RCA-Victor-Co-Inc-84BT6 电路原理图.pdf

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1、MODELSPA -B 84BT8-133f Four -Tube, Single -Band, Battery Operated, Superheterodyne Receivers SECROJ. LG - 400 AC. SEC RDJ. Le 400 KC. 5N-715 Radiotron and Trimmer Locations (Model 84BT) ANT C3 MOOKC SEC ROJ LB 400 KC. OSC MOOKC. SN-710 -Radiotron and Trimmer Locations (Model 84BT6) Model 84BT or 84B

2、T6 MODELeitBT Conversion to 1-1/2 v.operation. Refer to page 824B. Electrical Specifications Frequency Range930-1,720 kc Alignment Frequency1,500 kc(osc., ant.) Intermediate Frequency RADIOTRON COMPLEMENT (Nloom. 84BT) (1) RCA -1C6FirstDetector-Oscillator (2) RCA -1A4.Intermediate Amplifier (3) RCA

3、-1F6Second Det., A -F Amp., and A.V.C. (4) RCA -1F4Power Output Pilot Lamp84BT, (1) Mazda 2.0 BATTERIES REQUIRED 460 kc ( MODEL 84BT6) ( 1) RCA -6A7FirstDetector-Oscillator (2) RCA -6D6 Intermediate Amplifier (3) RCA -75Second Det., AF Amp., and A.V.C. (4) RCA -42 Power Output volts, .06 amp.; 84BT6

4、, (1) Mazda No. 40, 6.3 volts, 0.15 amp. 84BT .A, one plug-in,2V2 -volt Air Cell,or one 2 -volt storage battery; B, three 45 -volt, heavy-duty, plug-in type B batteries; C, one 41/2 -volt C battery tapped at11/2 volts. 84BT6A, one 6 -volt storage battery; B, none required; C, three bias cells (Stock

5、 No. 12681). CURRENT CONSUMPTION MODEL 84BT MODEL 84BT6 A at2volts0.42 ampere. A at6 volts 2.95amperes B at 135 volts 25 ma(Suppliedfromvibrator) Fuse Rating1/2amp. 5amps. POWER OUTPUT Undistorted. 0.3watt Maximum0.5watt LOUDSPEAKER Type: permanent -magnet dynamicDiameter: 6 inches Voice coil impeda

6、nce: 21/4 ohms at 400 cycles. Bias Cells (Model 84BT6 only).-The bias cells are used only for the purpose of supplying bias potential and should never be measured with an ordinary voltmeter or other device which draws any current. A simple check on the cells may be made by connecting a milliammeter

7、inthe plate circuit of the tubes biased by these cells(6A7 or 6D6, 2 cells;75,1cell). Measure the plate current with the cells in the circuit, then carefully remove the cells and substitute a voltage equivalent to the rated cell voltage.If the first read ing obtained (with bias cells)is more than 40

8、% from the latter reading (with known voltage), the bias cells should 0.5 watt 0.8 watt be replaced.This 40% difference is equivalent to a change of approximately 25% battery voltage. Precautionary Lead Dress (Model 84BT6 only).-(1) Green lead from antenna coil to antenna section of tuning condenser

9、 should be dressed asfar as possible from tube No.1(6A7).(2)Dress brown and green twisted leads (vibrator transformer T2 to vibrator socket) under capacitor C21. (3) Dress brown -black lead (T2 to C25) away from red lead which connects terminal in vibrator compartment to SG of tube No. 4 (42).(4) Ke

10、ep all other leads in vibrator compartment as close to chassis base as possible. 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 316-B 84BT 8. 84 BT6 CZ I 4.4 55 MMF LlL2 362 cop52 ,- ; 0. Clz-zommF 1 MED. _L EXTGND. CHASSIS 3 0 1.11, L,3 C4 2

11、5-310 MMF. 1TDET4 C6-2-20JMFC5-1zommr. OSC.-ICB-r11I La-Iln L4 LS - 5.72 33C0F/40D. 7.221 O -C7 MFD 45V 45 4 Fl 1/2.AMP 2V STORAGE BATTERY FUSE. ADD 0.66 OHM RESISTOR IN SERIES WITH POSITIVE (+IA - WHEN USED WITH 292 VOLT AIR -CELL BATTERY NOT USED WITH 2 voLT sToRAGE BATTERY. sa rWI SI Ra. 22,0002:

12、 CIO 0.25 MFD C9 MMF I.F. IA41.7-1-lir ArL8-1. 2 2 ZI mL ri CI a Ir T.:a. ,zco ii R3 ,i mmr. 22100 R4 20.0)20 EMIR C13 180 MME R7 2E0 C14 -.Do25 R5- 2.2MEG. 2DET., A V. C. 4,A.F.- IFS 14 1 MEG OUTPUT I F4 C0C17 .007 MFD 0 CIS0 IMF /C19 4 MFD VOL. CONTROL R6 10 MEG 5 DIAL LAMP .1. 64951 0 Le CI 0.1MF

13、-CLIEr 33 L.5L4 52 DIAL LIGHT -Schematic Circuit Diagram (Model 848T) 1.70E7. 05C. 6R7 GD6 TO HEATERS 0.652 AMP LID L.1 PI DC1= WATT. iSl 6Le. BATT5W 0.25 P 2111-1). 3 / teo T.22,z. C9MM. 56 MN* L5 L6I111 L7 LB V BRAT OR 10412. RI I 6 80.2 22 MP C23 .0IMPO. RI2 6B02. .0J25 MFD 144 250,0,10 TIL VOLUM

14、E CONTROL O Vr. TI 4,- C18 0035 MFD -4 5V CBATTERY R3C14 -dlOTL7r14 144vELLow r SHIELD V!RUE RECORD PLAYERPLAYER CONNECTIONS D5T.,RVC.A F001 N1Fr,.OUTPUT 75 C17 42 RIO PS 270000 470 DP,A R2 22 0002 2902 L15 0 QS IC25C26C27 ,Act/ C24 0MFD.13MED. I 7T -Schematic Circuit Diagram (Model 848TO) CAB 00r M

15、FD. P-84052-0 4CI4 -dt,REEN YELLOW RECORD PLAYER CONNECTIONS. NOTE: On later production Model 84BT6, an RCA -41 output tube is used in place of the RCA -42. All circuit and speci- fication data remain the same except the A current consumption at 6 volts which is 2.65amperes. 收音机爱 好者资料库 RadioFans.CN

16、PROIKYE PAGE 317-B 84BT 41URE. 1C-:-? 125V-6V. - - CATHODE CURRENT HAS VAT. NA1 . .151B5. MS RM. C.G. 2.06T,A.V.C., I. F. -50V. -75 606 OUTPUT 5, A. F 42 V)-1 ;4N ilgire2.1.F TRANS r* 51601 V.(04 (31V.(82 155V., *- 1673V. 163y. e;fete el 7 0 V. ; BOTTOM VIEW -REAR OF CHASSIS MODELS4STS P-84075 135V.

17、407(50V (-4.5 .211. -0.1V. 129Y.II e PLATE CURRENT NAl ETD. NAL OF411,11. NAL53 MS. HAS N4 10.01.1,115. I It1 66V. 2V.135V.:(-3V.t 0.911.91+,11_, 01111 ;4(49.eL rR i 1TDOSC.Is* I.TRANS. IC6 C.G (-0.9V.*) r- t 2VtiL135-V.: I. F 4 I A4 OUTPUT2. DET,A.V. 1F4- 1F6e.G. -I.5v 20V. V., , 2V., tr BOTTOM VIE

18、W- REAR OF CHASSIS MODEL 1146T -Radiotron Socket Voltages, Coil, and Trimmer Locations Measured with all batteries at normal voltage-Tuned to approximately 1,000 kc- No signal being received-Volume control optional *CAUTION: Do not attempt to measure voltages on control grids of the 6A7, 6D6, or75,w

19、ith any conven- tional voltmeter due to presence of bias cells. Note: Two voltage values are shown for some read- ings.The higher value shown in parenthesis with as- terisk (*)indicates operating conditions without volt- meter loading. Alignment Procedure Calibratethe tuningdialby adjustingdialpoint

20、er to the lowfrequency (end) calibration mark on dial scale with the gang tuning -condenser plates in full -mesh position.This is a friction adjustment. -66V.- PRI. ADJ. V I.F.TRANS. Order of Alignment Test Oscillator Receiver Dial Setting Circuit to Adjust Adjustment Symbols Adjust to Obtain Connec

21、tion to Receiver Dummy Antenna Frequency Setting 1 I -F Amp. Grid Cap .001 Mfd.460 kc No Signal 550-750 kc 2nd I -F Trans. L7 and L8Max. (peak) 2 1st Det. -Osc. Grid Cap .001 Mfd.460 kc No Signal 550-750 kc 1st I -F Trans. L5 and L6Max. (peak) 3Ant. Lead200 Mmfd.1,500 kc1,500 kcA Osc.C6*Max. (peak)

22、4Ant. Lead200 Mmfd.1,500 kc1,500 kcA Ant.C3Max. (peak) * C6 is in two sections. Tighten section on bottom of gang (under chassis) for maximum capacity before adjusting top section. 收音机爱 好者资料库 RadioFans.CN PAGE 38-B 84BT & 84BT6 BLOCKING OF MODEL 848T Should any blocking tendencies be noted on this r

23、eceiver, the 1F4 tube should be exchanged. Blocking which is produced by the 1F4 tube is particularly notioeable when the battery .witch Is turned off and immediately turned on again. Near on the ocarteet of the battery switch may bring this action about when the reoeiver is tint turned on. In such

24、oases, It is advisable to replace the switch, and at the ease time, investigate the condition of the 1F4 tuba as wellas the E batteries. REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers STOCK No. DESCRIPTION 4289 142

25、86 14288 12607 12581 12118 4288 4828 12629 14262 12404 12724 12408 1 4 3 20 5107 5005 5148 5196 11854 4841 4840 12741 14287 13046 14310 12681 14289 14285 14257 12179 14256 5119 14314 12006 14264 4286 3748 5140 14316 14319 14283 4290 4348 4340 14313 12818 8063 5031 12330 11305 14284 11364 12333 RECEI

26、VER ASSEMBLIES Body -Fuse connector body (Model 84BT6 only) Bracket -Dial lamp bracket Cable -3 -conductor battery cable approximately 80 inches long,complete withfuseandbatteryclips(Model 84BT only) Cap -FirstI -F transformer shield cap Cap -Second I -F transformer shield cap Cap -Grid contact cap

27、Cap -Fuse connector male cap (Model 84BT6 only) Cap-Radiotron shield cap Capacitor -56 Mmfd. (C9) Capacitor -110 Mmfd. (C8) Capacitor -120 Mmfd. (C11, C12) Capacitor -120 Mmfd. (C5, C16) Capacitor -180 Mmfd. (C13) Capacitor -330 Mmfd. (C7, C20) (Model 84BT6 only) Capacitor -.0025 Mfd. (C14) Capacito

28、r -.0035 Mfd. (C18)(Model 84BT only) Capacitor -.007 Mfd. (C17)(Model 84BT only) Capacitor -.007 Mfd. (C17, C18) (Model 84BT6 only) Capacitor -.01 Mfd. (C22, C23) (Model 84BT6 only) Capacitor -0.1 Mfd. (Model 84BT, Cl, C15)(Model 84516, CI, C10, C24) Capacitor -0.25Mfd.(Model84BT,C10)(Model 84BT6, C

29、19) Capacitor -0.5 Mfd. (C21)(Model 84BT6 only) Capacitor -Pack comprising two sectionseach4Mfd. (C7, C19) (Model 84BT only) Capacitor -8 Mfd. (C25) (Model 84BT6 only) Capacitor Pack -Comprising one 10Mfd. and two8 Mfd. sections (C15, C26, C27) (Model 84BT6 only) Cell -Bias cell (Model 84BT6 only) C

30、hp-2 batteryclips,one marked + and one un- marked Coil -Antenna coil (LI, L2) Coil -Oscillator coil(L3, L4) Coil -Vibrator choke coil(L10, L11)(Model 84BT6 only) Condenser -2 -gang variable tuning condenser (C2, C3, C4, C6) Connector -3 -contact female connector for speaker cable Cord -Power cord co

31、mplete with fuse and clips (Model 84BT6 only) Core -Adjustable core and stud forfirstor secondI -F transformers Dial -Station selector dial and holder assembly Ferrule -Fuse connectorferruleandbushing(Model 84BT6 only) Fuse- ampere (F1) (Model 84BT only) Fuse -5 ampere (F1) (Model 84BT6 only) Holder

32、 -Bias cell holder (2 cells)(Model 84BT6 only) Holder -Bias cell holder (1cell)(Model 84BT6 only) Indicator -Station selector indicator pointer Insulator -Fuse connector body insulator (Model 84BT6 only) Lamp -Dial lamp (Model 84BT only) Lamp -Dial lamp (Model 84BT6 only) Mounting -Vibratorsocketmou

33、nting comprising2 rubber washers, 2 screws, 2 eyelets, 2 washers 2 lock - washers, and 2 nuts (Model 84BT6 only) Reactor -Filter reactor (L13) (Model 84BT6 only) Resistor -330 ohms, carbon type,watt (R6) (Model 84BT6 only) Resistor -680 ohms,carbontype,watt(R8, R11, R12) (Model 84BT6 only) Resistor

34、-3,300ohms,carbontype, watt(R13) (Model 84BT6 only) Resistor -22,000 ohms, carbon type,watt (R2) Resistor -22,000 ohms, carbon type, 1/10 watt (R3) Resistor -33,000ohms,carbontype, watt(R1) (Model 84BT only) Resistor -68,000ohms,carbontype, watt(R1) (Model 84BT6 only) STOCK No. 5027 11398 11323 1117

35、2 3033 11628 13673 14315 14318 12008 14317 3682 14114 4794 4814 4786 14312 4787 4284 12007 14261 14283 14308 14311 14309 14282 14307 4285 14303 5118 9802 14304 14305 5118 9803 14306 14268 14269 14299 14298 14270 ADDITIONAL REPIACEIOINT PARTS - MODEL 848T 14827Drive-VernierDrive DESCRIPTION Resistor

36、-150,000ohms,carbontype,watt(R9) (Model 84BT only) Resistor -220,000 ohms, carbon type, 1/10 watt (R4) (Model 84BT only) Resistor -270,000 ohms, carbon type,watt (R9) Resistor -470,000 ohms, carbon type,watt (R10) Resistor -1 megohm, carbon type,watt (R8) (Model 84BT only) Resistor -2.2 megohms,carb

37、ontype,1watt(Model 84BT, R5) (Model 84BT6, R5, R7) Resistor -10 megohms, carbon type, 1 watt (R6) (Model 84BT only) Shield -Chassis end shield complete with bias cell holder -For end opposite vibrator (Model 84BT6 only) Shield -Chassis end and bottom shield for vibrator end of chassis (Model 84BT6 o

38、nly) Shield -First or secondI -F transformer shield can Shield -Vibrator shield can (Model 84BT6 only) Shield -1A4, 1F8, 6D8, or 75 Radiotron shield Socket -Dial lamp socket Socket -4 -contact 1A4 Radiotron socket (Model 84BT only) Socket -5 -contact 1F4 Radiotron socket (Model 84BT only) Socket -6

39、-contact106,1F6, 8D6,42,or 75Radio- tron socket Socket -6 -contact vibrator socket, less rubber mounting (Model 84BT6 only) Socket -7 -contact 6A7 Radiotron socket (Model blF T6 only) Spring -Fuse connector spring (Model 841316 or -.3 Spring -Retaining spring for core Stock No. 12006 Transformer -Fi

40、rst I -F transformer (L5, L6, C8, C9) Transformer -SecondI -Ftransformer(L7,I8,C11, C12, C13, R3, R4) (Model 84BT only) Transformer -SecondI -Ftransformer(L7,LB,C11, C12, C13, R4) (Model 84BT6 only) Transformer -Vibrator transformer (T2) (Model 84BT6 only) Vibrator complete (L12) (Model 84BT6 only)

41、Volume controland power switch(R7,Si) (Model 84BT only) Volumecontroland power switch(R4,Si) (Model 84BT6 only) Washer -Fuseconnectorinsulating washer(Model 84BT6 only) REPRODUCER ASSEMBLIES (76474-3) (Model 84BT only) Cone -Reproducer cone centered in metal housing com- plete with dust cap,less out

42、put transformer and plug (L9) Plug -3 -contact male plug for reproducer Reproducer complete Transformer -Output transformer (T1) REPRODUCER ASSEMBLIES (78494-2) (Model 84BT6 only) Cone -Reproducer cone complete with dust cap (L9) Plug -3 -contact male plug for reproducer Reproducer complete Transfor

43、mer -Output transformer (T1) MISCELLANEOUS ASSEMBLIES Crystal -Station selector crystal Knob -Station selector or volume control knob Resistor -0.68 ohm flexible wire wound ballast resistor (Model 84BT only) Screw -Chassis mounting screw and washer assembly Spring -Retaining spring for knob Stock No. 14269 On sore instrumente, speaker narked 78474-1 is employed. Replacement Pirts apply to this unit, 30236Cm* 8118Plug 30237T ran s fo rear Cone and duet cap (L9) 3 -contact sale plug Output transformer (TI) The following