RCA-Victor-Co-Inc-8K 电路原理图.pdf

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1、MODELS 7T, 7K, 8K, 8K1, 8T 8. 8T10 Seven -Tube and Eight -Tube, Three -Band, A -C, Superheterodyne Receivers MODEL 7T MODEL 7K C5C6CT ANT.ANT.ANT. 20,000K.0 00001CC, ISO 0 K.C. 28277-( OUTPUT REC 5 A.E CID TUNING TUBE NOT USED IN MODEL.ST / AND 7K AC32- DET 4, ANT. COIL AM.C. R4 16I SEC. e C18 .,.;

2、2 WIVERIEFF RAMS. ADJ.c1-1 12051 I(1:.-Ta:. 56,000n L I 0 3 I8* 20 .6K.11)IF L8 0.C) ii 0.cCOI L2 I OSC. IS NFS.isy.,. TRANS. L/ i 1111=., C13 -C16OSC.-WAVE TRAP OSC.OSC. OSC.600 K.C. 460 K.C. 20,000 N.C. 6000 N.D.1500 K.C. SEC A0.1 Radiotron, Coil, and Trimmer Locations MODEL 8K Electrical Specific

3、ations FREQUENCY RANGES Standard Broadcast.530. 1,800 kc Medium Wave1,800. 6,300 kc Short Wave.6,300.22,000 kc MODEL 81 MODEL 8T10 ALIGNMENT FREQUENCIES Standard Broadcast 600 kc (osc.), 1,500 kc (osc., ant.) Medium Wave6,000 kc (osc., ant.) Short Wave20,000 kc (osc., ant.) Intermediate Frequency RA

4、DIOTRON COMPLEMENT (1) RCA -6L7. First Detector (2) RCA -6J7 Oscillator (3) RCA -6K7. Intermediate Amplifier (4) RCA -6H6 Second Detector and A.V.C. Pilot Lamps (3) 460kc (5) RCA -6F5Audio Voltage Amplifier (6) RCA -6F6Power Output (7) RCA -5Z4Full -Wave Rectifier (8) RCA -6E5 (Models 8T and 8K only

5、).Tuning Tube Mazda No. 46, 6.3 volts, 0.25 amperes POWER -SUPPLY RATINGS Rating A 105.125 volts, 50.60 cycles, 80 watts Rating B. 105.125 volts, 25.60 cycles, 80 watts Rating C 100.130/140-160/195-250 volts, 40.60 cycles, 80 watts POWER OUTPUT Undistorted 2watts Maximum.4.5 watts LOUDSPEAKER Type.E

6、lectrodynamic Impedance (V.0 )2.2 ohms at 400 cycles 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 A2 Al 9110. to Ct 1 T1 11115,11A. 1514.1.A. 53 CONY. 617. 56,000 C OSC. 6.17 C18 -120110.1F.,C19 L6 *C13cri .09. C- 2-l2 MMF. 11-490 CIO 4500 MMF C

7、14 042 MMF I LT 9. 13610 MMF.!1B MMF. a CIA .t1t4 5. MMF. omik C12 = 555 MMF. C6R3 025 T22,000. END. L15 12900. RECT. 5Z4 C3611ELDC37 io 18 MFD. O 00, - 4170. PO EA, - 10oon. V7FiLS. PILOT LAMP ANT. C011. CONNECTIONS CISC. COIL CONNECTIONS I2R17 16. R113 70. RANGE1, FIXED SESANNT 5107.1i NO SEGMENT

8、116.10111,61WorrACT St. Lwow. DOS NT D R620 000 MMF INANON1E. EINADCANTPONT1014 No-rx, CONNECTICMS 4 PARTS SIOVNII DOTTED ARE NOT USED ON MODELS 7T 4 7K. 1 0-25 - MFO. r - - A Rio 21151114 $ 1.F. 5K7 - =TUNW6 TYRE ( 1 onta. F113C30 100,000A 0.1114F0 2-DET.4AV.C.,AF. R14 OUTPUT 6H6 , 270.000,. 6F6 56

9、000.14 13 . C26 a ion). Fl6 220. RIO 2.2 C27 .01 AFO C29R12 r25 0.00. C29 0.1 MFO. R19 22o. ni- is MAW CONNECTIONS n ntu. TIUW5F. CONNECTIONS 61 tlYee.1I T-70534-1 -Schematic Circuit Diagram 4 470.000 -ohm resistornot required when replacingcontrolwithStk. No. 13144) 25.6.R. MUM POWEN TIMM CONNECTIO

10、NS INNING TUNE 5E5 INSISTON RN, ID; CAPAOTIR C49, TUNING TAM CABLE ,YELLOW ANNE A NOT YIN M NNW 77471.1. 5 C31 .01 PAM - C32 120 MMF, UNK 5_57 PHONOR7MON TERM. BRD. C33 .015 INFO. 6 T2 C34 015 C35 16 .0o5 swn TONEU4 CONTRO 014 STSHAF) 19n. BLACK 0.3. 7V1 11 316. OUTPUT TR AN SF. T2 BROWN -BLACK BR W

11、N BLACK Lowispcakcr Wiring 收音机爱 好者资料库 RadioFans.CN PAGE 115-B 7T, 7K, 8K, 8K 1, 8T eativ.,0240v.; -0.2V. I 250V,Dv. t tut ,C16 05C. 1500 K C. (C13 IDOSC. 20,000 K.C. -C14 C.-1oiv.i05C. I;025v./06o00 K.C. 75V. ,C5 05C COI L ANT 20,000 K.C. C.GI,C6 ANT. 6000 K C .C7 v A.C. ANT 1500K C, (-1.35V.) -0.4V

12、. WAVE TRAP 010 -15 V. (-3.0V.44 CG OV.OV. 2 OV.1 r -t 70 64V. osc?_Th 6J7 0 ov. 11 F7F 6K7 I 15V0V. OV1110V. (1) 2I.F TRANS. L11,-PRI. ADJ 460I IsTIFTRANS. _31v 1-9 Act j, 6.4V A.C. -250V.- 100 V. ANT COIL BOTTOM FRONT OF CHASSIS CONY 6L7 r 6.4v. L_ _ _J 2DDET L - - -3V. - - -. 4A V C 6146 _r -F -

13、3 V.- - -Radiotron Socket Voltages, Coil, and Trimmer Locations volts, 60 -cycle supply-Tuned to approximately 1,000 kc-No signal beingreceived- Volume control minimum Note: Two voltage values are shown for sonic read- ings. The higher value shown in parenthesis with asterisk (*) indicates operating

14、 conditions without voltmeter load- ing. The lower value is the actual measured voltage and differs from the higher value because of the additional loading of the voltmeter through the high series circuit resistance. BLACK BLACK -RED TR. BLACK- RID TR.L LEAD CD -BLACK RED RED -SLACK BLACK E -YELLOW

15、PRIMARY M -BIBS? -o LAM. FILAMENTS BLUE YELLOV. RECT FIL. UU.OW MOWN - SLACK BROWN ROWN.-1 RECTIFIER FILAMENT 5 -VOLTS Primary resistance -24.5 ohms total Secondary resistance -668 ohms total -Universal Transformer Tuning Indicator An RCA -6E5 cathode-ray tuning tube is usedas a means of visually in

16、dicating when the receiveris accurately tuned to the incoming signal.This tube consists of an amplifier section and a cathode-ray sec- tion built in the same glass envelope. Maximum sensi- tivity of the tuning indicator is acquired in the Short wave position of the range selector S2 by removing the

17、ground connection from resistor R21.In this position, resistors R20 and R21 no longer act as a voltage divider and maximum voltage is applied to the grid of the tuning tube. AlignmentProcedure With tuning condenser fully meshed set point- er to end calibration at low frequency end of BC Band scale.

18、CATHODE RAY OSCILLIGRAPH CONNECTIONS: Connect verticalNHto junction of 127-R8. Connect vertical NO to chassis. STEP CONNECT HIGH SIDE OF TEST OSC. TO - TUNE TEST OSC To - TURN RADIO DIAL TO ADJUST THE FOLLOWING FOR MAX. OUTPUT 1 I -F Grid in series with 0.01 mfd 480 Kc Quiet point 800 Kc BC BandLi L

19、12L11 2nd I -F Trans. 2 1st Det. Grid in series with 0.0 imfd LiOL9 1st I -F Trans. Antenna in series with ter eswird Wave Trap Minimum Output 4 Antenna in series with 300 ohms 20000 KC 20 Mc RS 0 Band C 13tC5 A Osc.Ant. 58000 Kc 8000 Kc MED* Band C 14tC6 Osc.Ant. 6 Antenna in series with 200 mmfd i

20、goo Kc 1500 Kc BC Band Osc.Ant. 7600 Kc 600 Kc BC* Band L8L -F Osc. Rock Gang 8Repeat Step 5 tracks UseIltiniXtO5 Use=atom Osc. 480 capacity peak. capacity peak - ROCA GANG. lfcabove signalon all bands. 收音机爱 好者资料库 RadioFans.CN PAGE 116-B 7T, 7K, 8K, 8K1, 8T C31) PAGE 11.7-B Tr, 7K, 8 K, 8K1, 8T & 8T

21、10 REPLACEMENT PARTS -Continued STOCK No. DESCRIPTION LISTSTOCNoK . DESCRIPTION LIST 11315Capacitor -.015 Mfd.( C33 ) 11195Socket -5 -contact 5Z4 radiotron socket. 12670Capacitor -.035 Mfd. (C34) 11198Socket -7 -contact 6J7, 6K7 or 6L7 radio - 4836Capacitor -.05 Mfd. (C40) (Models 8Ttron socket and

22、8K) 11196Socket -8 -contact 6F5, 6F6, 6H6, radio - 4841Capacitor -0.1 Mfd. (C29) tron socket 11414Capacitor -0.1 Mfd. (C30) 11222Socket -Dial lamp socket 4840Capacitor -0.25 Mfd. (C28)11381Socket -Tuning tube socketandcover 5170Capacitor -0.25 Mfd. (C8, C21).,(Models 8T and 8K) 11240Capacitor -10 Mf

23、d. (C36) 12007Spring -Retaining spring for core Stock 5212Capacitor -18 Mfd. (C37) No. 12006, 12664 and 12711 -Package 12708Coil -Antenna coil and shield(L2, L3,of 10 L4,L5) .12849Spring -Tension spring for band indicator 12709Coil -Oscillator coil and shield(L6, L7,shutter link-Packige of 5 L8) 127

24、07Switch -Range switch(Si, S2) 12701Condenser -2 -gangvariabletuningcon denser (C4, C17) 12668ToneControl -Controlandoperating switch(R16, S3) 5119Connector -3 -contact female connector for speakercable 12652Transformer -First I.F.transformer corn plete(L9, L10, C20, C22) 12711Core -Adjustable core

25、and stud for Stock No.12709 11999Transformer -Power transformer 105.125 volts, 60 cycle (T1) 12006Core -Adjustable core and stud for Stock No. 12652 and 12653 12132Transformer -Power transformer 105:125 volts, 25 cycle (T1) 12664Core -Adjustable core and stud for Stock No.12654 12133Transformer -Pow

26、er transformer 100.250 volts, 60 cycle (T1) 12703Dial -Station selector dial scale 12653Transformer- SecondI. F.transformer 12702Drive -Vernier drive for tuning capacitor complete(L11, L12, C23, C24, C25, 12712Indicator -Stationselectorindicator R8, R9) pointer 12654Trap -Wave trap complete (LI) 522

27、6Lamp -Indicatordiallamp6.3volt- 13144Volume Control (R11) Package of5 12718 12738 Mask -Dial lightdiffuser complete with red, orange and green colored screen Resistor -27,000 ohms, insulated, 1/4 watt 12641 REPRODUCER ASSEMBLIES Board -Reproducer terminal board 11282 -Package of 5 (R10) Resistor -5

28、6,000 ohm, carbon type 1/10 watt -Package of5(R8) 12640 12012 11469 Bracket -Outputtransformermounting bracket Coil -Field coil(L15) Coil -Neutralizing coil (L13) 12286 11282 11281 Resistor -56,000 ohm, carbontype, I/4 watt -Package of 5 (R2) Resistor -56,000 ohm, carbon type, 1/10 watt -Package of

29、5 (R4) Resistor -100,000 ohm, carbon type, 1/10 watt -Package of 5 (R13) 12642 12667 5118 Cone -Reproducer coneanddustcap (L14) (Models 7T and 8T) Cone -Reproducer coneanddustcap (L14) nnect (Models 7K and 8K) Coor-3-contact male connector for 11398Resistor -220,000 ohm, carbon type, 1/10 speaker ca

30、ble 11453 11452 12285 12013 watt -Package of 5(R9) Resistor -270,000 ohm, carbon type, 1/10 watt -Package of5(R14) Resistor -470,000 ohm, carbon type, 1/10 watt -Package of 5(RI, R15) Resistor -470,000 ohm, insulated, 1/4 watt -Package of 5 (R12) Resistor -1 meg., carbon type, 1/10 watt -Package of

31、5 (R22) (Models 8T and 12666 9696 9699 11253 11886 Cover -Speaker cover (Models 7K and 8K) Reproducer Complete -(Models 7K and 8K) Reproducer Complete -(Models 7T and 8T) Transformer -Output transformer (T2) Washer -Spring washer to hold field coil securely -Package of S 8K) MISCELLANEOUS ASSEMBLIES

32、 11626Resistor -2.2 meg., carbon type,1,4 watt11996Bracket -Tuning tube mounting bracket -Package of 5 (R7, R20, R21)(Models 8T and 8K) 12004Resistor -Voltage divider comprising one 216 ohm, one 27 ohm and one 22 ohm 12698Crystal -Station selector crystal and escut cheon. sections (R17, R18, R19)127

33、42Escutcheon -Tuningtubeescutcheon 12715Resistor -Wire woundcomprisingone (Models 8T and 8K) 22,000 ohmandone10,000ohm12699Knob -Large tuning knob -Package of 5 sections( R3, R6)11582Knob -Tone control knob -Package of 5 4669Screw -No. 8.32 set screw for arm Stock12700Knob -Verniertuning knob(small

34、) - No. 12706 -Package of 10Package of 5 12651Shield -Coil shield for Stock No. 1270811347Knob -Volume control or range switch 12710Shield -Coil shield for Stock No. 12709knob -Package of 5 12735Shield -Dial lamp shield -Package of 5.11377Screw -Chassis mounting screw assembly 12008Shield-I.F. trans

35、former shield for Stock for Table Model -Package of 4 No. 12652 and 1265311210Screw -Chassis mounting screw assembly 12581Shield -Shield topforI.F.transformerfor Console Model -Package of 4 . . Stock No. 126534982Spring -Retaining spring for knob Stock 12607Shield -Shield topforI.F.transformer No. 12699 -Package of 10 Stock No. 1265211349Spring -Retaining spring for knob Stock 12704Shutter -Dial scale holder and shutter as- sembly for band indicator No.11347, 11582 and 12700-Pack- age of 5