RCA-Victor-Co-Inc-7T1 电路原理图.pdf

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1、PAGE 77-B MODELS 6K3, 7K18. 7T1 Six- and Seven -Tube, Three -Band, A -C, Superheterodyne Receivers FREQUENCY RANGES Standard Broadcast- (A) Medium Wave (B) Short Wave (C) Intermediate Frequency Electrical Specifications 540- 1,625 kc 1,625- 5,700 kc ALIGNMENT FREQUENCIES Standard Broadcast (A) Mediu

2、m Wave (B) 5,700-18,000 kc Short Wave (C) RA DIOTRON COMPLEMENT (1) RCA -6A8FirstDetectorOscillator (2) RCA -6K7IntermediateAmplifier (3) RCA -6H6SecondDetector-A.V.C. liode/ 7Y 600 kc (osc.), 1,400 kc (osc. and ant.) None required 15,000 kc (osc. and ant.) 460 kc (4) RCA -6F5Audio Voltage Amplifier

3、 (5) RCA -6F6Audio Power Amplifier (6) RCA -5W4Full -Wave Rectifier (7) RCA-6G5-(Models 7T1 and 7K1 only) Tuning Tube Pilot Lamps (5) 7T1 and 7K1, Mazda No. 40, 6.3 volts, 0.15 amp.; 6K3, Mazda No. 46, 6.3 volts, 0.25 amp. POWER SUPPLY RATINGS Rating A 105.125 volts, 50.60 cycles, Rating B 105.125 v

4、olts, 25.60 cycles, Rating C 100.130/140-160/195-250 volts, 40.60 cycles, POWER OUTPUT Undistorted2.0 watts Maximum4.5 watts Radiotron Cathode Current Readings Measured with Milliammeter Connected at Tube Socket Cathode Terminals Under Conditions Similar to Those of Voltage Measurements (1) RCA -6A8

5、 -1st Det.-Osc12.3 ma. (2) RCA -6K7 -1-F Amp9.8 ma. (3) RCA -6H6 -2nd Det. and A.V.C. (4) RCA -615 -Audio Driver0.1 ma. (5) RCA-6F6-Power Amplifier34.0 ma. (6) RCA-5W4-Rectifier.76.0 ma.* (7) RCA-6G5-Tuning Tube2.0 ma. *Cannot be measured at socket. LOUDSPEAKER Type Impedance (v.c.)2.2 dhms at 400 c

6、ycles 90 watts 90 watts 90 watts Electrodynamic TUNING 4.7 14003C11K11:.I5,TOOKC. CS T1 6G5; ON.MODELS 7K14.11.1ONLY. 28514-. C.%,400M141? RI9 ,-/-/ I -14 22 41,COIL, 5 . ts, EL c7 MI STDET. 05C. L13 460KC ST.I.F. TRPKIS. (Ds SE ( C1:2122. 5602.000/L ADJ. L_(1617,111D LE 6K f 4E.OKC) 2 CI-WFIVE0-05C

7、.C12-0SC., 2.1.3 T RIR NS. OUTPUT RUDIO16F5 2.1.DET. 1tRIC 460 KC.1400 KC.60O KC.15,000 KG. Radiotron, Coil, and Trimmer Locations 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 LILR 22.1.34 RI 2204 MME CZ RANCE- SELECTOR SHOWN IN ST RNDORD DPORDC

8、PST POSITION a BAND INDICRTOR5 DET 4 OSC. Cfs I92n DR8 2 C14 500MME ,J1_13 L91- 10 c.30. 2.1%.In ANT. COIL CONNECTIONS ,r X LE RMPL. C.N7 OSC. COI 1. CONNECTIONS LINK CLOSED FOR R11010 oe-r.Aam. k MG I1 THAP0N1.06-.13 1D. 2.2 MEC. P20 r - - - + lI 2.2MEG ICE 1.05.4p -o 60- O., SI RIO 21000 _J TODIRt

9、 RRLTE111,5t.2) Schematic Circnit Diagram -RED GO, E. In 11.64 -RED1 B LUEL. 111.1.111. D ROWN ER, 416n DLACM- E MNOWN /GOA 11100ww TOREENRECT.GREEN BLACK POWER TRANSF. C24 .0141F3 mec SEC/-, I Ri 2 MEG. TOT RL VOLUME CONTROL RU010OUTPUT ME5 6F6C27 FEL D 0004 RECT. 5W4 1E0 242444 1.1.1.F.TRANS. CONN

10、ECTIONS RIT 1218 41.44/Vier. ITS.402. RIO 5500 iS 15.000 PIG 135. 2412/141114 TONE CONTROL O. 5, LIT LIB 0.12%. HUM HE -UT. CO L MRz =s5NoRmaL 144114. LOWS 132 0.25MER CEORE WO MAE NINE. 22.0,00ow Cu 111101212,40 TRANS. CONNECTIONS 收音机爱 好者资料库 RadioFans.CN PAGE 79-B 6K3, 7K1 A.C. 1710 V. c264V.a I OV

11、. I1 -0.3V. -3V. L 21 O D ET. G1107AN/C 0,V. A.C. 1 ON 71c1-7111 170 V.BR !NIN. SHIELD, GREEN (121.C. IC31 olv SOTTOM FRONT OF CHASSIS , BOv. TUNING TUBE (MEI ONLY (0.30* - 0.1V. 0 V. AUDIO 6F5 ! (-16 v) -0.5v. 265V. 355V. OV. A.G. RECT. 5w4 (4 Hoy 6.4V. 13A5.CV. EA.C.1 097j- 264V.- - OUTPUT 6F6 C50

12、 L340, P-7.01-1 -Radiotron Socket Voltages, Coil, and Trimmer Locations Measured at 115 volts, 60 -cycle supply-Tuned to approximately 1,000 kc (Standard broadcast)- No signal being received-Volume control minimum Note: Two voltage values are shown for some read- ings. The value shown in parentheses

13、 with asterisk (5) indicates operating conditions without voltmeter loading. Alignment Calibrate the tuning dial by adjusting dial pointer to the low -frequency (end) calibration mark on Standard broad cast scale with the gang tuning -condenser plates in full -mesh position.This is a friction adjust

14、ment. Connect the low output terminal of the test oscillator to the receiver chassis forall alignment operations. Regulate the output of the test oscillator so that minimum signalis applied to the receiver to obtain an observable output indi, cation. This will avoid a -v -c action. Procedure The ter

15、m Dummy antenna means the device which must be connected between the high test -oscillator output and the point of connection to the receiver in order to obtain ideal alignment.No signal, 550.750 kc means that the receiver should be tuned to a point between 550 and 750 kc where no signal or interfer

16、ence is received from a station or local (heterodyne) oscillator. Order of Align- ment Test Oscillator Receiver Dial Setting Circuit to Adjust Adjust - ment Symbols Adjust to Obtain Connec- tion to Receiver Dummy Antenna Frequency Setting 1 6K7 i-f Grid Cap .001 Mfd.460 kc No signal 550-750 kc 2nd.i

17、-fL14 Trans. and L15Max. (peak) 2 6A8 Det. Grid Cap .001 Mfd.460 kc No signal 550-750 kc 1st i-f Trans. L12 and L13Max. (peak) 3Ant. Post200 Mmfd. 460 kc No signal 550-750 kc Wave Trap Cl Minimum Output 4Ant. Post300 Ohms 15,000 kc15,000 kcC Osc. C8Max (peak)* 5Ant. Post300 Ohms 15,000 kc Rock thru

18、16,000 kc C Ant.C5 Max. (peak) 6Ant. Post200 Mmfd.600 kc 600 kcL -F Osc.C12 Max. (peak) 7Ant. Post 200 Mmfd.1,400 kc1,400 kc H -F Osc.C10 Max. (peak) aAnt. Post200 Mmfd. 1,400 kc1,400 kcA Ant. C3Max. (peak) 9Ant. Post200 Mmfd.800 kc Rock thru 600 kc L -F Osc.C12 Max. (peak) 10Ant. Post200 Mmfd. 1,40

19、0 kc1,400 kcH -F Osc. C10Max. (peak) 11Ant. Post200 Mmfd. 1,400 kc1,400 kcA Ant. C3Max. (peak) * Use maximum capacity peak if two peaks can be obtained. 收音机爱 好者资料库 RadioFans.CN PAGE 80-B 6K3, 7K1 & 7T1 LACK Burt FILAMENTS BA. FteE SECT Primary resi.tance-17.3 Ohms total Secondaryresistance -108 olin

20、is total Universal Transformer 3764 OUTPUT TRANSF. TI BROWN SLACK I BROW BLACK REPLACEMENT PARTS Loudspeaker Wiring Insist on genuine factory tested parts, which are readily identified and may be purchased from authorized dealers. STOCK No. DESCRIPTION ST NOCKo. DESCRIPTION RECEIVER ASSEMBLIES 12013

21、 Resistor -1 megohm-Carbon type -1/10 watt (R21)- Models 7T1 and 7K1 only 12930 Board -Antenna and ground terminal board 11626 Resistor -2.2 megohms - Carbon type - *watt(R6, 12717 Board -Phonograph terminal board R20) 12772 Bracket -Top dial lamp socket bracket 12008 Sh.eld-I. F. transformer shield

22、 for Stock Nos. 13106 5237 Bushing -Variable tuning condenser mounting bushing and 13107 assembly Cable 12607Shield -First I. F. transformer shield top 11888 12581 Shield -Second I. F. transformer shield top -Tuning tube cable and socket -Models 7T1 and 7K1 only 11603 Shield -Coil shield for Stock N

23、os. 11617 and 11618 Cap -Grid contact cap 12735Shield -Dial lamp shield 11350 Cap -Grid contact cap used on resistor -Stock No. 11624 12771 Socket -Dial lamp socket -Located at top of dial scale 11465 Capacitor -Adjustable capacitor (C12) 11199Socket -Dial lamp socket 11256 Capacitor -Adjustable tri

24、mmer (C1) 11195 Socket -5 -contact 5W4 Radiotron socket 12404 Capacitor -120 Mmfd. (C17, C18, C20, C21) 11198 Socket -7 -contact 6F5, 6H6 Radiotron socket 11289 Capacitor -50 Mmfd. (C9) 11196 Socket -8 -contact 6A8, 6F6 or 6K7 Radiotron socket 11623 Capacitor -175 Mmfd. (C26) 11381 Socket -Tuning tu

25、be socket and cover -Models 7T1 and 12406 Capacitor -180 Mmfd. (C22) 7K1 only . 11290 Capacitor -400 Mmfd. (C2, C6) 12007 Spring -Retaining spring for core, Stock No. 12006 11622 Capacitor -3000 Mmfd. (C13) 12769 Switch -Range switch (S2, S3) 11621 Capacitor -3800 Mmfd. (C11) 13681 Tone Control -Ton

26、e and power switch (S1, S4) 11287 Capacitor -4500 Mmfd. (C14) 13106Transformer -First I. F. transformer (L12, 1.13, C17, 4868 Capacitor -.005 Mfd. (C29) C18) 11395 Capacitor -.01 Mfd. (C24) 13107 Transformer -Second I. F. transformer (L14, L15, C20, 4858 Capacitor -.01 Mfd. (C25, C27) C21, C22, R5,

27、R7) 11315 Capacitor -.015 Mfd. (C33) 11458 Transformer -Power transformer - 105 -125 -volt,50-60- 11451 Capacitor -.017 Mfd. (C28) cycle (T1) 4836 Capacitor -.05 Mfd. (C34) -Models 7T1 and 7K1 only 11585 Transformer -Power transformer -105 -125 -volt,25-40- 4841 Capacitor -0.1 Mfd. (C19) cycle (T1)

28、11414 Capacitor -0.1 Mfd. (C15) 11584 Transformer -Power transformer -105 -250 -volt,40-60-5170 Capacitor -0.25 Mfd. (C32) cycle (T1) 11387 Capacitor -10 Mfd. (C16) 11391 Trap -Wave trap (L1, C1) 11240 Capacitor -10 Mfd. (C30) 13144 Volume Control (R11) 5212 Capacitor -18 Mfd. (C31) 11617 Coil -Ante

29、nna coil less shield (L2, L3, L4, L5, C3,R1) REPRODUCER ASSEMBLIES11618 Coil -Oscillator coil less shield (L6, L7, L8, L9, L10. L11, C10) 12641 Board -Reproducer terminal board 13597 Condenser -2 -gang variable tuning condenser (C4, C5, 12640 Bracket -Output transformer mounting bracket and clamp C7

30、, C8) 13600Coil -Field coil (L16) 5119 Connector -3 -contact female connector for speaker cable 11469 Coil -Neutralizing coil (L18) Cone (L17) -Model 7T1 12006 Core -Adjustable core and stud for Stock Nos. 1310612642 -Reproducer cone complete Cone -Reproducer cone complete (L17) -Models 6K3 and 1310

31、7 12667 13682 Dial -Station selector dial and 7K1 13598 Drive -Variable tuning condenser vernier drive 5118 Connector -3 -contact male connector for speaker cable 13599 Foot -Chassis mounting foot and bracket 9771 Reproducer complete -Model 7T1 12770 Holder -Dial scale holder and lamp bracket assemb

32、ly less 9766 Reproducer complete -Models 6K3 and 7K1 bracket for top dial lamp socket 11253Transformer -Output transformer (T2) 12712 Indicator -Station selector indicator pointer 11886 Washer -Spring washer to hold field coil securely 4340 Lamp -Dial lamp -Models 7T1 and 7K1 only 5226 Lamp -Dial la

33、mp -Model 6K3 only MISCELLANEOUS ASSEMBLIES13683 Mask -Dial light diffuser complete with colored screen 11466 Resistor -Voltage divider resistor -comprisingone 3,500- 12038Band -Rubber band for tuning tube ohm, one 13.000 -ohm, one 85 -ohm, one 40 -ohm and 13615 Bracket -Tuning tube mounting bracket

34、 and clamp one 175 -ohm sections (R14, R15, R16, R17, R18) 12698 Crystal -Station selector crystal and escutcheon 11624 Resistor -22 ohms -Flexible type complete withgrid 12742 Escutcheon -Tuning tube escutcheon contact cap (R19) 12699Knob -Large station selector knob 11620 Resistor -220 ohms -Carbo

35、n type -1/10 watt (R1) 12700 Knob -Small (vernier) station selector knob 8070 Resistor -22,000 ohms -Carbon type -1 watt (R4) 11347 Knob -Tone control, range switch or volume control knob 11400 Resistor -27,000 ohms -Carbon type -1 watt (R10) 11377 Screw -Chassis mounting screw assembly -Used on Mod

36、el 12286 Res,stor-56,000 ohms -Insulated -I watt (R3) 7T1 11282 Resistor -56.000 ohms -Carbon type -1/10watt (R5) 11210 Screw- Chassis mounting screw assembly- Used on 11398 Resistor -220,000 ohms -Carbon type -1/10 watt (R7) Models 6K3 and 7K1 11453 Resistor -270,000 ohms -Carbon type -1/10watt (R121 11349 Spring -Retaining spring for knob -Stock Nos. 11347 11452 Resistor -470,000 ohms -Carbon type -1/10watt (R13) and 12700 11397 Resistor -560,000 ohms -Carbon type -1/10watt (R2) 4982 Spring -Retaining spring for knob -Stock No. 12899