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1、PACE 368-B MODELS 87K1, 87K2 8. 87T2 Seven -Tube, Three -Band, A -C, Superheterodyne Receiver Model 87K1 MODEL 87K2 Electrical SpeciRcations FREQUENCY RANGES Standard Broadcast (A) 540.1,720 kc Medium Wave (B) 2,300.7,500 kc Short Wave (C) 7,500,22,000 kc Intermediate Frequency RADIOTRON COMPLEMENT
2、(1) RCA,6A8 First Detector-Oscillator (2) RCA -6K7 Intermediate Amplifier (3) RCA,6H6 Second Detector and A.V.C. Pilot Lamps (3) . Mazda No. 46, 6.3 volts, 0.25 ampere 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. . 105,1
3、25/200-250 volts, 50.60 cycles, 80 watts MODEL 87T2 R -F ALIGNMENT FREQUENCIES Medium Wave (B)6,000 kc (osc., ant.) Short Wave (C)20,000 kc (osc.) Standard Broadcast (A). 600 kc (osc ), 1,500 kc (osc.) 460 kc (4) RCA -6F5Audio Voltage Amplifier (5) RCA -6F6Audio Power Amplifier (6) RCA -5W4Full -Wav
4、e Rectifier (7) RCA -6U5Tuning Tube LOUDSPEAKER TypeElectrodynamic Impedance (v.c.)2.2 ohms at 400 cycles POWER OUTPUT Undistorted2.5 watts Maximum4.5 watts II(-16V.) I(130V.) 243V.-0.5V. i 60V. 255V 6.;FF0 -0.2V. -, 6.3V. Lr A.c. -6F6C.G. 190V. A.C. OUTPUT - 339V. - TO TUNING TUBER -1I 350V. A.C. R
5、ECT 5W4 RED - SLACK 350V A.C. SOk A.G. _II 339V. TERM. 1 BRD. AUDIO 6F5 ELEcT.CAP REDBLACK C25C21,C25 BROWN C23 C22 CATHODE RAY 05CiLLOORAPHIYERTICAL,1 TO THISTEMM ELECT cOHNacTioNSYEAliCAL-0 TO CHASSIS SAP (C24 /-3V. BROwN- SLAGPl I 2. DEC , C.G. 255V. I 6.3V. A.C.,F4 A.V. 6 C H6 C:- faffL Iu5., BL
6、ACK I 4:4 C I- - -1 6.3V. GREEN -BLACK I IA.C. Iz. tI TRANS P1101.40. TERM-3V. 1-3V. 1 I95V. BRO. 1(- o. 3 v. ) 1 (-0.3V.*)- I .F 1-0.2V.1 -0.1V. I255V. 6K I IItItt P 84151-0 190V. 1-6411.-1 .05V. C.G. ,)255V. - ITT DET. OSC. BAR -95V.- -11V.- 1.13 1 . 460HCI 01ADJ. It I.F. TRANS. 1 BOTTOM VIEW- REA
7、R OF CHASSIS -Radiotron Socket Voltages and Trimmer Locations Measured at 115 volts, 60 -cycle supply - No signal being received- -Tuned to approximately 1,000 kc (Standard Broadcast)- -Volume control minimum-Tone control optional Note: Two voltage values are shown for some read- ings. The value sho
8、wn in parentheses with asterisk (*) indicates operating conditions without voltmeter loading. 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. TERM. BRO. C3 - CONNECT LINN TO TERN/ 2-8 IF INTERFERONCE FROM STRONG *OM LOCRL81011r7-4V6 soorao, LIC
9、MOVABLE SEGMENTS cOl 150 (moron) VW C 2 / I I 0015 CI 400 NNW L L3 -0.25o. L4 -4.4A L 5 -40A A Ira 0 0 5 RI C3 5C!L 50E R2 5800042, 0 bb O I, DET 40SC 6 AB / I F AMP i CO I li-490 1 6K7 TromF I i / IA , r LIA /1.441:5,4) I 1 ITD C71C0 .#.-1:.I.,socy rTm/m0, 0 83 33000o. MFT. 0) L2 IIEL L/5 1-16 7 r
10、pTh m040. 180 MO, OPEN ZINN 2. DET4A.V.0 I. R I I 6F5 IC IT 0,UFT I PUT 6 16 32 I,7-0R, AUDIO 4 C/3 I I I VOL. COR I .40I. I 11TO , A 7 M I C .01 /KO I 2,4E4 20 I ,.2.,OTAL POW -.- 2 M 500,00001 SECDON S I V 0 RS 2 26,0000 220000,v /40Di0.25 514 RE 16010 AO . 5,5 MFD III VC TONE CORER. RI, 390100 51
11、9 .005 REED T2 RED-,ACM 7 ,1 LB RED NOM NWT / COIL BLAcx A RAND 534 1145 RANGE 510EC TOR SHOWN N. -ELECTRIC TUNING POSITION, ROTATE I( NOB CLOCNN,SE FOR a; -B; 4c- B No51 /5 Li Co C42 o-YAINIE 0.3A .03A 032 . 62000 NNE L/ 0.6 9 c 31 2.,. 4 14. a %, L12C30 . 500 VFW ./ 35o. C5./ 3-.30 NMf. MOVABLE SE
12、GMENTS (ROTOR I 52 154 c S 1S6 C 35- 36 120-470 1.818T 157.513 159 537-35 65-280 067E ROTE.-54 - 510 SwITY,K5 AKRATE5 5 - 5,1 ;ROAMS 015 TIN ,11 BY DOTTED LINE. S - 5 III C 9-40 3o-100 MMF C 20 alNM 013 72 REA 025 V R,4 NEG. 15 10000-R 6U5 TONING 6 TUBE 3I- 5/5 13.30-25. O SWITCN PROGRESSES rfils OR
13、RECTaRi. syc27 .01 NCO C50 100 MME. A BAND k511 1512 15 /3 15 / 4 11515 ,1L20 AV .352t. 3523 3L24,5 25 : : /o l0 li . g kg i 2; 3 ,e7 - , * 7 / 3.8.3.70 RED SPEAKER RESISTANCES TYPELITLIE TO PRI.52 SEC eergooll 4.40.165200.31 664400r-62 4.50.227000.5 70E-11.13 0.13760.26 RECT 5W4 T c -GREEN GREEN II
14、I06-ZT BROWN 0001104 BROWN- INACOI BLUE ToATERS ,CNAL LAMPS 5231 /OM, POWER SWITCH (Mow. Teo ON RI SHAFT) FIELD LIS c22 129001 C24 /6,4FD. C25 7 ,0 MEDI :20or 4/6 220n 19 11000-o. Et i7 RIO 27L22 .A. V C26 0.1 offo. ELECTRIC TUNING NOICATOR LANAI 21 SIG RANGE5ELEcTOR -Schematic Circuit Diagram R19 w
15、as 18,000 ohms on some instruments. Replace with Stock No. 13477, 27,000 ohms. PreCautionary Lead Dress.-Maintain original length and size of the following: (1)allleads from range selector to antenna and oscillator coils;(2) lead from oscillator coil to ground; (3) leads from gang condenser to range
16、 selector. (4) Keep filament leads twisted and dressedaway from 6F5 grid lead.(5) Keep leads from C2 as short as possible. 7-70841-4 收音机爱 好者资料库 RadioFans.CN PAGE 370-B 87K1, 87K2 ) 0 0 RRNGE /RANGE 7/0-15505CV 54CI-1160KC RRNGE 500 126050 I.F. AtvlP0i51,000, T.F LI4 iS SSC RELI-T 46C TRANS COT 05C 1
17、50050 6K1 7T;145. 6F5 5 OUTPUT OCT A.VC_ IOC R14 3RECT L16 SEC RDJ 6,00k-G0e5.0PHONO TERM 4G,L25I. Z5L8 13RD FIRNGE -G4 2.-RRNG -moisso5c PUSH-BUVON 050 RDJ34o itc,E-050 LI2 -.051:0)301- 05C. 6.005C Le4LOSL20 BOTTOM 2-DGE -RERR 05 CHR5515 -Radiotron, Component Part, and Trimmer Locations Radiotron C
18、athode Current Readings Measured with Milliammeter Connected at Tube Socket Cathode Terminals Under Conditions Similar to Those of Voltage Measurements (1) RCA -6A8 -1st Det.-Osc. 12ma. (2) RCA,6K7-I-F Amp. 8ma. (3) RCA,6H6-2nd Det.-A.V.C. - ma. (4) RCA-6F5-AF Amp. 0.2 ma. (5) RCA-6F6-Output 41ma. (
19、6) RCA-5W4-Rectifier 63ma.* (7) RCA-6U5-Tuning Tube 1.6 ma. (*Cannot be measured at socket) C31 BLUE O TO ELECTRIC TUNING INDICATOR C42 S C29 RANGE .5ELFCTO BLUE - RED BLACKKBLACK 03 COO- 0. TELLOW ,kJ11 ) R -F Wiring Diagram Alignment Procedure Calibrate the tuning dial by adjusting dial pointer to
20、 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. CJ GREEN Order of Align- meet Test Oscillator Range Selector Receiver Dial Setting Circuit to Adjust Adjustment Symbols Adjust to Obt
21、ain Connection to Receiver Dummy Antenna Frequency Setting 1 6K7 I -F Grid Cap .001 Mfd.460 kc Standard Broadcast No Signal 550-750 kc tad I -F Trans. L15 and L16Max. (peak) 2 6A8 Det. Grid Cap .001 Mfd.460 kc Standard Broadcast No Signal 550-750 kc 1st I -F Trans. L13 and L14Max. (peak) Ant. Term.
22、A300 Ohms6,000 kc Wave 6 mc6B Osc.C31 Max. (peak) 4Ant. Term. A300 Ohms6,000 kc Wavem 6 mcB Ant.C3Max. (peak) 5Ant. Term. A300 Ohms20,000 kc Short Wave 20 mcC Osc.042 Max. (peak)* 6Ant. Term. A200 Mmfd. 600 kc Broadcast,Standard 600 kc L -FA Osc. L12Max. (peak) 7Ant. Term. A 200 Mmfd.1,500 kc Standa
23、rd Broadcast 1,500 kc Osc. A H -F C29Max. (peak) 8Ant. Term. A200 Mmfd. 600 kc Standard Broadcast 600 kc Osc. A L -F L12Max. (peak) 9Ant. Term. A200 Mmfd. 1,500 kc BSrotaandcdaasql, kc A H -F Osc. C29Max. (peak) * Use maximum capacity peak if two peaks can be obtained. 收音机爱 好者资料库 RadioFans.CN PAGE 3
24、7i -B 87K1, 87K2 Th insulated, 4 watt (R4, R13) 30750Capacitor -Dual trimmer,30-180Mmfd. eachsection 30760Shaft -Tuning knob shalt and pulley (C39, C40) 5119Socket -3 -contact socket for speaker cable 12723Capacitor -56 Mmfd. (C6) 13871Socket -6 -contact tuning tube socket 30764Capacitor -Dual trimm
25、er,65-280Mmfd. eachsection 11196Socket -8 -contact Radiotron socket (C37, C38) 14114Socket -Dial lamp socket -open type 30769Capacitor -100 Mmfd. (C28) 14171Socket -Dial lamp socket -shell type 14262Capacitor -110 Mmfd. (C7, C8) 30756Spring -Band indicator tension spring 12404Capacitor -120 Mmfd. (C
26、9, C10) 14342Spring -Idler pulley tension spring 12724Capacitor -120 Mmfd. (C16) 30585Spring -Indicator cord tension spring 30765Capacitor -Dual trimmer, 120-470 Mmfd. each section 30742Switch -Range switch (S1, S2, S16) (C35, C36) 30744Switch -Tuning push button switch(S4,S5,SO,S7, 12725Capacitor -
27、150 Mmfd. (C41) S8, S9, S10, S11, S12, S13, S14, S15) 12406Capacitor -180 Mmfd. (C12) 14376Transformer -First I.F. transformer (L13, L14, C7, C8) 12952Capacitor -330 Mmfd. (C5) 14283Transformer -Second I.F. transformer (L16, L16, C9, 30768Capacitor -500 Mmfd. (C30) C10, C12, R5, R6) 30767Capacitor -
28、2,000 Mmfd. (C32) 30607Transformer -Power transformer 105-125 volts and 200- 30303Capacitor -.0035 Mfd. (C2) 240 volts, 50-60 cycle (T1) 4838Capacitor -.005 Mfd. (C18, C19) 30571Transformer -Power transformer105-125volts,25-60 14393Capacitor -.01 Mfd. (C13, C15, C17, C27) cycle (T1) 4870Capacitor -.
29、025 Mfd. (C21) 13838Trap -Wave trap (L2, C1) 4839Capacitor -0.1 Mfd. (C11, C20, C26) 12484Capacitor -0.25 Mfd. (C14) MODELS 87K1 L 87K2 11203 30577 Capacitor -10 Mfd. (C25) Capacitor -Comprising two sections each :0 Mfd. (C22, REPRODUCER ASSEMBLIES C23) 13866Cap -Dust cap for cone center 5212Capacit
30、or -16 Mfd. (C24) 14354Coil -Field coil (L19) 30745Coil -Antenna coil and shield A, B, and C bands (L1, 11469Coil -Hum neutralizing coil (L16) L3, L4, L5) 12667Cone -Reproducer cone and dust cap (L17) 30747Coil -Oscillator coil A band (L20 or L21) 5118Plug -3 -contact male plug for reproducer 30748C
31、oil -Oscillator coil A band (L22 or L23) 14395Reproducer -complete 30749Coil -Oscillator coil A band (L24 or L25) 14358Screw -Screw, washer and lockwasher to hold core in yoke 30746Coil -Oscillator coil A, B, C bands (L6, L7, L8, L9, 14355Transformer -Output transformer (T2) L10, L11, L12) 14357Wash
32、er -Spring washer to hold field coil 30740 30743 Condenser -2 -gang variable tuning condenser (C3,C4, C34) Control -Volume control, tone control, and power switch MISCELLANEOUS ASSEMBLIES in one unit (R7, R11, S3) 30778Button -Automatic station selector push button 30763Cord -Indicator drive cord 30
33、780Cushion -Rubber cushion for automatic station selector 30759Dial -Station selector dial scale button 30753 Disc -Band indicator disc with colored segment 30774Escutcheon -Stationselectorescutcheoncomplete with 30741 Drive -Variable condenser vernier drive shaft and pinion side panels and buttons
34、gear 30775Escutcheon -Stationselectorescutcheoncentersection 30587 Drum -Drive belt drum -fastens on variable condenser only -less side panels and blittons vernier drive shaft 30776Eicutcheon-Station selector escutcheonright andleft 30761 Drum -Indicator cord drum -fastens onvariablecon- hand sectio
35、ns only denser rotor shaft 30773Knob -Volume control knob 14341Idler -Drive idler pulley, bracket and spring 14269Knob -Range switch knob 30762 Indicator -Indicator pointer and slider 14359Knob -Station selector knob 5226Lamp -Dial lamp 30772Knob -Tone control and power switch knob 30757Pulley -Larg
36、e size pulley for indicator cord -located at 11210Screw -Chassis mounting screw and washer assembly top left corner of dial bracket 30779Shield -Celluloid shield for call letter cards 30758Pulley -Medium size pulley for indicator cord -located at top right side of dial bracket 30777Shield -Finished
37、metal shield and screws for automatic station selector button panel 14897Pulley -Small size pulley for indicator cord -located at 30330Spring -Retaining spring for knob Stock No. 30772 top right hand corner of dial bracket 14270 Spring -Retaining spring for knobs Stock Nos. 30773 14525Resistor -22 o
38、hms, carbon type, * watt (R18) and 14269 11955Resistor -27 ohms, carbon type, 4 watt (R17)4982 Spring -Retaining spring for knob Stock No. 14359 30771Resistor -50 ohms, flexible type, 24 watts (R1) ADDITIONAL REPLACEMENT PARTS Stock No. MODEL 87T2 REPRODUCER ASSEMBLIES 30695cora - Station call lette
39、r oard 30846Core - Adjustable oar* and stud for A band oscillator soils 15477Resistor 27,000 oha, carbon typo, 1 watt (R19) 12007Spring - Retaining spring for Gore Stook 00846 14614 Cone -Reproducer cone and dust cap (L17) (for speaker marked 84091-1 or 84001-3) 14934 Cone -Reproducer cone and dust
40、cap (L17) (for speaker marked 84091-2 or 84001-6) 5118Plug-3-contact male plug for reproducer 14613 Reproducer complete (marked 84001-3 or 84001-6 but interchangeable with speaker marked 84091-1 or 84091-2 respectively) 14615 Transformer -Output transformer (T2) (for speaker marked 84091-1 or 84001-3) 14935Transformer -Output transformer (T2) (for speaker marked 84091-2 or 84001-6)
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