. ALL HIGHS, LEAST LOWS MINIMIZES BASS RESONANCE AND LOW-PITCHED INTERFERENCE. SPEECH POSITION. Tone Control and Phono -Radio Switch PHONO. OR TELEV. RADIO HIGH FULLl ! _ MOW EDIUM SOFT f LOUD FULL OFFS MEDIUIU M SLOWNIGH POWER- )LUME) vicTRoI.A-RADIO

29、 CONTROL TONE CONTROL 10 20 30 40 50 60 70 60 90 110 110 120 130 140 ISO 160 170 180 lD_. ._ ifi MI U6 Um 14 t:14 .14.11111 u w14 STaNORRO A 55 H 10 30 I00 120 140 = ,14.1.1. ,=14 f11 04 U.6 Um 2U .3 1H C B A PB TUNING RANGE CONTROL CONTROL R A D I O Location of Controls ODMESTIC O 10 20 30 40 50 60

30、 70 80 90 100 110 120 130 140 150 160 170 180 Calibration Scale Reduced Reproduction of Receizer Dial, and Corresponding 0-180 Calibration Scales The corresponding position of the dial indicator for any setting of the calibra- tion scale can be determined by drawing a line from this point on the bot

31、tom calibration scale to the same point on the top calibration scale. For example: 30 on the calibration scale corresponds to approximately 600 kc on A band. Read instructions under Alignment Procedure. 收音机爱 好者资料库 RadioFans.CN PAGE 379-0 19K 2 to z cf) - 1/4o U- N Q l$ Q N N Q Tw 4 a N 4 N Vl N la I

32、 J J m 111 .N991)12 F e U1 et * 8 T r - s4 ; u -IiHi. LLru N Ihg 2P4 rrf N LLL -. J E n N ril Y 000 9 Y s OF 8 o F W F .411* :ea gee, u 111 e p E O Z OQ ,J1Oli Q T PAG 30-C 19K Replacement Parts Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorize

33、d dealers. STOOo. CK DESCRIPTION STOCK DESCRIPTION 35966 35795 35961 14079 35791 35804 13057 12720 34699 34700 13003 12952 35877 13895 34506 33584 14393 32787 4839 35858 35965 35876 35789 38803 35960 35982 34662 35788 35871 35794 35970 35972 36009 5040 35973 32185 14720 14024 30694 35875- 12695 CHAS

34、SIS ASSEMBLIES (RC -512A) Board-Antenna-Ground board Calibrator-Drive drum calibrator Capacitor-Mica trimmer (C1) Capacitor -6.8 mmfd. Capacitor-Mica trimmer comprising 3 sections (C2, C4, C5) Capacitor-Mica trimmer comprising 6 sections for push buttons 1, 2, 3, 4, 5, 6 Capacitor -68 mmfd. Capacito

35、r -100 mmfd., moulded Capacitor -100 mmfd., mica Capacitor -120 mmfd. Capacitor -180 mmfd. Capacitor -330 mmfd. Capacitor -720 mmfd. Capacitor -5,600 mmfd. Capacitor-.0018 mfd. Capacitor-.005 mfd. Capacitor-.01 mfd. Capacitor-.05 mid. Capacitor -0.1 mfd. Capacitor-Electrolytic comprising 2 sections

36、of 10 mfd., 400 volts each and 1 section of 20 mfd., 25 volts Coil-Antenna coil-C band Coil-Coil and resistor assembly L8 Coil-Oscillator coil (A, B, C) Coil-Push button switch oscillator coil Condenser-Variable tuning condenser Control-Volume control and power switch Cord-Drive cord Core-Adjusting

37、core and stud for oscillator coil (L6) Core-Adjusting core and stud for push button oscillator coils 1, 2, 3, 4, 5, 8 Drum-Tuning condenser drive drum-less cali- brator Indicator-Station selector indicator and car- nage Plate-Dial plate complete with drive cord pul- leys Plug -2 -contact male plug f

38、or loop cable Plug -4 -contact female plug for speaker cable Pulley-Drive cord pulley Resistor -470 ohms, 2 watts Resistor -1,000 ohms, watt Resistor -2,700 ohms, I watt Resistor -3,900 ohms, watt Resistor -12,000 ohms, 3 watts Resistor -15,000 ohms, watt 12738 12454 12412 12199 12285 12679 13601 35

39、968 35772 35709 31364 31251 31418 35787 35974 35967 35984 35963 35636 35790 35588 35959 35969 31825 11469 33118 31275 5039 33444 36005 35998 38002 35914 36019 38006 38003 36004 11765 35997 36149 36802 35029 35999 34053 14270 Resistor -27,000 ohms, * watt Resistor -33,000 ohms, watt Resistor -47,000

40、ohms, * watt Resistor -270,000 ohms, * watt Resistor -470,000 ohms, watt Resistor -2.2 meg., watt Resistor -10 meg., * watt Shaft-Tuning shaft and pulley Shield-Bottom shield for power transformer Shield-Top shield for power transformer Socket-Dial lamp socket Socket-Tube socket Spring-Drive cord sp

41、ring Socket-Phono. input socket Support-Dial plate support Switch-Push button selector switch Switch-Range switch (S1, S2, S3, S4) Switch-Tone switch (S5, S6) Transformer-First I -F transformer Transformer-Second I -F transformer Transformer-Power transformer -110 volts, 25 cycle Transformer-Power t

42、ransformer -110 volts, 60 cycle-less end shields Washer-C washer for tuning shaft SPEAKER ASSEMBLIES (RL -70J1) Cap-Cone center dust cap Coil-Hum neutralizing coil Coil-Speaker field coil Cone-Speaker cone, voice coil, and dust cap Plug -4 -prong male, for speaker Transformer-Output transformer MISC

43、ELLANEOUS ASSEMBLIES Button-Push button Capacitor-Mica trimmer (C3) for loop Coil-Loop primary coil Decalcomania-Control panel decal Dial-Glass dial scale Escutcheon-Dial scale escutcheon-less dial Knob-Tone or range switch knob Knob-Tuning or volume control knob Lamp-Dial lamp Loop-Antenna loop Mar

44、ker-Station selector push button markers Mounting-Loop Mounting-Speakergip mounting mounting hardware Socket-Two contact socket for antenna loop Spring-Push pg-Rush button spring Spring-Retaining g-Retaining sprang for knobs BROWN SPEAKER PLUG FIELD BROWN PULLEY PULLEY, (,r ,._,) DRIVE CORD onurn b

45、-RED RED - . NEUT COILS TENSION e., -SPRING - BLACK VOICE COIL , RED CABLE SOCKET BLACK 3 TURNS _-:/ O O A (i. . o TO OUTPUT PLATES o- BLACK 0- 9 BRN: BLK.-TO OUTPUT SCREENS Arrangement o Drive Cords for Tuning Condenser Dial Indicator BROWN RECTIFIER FILAMENT and Connections and Colors of Loudspeaker and Cable