RCA-Victor-Co-Inc-85T8 电路原理图.pdf

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1、PAGE 3 3 9- B L12 le6%tDe L14 SEC. A0. 460 KC *FCAMFG.CO.INC. MODEL8518 Five -Tube, Three -Band, A -C, Superheterodyne Receiver PHONO. TERM. 23D. .ECT I._ CZ -ANT 6000 KC j5Y3G r OUTPUTr SN- 77 2 01:9-0SC. 600 KC CIO-OSC 6000KC C32 -0SC 1300 KC OSC 20.0001 SC -Radiotron, Coil and Trimmer Locations E

2、lectrical Specifications Model 85T8 FREQUENCY RANGES Standard Broadcast (A) Short Wave -1 (B) Short Wave -2 (C) 540.1,500 kc 2,300.7,000 kc 7,000.22,000 kc R -F ALIGNMENT FREQUENCIES Short Wave -1 (B)6,000 kc (osc., ant.) Short Wave -2 (C) 20,000 kc (osc.) Standard Broadcast (A) . 600 kc (osc ), 1,5

3、00 kc (osc.) INTERMEDIATE FREQUENCY 460 kc RADIOTRON COMPLEMENT POWER SUPPLY RATINGS ( 1 ) RCA -6A8 -GFirst Detector-OscillatorRating A 105.125 volts, 50.60 cycles, 75 watts (2) RCA -6K7Intermediate Amplifier Rating B105.125 volts, 25.60 cycles, 75 watts (3) RCA -6Q7 -G. Second Detector, A.V.C., and

4、 A -F Amp.Rating C. 105.125/200-250 volts, 50.60 cycles, 75 watts (4) RCA -6F6 -GPower Output (5) RCA -5Y3 -GFull -Wave Rectifier PILOT LAMPS (2) 6.3 volts, 0.25 amp. POWER OUTPUT RATING LOUDSPEAKER Undistorted2.5 watts Type8 -inch Electrodynamic Maximum4.5 wattsV.C. Impedance 2.2 ohms at 400 cycles

5、 Alignment Procedure Calibrate the tuning dial by adjusting dial pointer to the low -frequency (end) calibration mark on dial with the gang tuning -condenser plates in full -mesh position. The pointer is soldered in place on the drive cable. Radiotron Cathode Currents Measured with Milliammeter Conn

6、ected at Tube Socket Cathode Terminals (1) RCA-I5A8G12.7ma. (2) RCA -6K78.2ma. (3) RCA -6Q7 -G0.35 ma. (4) RCA -6F6 -G38ma. (5) RCA -5Y3 -G59 5ma. STEP CONNECT HIGH SIDE OF TEST .0SC.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 46

7、0Kc Quiet point near goo Kc A Band L14L13 2nd I-F Trans. 2 1st Det.Grid In series with 0.01mfd L12L11 1st 1-F Trans. 3 Antenna in series with 300 ohms 6000 Kc 6000 Kc B Band CIOC2 Osc.Ant. 4woo Kc TIC 20000 Kc Band c7A Osc. 5 Antenna in series with 200 mmfd 1500 Kc 1500 Kc A gaudOsc C32 6600 Kc 800

8、Kc PAP Band L9L-F Osc. Rock Gang 7 Repeat Step 5 Use saximas capacity peak. Osc. tracks q60 Ic below sinal on C Band. 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 ANT. GND o =-7 C2C4 3-15 470 MME MMF. IsT OET. Q. OSC. 6ABG Ll -o1 L2 1.35sf L46 3

9、 r L4 24n. 62 12 =It 1 I Cl .0035 MFD A F11 33,000o A PRI. C3 15-4.0 MMF. C6 15-4001 NAME 1.5C C7 2-8e MMF C8 1600 P MMF .04A 10 r 450 MMF. F- R2 I.F. C1561.17 ifrilOMMF. -111 X111 TOP TERM _L 6, co C14 c 110 LIIL12 MMF 1.2ft7.26. /.1-2111- -111 -/ C27 120 MAW R4 2.2M EG. 2zOET., A.V.C. 8, AUDIO 6Q-

10、70 C2EI DPI - 120 MMF. I A 160 MMF 410,000n C16 0.1 M Fo.W_ CS 56 MME 83 18,000sL L6 0.37st C10 B 2-12 MME. L7LeNr 1.26A 0.656 Tz. IS 14 3 C17 0.1 = MFO. R7 22000n E,VOL. CO NTR. 1REI Fk17 /I 60 000n.sEcT. is000t, 2 250,000n. TOTAL 3 C30 .015 MFD. PHONO. TERM. BRD. 321 RI8 1 MEG C31 -r 005 MFD. - -

11、OPEN LINK FOR PHON0, C20OUTPUT 1.01 MFD.6F6G R9 2.2 MEG. II C22 2t .01 =_- MFO C21 270 MINE R10 270,0 0 On C13 = 0.25 MFD. R5 5600n. R14 10 MEG. RED C23 .r. .005 MED. 376n. RED BLACK T2 811 390,000n. 8 -_- CIS t_ 441is N. s.z. L91: LIO I .4 MME = -.- -9AC3121-2a-12mmF 1 -.= RANGE SELECTOR SHOWN IN A

12、 BAND POSITION. FOR / B AND C BANOS, ROTATE r-. VNNOB CLOCKWISE. 1 C12 - - MOVABLE SEGMENTS 10 (ROTOR) SWITCH PROGRESSES I MFD. IN THIS DIRECTION. 111 RCA P-84160-5 .LI0. L ANT. COIL oe 11 L2.I.3 1.3 L4L4 OSC. COIL 1.10 63 13.3.-25n. T1 GREEN GREEN RED-ZI BROWN RED-* III/ BLACK. RECT. 5Y3G FIELD L16

13、 1290n CNON U.C24 BROWN T 1 MED. BROWN -BLACK 670:1. - 1110.n. - ITO HEATERS 18,0IAL LAMPS BLUE -Schematic Circuit Diagram Cl2 C26 BLACK - RED- C12 ELECT. CAP C25 IM6FD TRI2 2TO A I / L15 1.8n HUM NEUT. COIL 0.1n. R13 22n C 26 -BROWN C26 10 MED. 收音机爱 好者资料库 RadioFans.CN PAGE 341-B 85Te tt, tiitit 1,

14、,11 , 11.I 1 i1 I I I 355V. I I 1 1 I A.C. I III It 330V.,3556. I I I I I ek 97V.: I ri.,: I I1 I 5v.nt.v8. :II I At. -RECT 243V.I I L._ 5V3.6 II I 125561 riFI ,(-176.) -t2.rz,-t-i-0.5v. -C6 TI_Cgr - C.,- - OUTPUT 6F6 -G t f 1 1 1I 1 I (*)(-2.9V4) 1-17v. -26V. OV I I I1oG 255V. II-1 I87V. r - - - -,

15、1 ELECT CAP II6.3V.i -C55 ,L,4a,A.C. L4-4-_J, l.DET. 805C. I 1.F.TRANSF. 648-G I .ki-PAao.;. 44 (-2.96.) 1- 7 .-6.3v c24 (5-.- DROWNA.C. 0 ELECT i I.F. CAP . 330V. 6e7 - 97V.- - - - ./L _- (EILACF7-CrT,- RED - Ci2.n2 6.3V C.G. C26 A.C.,.,_2.1.1.F. TRANSF I-7ti:V*1 1.13,SRI L. .,-,L3V.)1-r-1- Note: T

16、wo voltage values are shown for some read- 0,6* ., A.V C. %AF.I ings. The value shown in parentheses with asterisk (5) 187V. 607 -G , indicates operating conditions without voltmeter loading. ,(*) ,(-13v.) .0.1V.0.2V. BOTTOM VIEW -REAR OF CHASSIS 584140-o L i -Radiotron Socket Voltages and Trimmer L

17、ocations Measured at 115 volts, 60 -cycle supply-Tuned to approximately 1,000 kc (Standard Broadcast)- No signal being received-Volume control minimum-Tone control optional REPLACEMENT PARTS Insist on genuine factory -tested parts,whichare readily identified and may be purchased from authorized deal

18、ers. STOK STOCK No.C DESCRIPTION No. DESCRIPTION RECEIVER ASSEMBLIES 30151Resistor -18,000 ohms, insulated, 1 watt (R3) 14284Resistor -2.2,000 ohms, carbon type, 1/10 watt (R7) 14380Arm-Hub and arm for operating band indicator shutter 12454Resistor -33,000 ohms, insulated, * watt (R1) -fastens on ra

19、nge switch shaft12199Resistor -270,000 ohms, insulated, * watt (R10) 14352Belt-Station selector drive belt 13005Resistor -390,000 ohms, carbon type, 1/10 watt (R11) 13216Board-Antenna and ground terminal board 11452Resistor -470,000 ohms, carbon type, 1/10 watt (R2) 12717Board-Phonograph terminal bo

20、ard 11626Resistor -2.2 meg., carbon type, a watt (R4, R9) 12607Cap-Top shield cap for firsti-f transformer 13601Resistor -10 meg., insulated, * watt (R14) 12581Cap-Top shield cap for second i-f transformer 30582Retainer-Band indicator disc retainer 11350Cap-Grid contact cap 14343Ring-Retaining ring

21、for range switch shaft 12807Capacitor-Adjustable trimmer (short) (C7) .14350Screw-No. 8-32 x 3/16 -inch square -head set screw for 12714Capacitor-Adjustable trimmer (medium) (C32) drum, Stock No. 30584; arm, Stock No. 14380, and 12896Capacitor -15 mmfd. (C18) pulley, Stock No. 30587 12723Capacitor -

22、56 mmfd. (C5)14340 Shaft-Drive pulley and knob shaft-fastens on range - 14262Capacitor -110 mmfd. (C14, C16) switch shaft 12404Capacitor -120 mmfd. (C27, C28)3682Shield-Radiotron shield 12406Capacitor -180 mmfd. (C19) 12008Shield-I-f transformer shield can 12488Capacitor -270 mmfd. (C21)5119Socket-I

23、-contact speaker cable socket 12812Capacitor -450 mmfd. (C9)11196Socket -8 -contact Radiotron socket 30433Capacitor -470 mmfd. (C4) 14114Socket-Dial lamp socket 30592Capacitor -1,600 mmfd. (C8)12007 Spring-Retaining spring for core, Stock No. 12008 30303Capacitor-.0035 mfd. (C1)30585Spring-Tension s

24、pring for pointer cord 4838Capacitor-.005 mid. (C23, C31)30588Spring-Tension spring for idler pulley 14393Capacitor-.01 mfd. (C20, C22)30620Switch-Range switch (Si, S2) 11315Capacitor-.015 mfd. (C30)30574 Tone control and power switch (R18, S3) 4839Capacitor -0.1 mfd. (C16, C17)14376 Transformer-Fir

25、st i-f transformer (L11, L12, C14, C15) 12484Capacitor -0.25 mfd. (C13)14308Transformer-Secondi-ftransformer (L13, L14, C19, 11203Capacitor -10 mfd. (C24)C27, C28, R7) 30577Capacitor Pack-Comprising two sections, each 10 mfd.30571 Transformer-Power transformer,105-125volts,25-60 (C12) ,C26) cycles (

26、T1) 5212Capacitor -16 mid. (C25) 30617Transformer-Power transformer, 105-125 and 200-250 4358Clamp-Mounting clamp for capacitor pack,Stock No. volts, 50-60 cycles (T1) 30577 30575Volume Control (R8) 30621Coil-Antenna coil (L1, L2, L3, L4) 30579Coil-Oscillator coil (L5, L6, L7, L8, L9, L10) REPRODUCE

27、R ASSEMBLIES (RL-63F-1) 30573Condenser -2 -gang variable tuning condenser (C2, CI, C6) 14356Board-I-contact reproducer terminal board 30586Cord-Station selector indicator pointer cord 13866Cap-Cone center dust cap 12800Core-Adjustable core and stud for oscillator coil 12012Coil-Field coil (L18) 1200

28、6Core-Adjustable core and stud for i-f transformers 11469Coil-Hum neutralizing coil (L17) 30622Dial-Station selector dial scale 12642Cone-Reproducer cone /and dust cap (L15) 30581Disc-Band indicator disc with celluloid window 5118Plug -3 -contact male plug for reproducer 30672Drive-Vernier drive sha

29、ft and pinion gear for variable 14360Reproducer-Complete condenser Drum-Station-selector 14358Screw-Screw, washer, and lockwasher to hold core in 30584drive -cord drum with set scr. , - yoke 30583Indicator-Station-selector indicator pointer a n d ho.r 14365Transformer-Output transformer (T2) 5226 14

30、028 assembly Lamp-Dial lamp Nut-Jamb nutforadjustablecapacitor,StockNos. 14357Washer-Spring washer to hold field coil 12807 and 12714 MISCELLANEOUS ASSEMBLIES 30587Pulley-Drive-belt pulley for condenser shaft30593Escutcheon-Dial escutcheon and crystal 14636Pulley-Drive-belt idler pulley14359Knob-Sta

31、tion selector knob 14625Resistor -22 ohms, carbon type, a watt (R13)14269Knob-Tone control, volume control, or range -switch knob 13819Resistor -270 ohms, insulated, wire -wound, 1.1 watt (R12)14287Screw-Chassis mounting screw and washer assembly 11298Resistor -5,600 ohms, carbon type, 1 watt (R5)14270Spring-Retaining spring for knob, Stock No. 14269 12695Resistor -15,000 ohms, insulated, I watt (R17)4982Spring-Retaining spring for knob, Stock No. 14359 收音机爱 好者资料库 RadioFans.CN