RCA-Victor-Co-Inc-8Q1 电路原理图.pdf

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1、PAGE 191-C MODEL 801 Eight -Tube, Three -Band, Superheterodyne Receiver Chassis No. RC -337 FREQUENCY RANGES Standard Broadcast (A Band).530.1720 INTERMEDIATE FREQUENCY RADIOTRON COMPLEMENT (1) RCA -6K7 R -F Amplifier ( 2 ) RCA -6L7 1st -Detector (3) RCA -6J7 Oscillator (4) RCA -6K7 I -F Amplifier (

2、 5) RCA -6Q7 2nd-Det., A.V.C., and Audio Pilot Lamps (2) POWER OUTPUT RATING Undistorted 2.5 watts Maximum 4.5 watts POWER SUPPLY RATINGS A -C Ratings With PSU 8A Power Supply Unit With PSU 8B Power Supply Unit With PSU 8C Power Supply Unit Electrical Specifications Medium Wave (B Band) kc (566-174

3、m) Short Wave (C Band) 2 3-7.0 mc (130-42,8 m) 7 022 mc (42.8-13.6 m) 455 kc (6) RCA -6F6 -G Power Output ( 7 ) RCA -6U5 Tuning Indicator (8) RCA -5Y3 -G. (In PSU 8A, 8B, 8C AC power supply unit) Rectifier ( 8 ) RCA -5W4 (In PSU 8E D -C power supply unit) Rectifier . Mazda No. 44, 6.3 volts, 0.25 am

4、p. LOUDSPEAKER (RL -63H-3) Type 8 -inch Electrodynamic Voice -coil Impedance at 400 ohms 2.2 ohms Volts Cycles 105.125 50-60 105-125 25.60 105-130, 140.160, 50.60 200-225, 225-250 D -C Ratings With PSU 8E Power Supply Unit 105-125, 210.250 D -C 2 7 STOCK 99 8820 .-T RM. BOARD SWITCH REAR OF CNA5515

5、(REAR VIEW) PHONO POSITION TAPE RED It /SHIELD BLUE rigid GREEN reu 11212111 K -a8107 TO RECORD PLAYER Record Player Connections, Using a No. 9824 Switch SWITCH POSITIONS PHONO RADIO SWITCH H PHONO BOARD ON REAR OP CHASSIS -SHIELDED CABLE - V50, 000 H- OLME CONTROL CRYSTAL OR NIGH PHONO MOTOR _IMPED

6、ANCE MAG - AND TURNTABLE NETIC PICKUP Record Player Connections, Using a Double -Pole, Double -Throw Toggle Switch SPEAKER PLUG CONNECTIONS 501 PULLEY 31373 RANGE SWITCH PULLEY 31272 PULLEY 31373 CABLE DRIVE REAR GROOVE OF CRUM DRUM DRIVE CORD 31786 . NT GROOVE Or DRUM -PULLEY 31788 TWO -SPEED DRIVE

7、 I BRACKET 31787 DRUM SHOWN WITH GANG AT MAXIMUM CAPACITY H-417299 RC- 137A,317E, n? Connections of Loudspeaker and Cable Arrangement of Drive Cords for Tuning Condenser and Dial Indicator RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. 1., U. S. A. 收音机爱 好者资料库 RadioFans.CN PACE 192-C

8、Q l o o Z -P Z OJ o O WmP + t0000P I o n W o hW 收音机爱 好者资料库 RadioFans.CN PAGE 193-C 8Q1 u J WO vT W u m m OF F- O - 1 WZ J- dD 1 mj N as N d u J a K 1-Q u0 m N cai a LE 2 u F r Nt O 4LL om 0 6 , . Q O xZ I rn v1 mm tl J N . o I I T-2 9 . u F _ t,% 2.- 9 , - . W t) F. N % -N 2d19 Y F O V N Jw to re .

9、-K 8 r =O Y H V = Q m 3 p - ta te. f-.- m .L II! u p -1n Ily L K N tJ d OWN Ol d N - J O to K Ei M b Q G 7 VI mH . J oz, u a o, 7 O j N W n 3 E Q R2 mV , F- r J (O2-p m m cr nP e . , , , Li h0 1 te -2 ( ep m N Y ! m V) 1 sne cn- 1 ,L O - . dTN NH, 9 sac = J . I O a - . N 1- s . J i _- % si l 1 I QI

10、am J-i V . d . u JF m Y_jz o oai -o m I d ei m e. L ti 3 u d G t W U m H 3 i , iJ 3 3 J O LL W li 111 Y .1) 3 O 7L- 73 ,- d L .0 h w tl / n .i w K e- a = F 3 p Y V ,_, O Y 0 d ,Qpn 0. n It ii R1d1 H CO ir N U Ll J m 3 m O _ U OO! N J d .G. w-, co io m _ J ; on 0 J e O o m w + ;QQ 11e B C L 19- 0i jO

11、 1 O 1 O W wi Q O 0 I o 1- _ J. JJJ Q J O COj a cW a J O rem K W u i tone position. To switch off the set, turn this knob fully POWER counter -clockwise. s ONF Qi. CONTROL P 6 4,y ON -TONE RANGE SELECTOR e soFT TUN 841 NG VOLUME CONTRO Louoclockwise, L Steps Connect the high side of test-osc. to- Tu

12、ne test- osc. to- Turn radio dial to- Adjust the following for max. peak output 6K7 I -F grid cap, in series with .01 mfd. C band, Quiet L14 and L15 (2nd I -F Trans.) 2 6L7 lst-Det. grid cap, in series with .01 mfd. 455 kc Point. L12 and L13 (1st I -F Trans.) Antenna Terminal, in series with 300 ohm

13、s 6.1 me 6.1 me (29) B band C8 (osc.)* C14 (det.)* C3 (ant.) 3A Check to determine that C8 has where a weaker signal should be been adjusted to received. the correct peak by turning radio to 5.19 me (50) 4 Antenna Terminal, in series with 300 ohms 20 me 20 me (23.5) C band C5 (osc.)* 4A Check to det

14、ermine that C5 has been adjusted to where a weaker signal should be received. the correct peak by turning radio to 19.09 me (29.5) 5 Antenna Terminal, in series with 200 mmf. 1 ,500 kc 1,500 kc (31) A band C40 (osc.) 6 Antenna Terminal, in series with 200 mmf. 600 kc 600 kc (144.5 ) A band L7 (osc.)

15、t 7 Repeat Step No. 5 * Use minimum capacity peak (plunger out) if two peaks can be obtained. * Rock gang condenser slightly while peaking C14, and use maximum capacity peak if two peaks can be obtained. t Rock gang condenser slightly while peaking L7 for maximum output. NOTE: The oscillator tracks

16、455 kc above the signal on all bands. PAGE 195-C Calibration Scale II I I I II I I I I i ll I I!ll 111 1 1 1 ll 1 1 1111111111111111111!III I I II111111111111lII I I I111111111111111111111111111(1111111111111111111111I11111111111111111111111111111111111111111111111111111 180 170 160 150 140 130 120

17、110 100 90 80 70 60 50 40 30 20 10 0 891 T C MC 7 MEXICO CITY - SP TLD - BUENOS AIRES BERLIN - TOKYO -PITIS GH BERLIN -PITTSBURGH BERLIN -LONDON BERLIN - NEW YORK LONDON -BERLIN - PHILADELPHIA -ROME LONDON -ROME - PARIS LONDON- SCHEN Y NEW YORK LONDON -PITTSBURGH HAVANA- SCHENI -MOSCOW 31M HUIZEN 25

18、M PRAGUE LIMA 19M PARIS 16M 13M 8 q p 14 16 18 20 MC C , R 1 1 A KC 550 500 M 400 M 300M 250 M . . . . . . . . . . . . . . . . , . . , . . 1 1 600 700 800 1000 1200 1400 200 M 1700 A K C j B MC 2.5 120M 1 1 3.0 100 M 4.0 75M 5.0 62M COLOMBIA (S. AMERICA( 6.0 MC B HAVANA 49M BOSTON - TORONTO - N. YOR

19、K BOGOTA - MEXICO CITY - CINCINNATI - PITTSBURGH BERLIN - PANAMA CITY. - CHICAGO - CARACAS 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Receiver Dial Scales. and Correspondina 0-180 Calibration. Scales REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily i

20、dentified and may be purchased from authorized dealers. STOCK DESCRIPTION S No. K DESCRIPTION RECEIVER ASSEMBLIES (RC337) 13204 Resistor -8,200 ohms, 2 watt (R13) 13302 Resistor -10,000 ohms, 1/10 watt (R21) 13218 Board -Antenna and ground terminal board. 13045 Resistor -18,000 ohms, i watt (R7) 127

21、17 Board -Phonograph input terminal board 14167 Resistor -27,000 ohms, 2 watt (R22) 31303 Bracket -Band indicator mounting bracket -less 11300 Resistor -33,000 ohms, 1/10 watt (R4) . ,. indicating strip, spring, and cord Cable drive 12719 Resistor -82,000 ohms, 1/10 watt (R20) 31785 14560 Resistor -

22、100,000 ohms, watt (R11, R12) -Indicator pointer cable Cap -Rubber cap for Magic Eye 30766 11398 Resistor -220,000 ohms, 1/10 watt (j 10) . 12714 Capacitor -Trimmer 2-12 mmfd. (C3, C5, C8, 12199 Resistor -270,000 ohms, watt R18 C14, C40) 13005 Resistor -390,000 ohms, 1/10 watt (R19). 14392 Capacitor

23、 -4.7 mmfd. (C39) 12013 Resistor -1 meg., 1/10 watt (R1, R2, R5). 13200 Capacitor -10 mmfd. (C7, C18) 5131 Resistor -2.2 meg., 1/10 watt (R6) 31791 Capacitor -16 mmfd. (C2) 14887 Retainer -Indicator drive cord pulley retainer. 31270 Capacitor -1G0 mmfd. (C22, C23, C26, C27) 4669 Screw -No. 8-32 x g

24、-in. square head set screw 12724 Capacitor -120 mmfd. (C20, C33) for pulley, Stock Nos. 31272 and 31788, and 13003 Capacitor -180 mmfd. (C28) drum, Stock No. 31808 12894 Capacitor -220 mmfd. (C12) 31364 Socket -Dial lamp socket 12952 Capacitor -330 mmfd. (Cl, C15) 13871 Socket -Magic Eye socket 3179

25、0 Capacitor -530 mmfd. (C10) 31251 Socket -Octal base tube socket 31792 Capacitor -4,000 mmfd. (C41) 31279 Spring -Band indicator tension .spring 31405 Capacitor -8,000 mmfd. (C17) 13638 Spring -Tension spring for pointer drive cable, 4838 Capacitor -.005 mfd. (C34, C37) or variable condenser drive

26、cord 14393 Capacitor -.01 mfd. (C29, C35) 31775 Switch -Range switch (S1, S2, S3, S4) 4870 Capacitor -.025 mfd. (C30) 31807 Tone Control and power switch (R17, S5, S6). 4886 Capacitor -.05 mfd. (C24) 31267 Transformer -First i -f transformer (L12, L13, 4839 Capacitor -0.1 mfd. (C11, C16) C22, C23) 1

27、2484 Capacitor -0.25 mfd. (C25, C31, C38) 31268 Transformer -Second i -f transformer (L14, L15, 5212 Capacitor -16 mfd. (C32) C26, C27) 31818 Clip -Magic Eye mounting clip 31450 Volume Control (R9) 31780 Cod -Antenna coil (L1, L2, LS, L4) 31782 Coil -Oscillator coil -A band only (L7) SPEAKER ASSEMBL

28、IES (RL83H-3) 31783 Coil -Oscillator coil -B and C bands only (L5, L6) 31825 Cap -Speaker cone center dust cap 31781 31774 Coil -R -f coil (L8, L9, L10, L11) Condenser -3 -gang variable tuning condenser 11469 12012 Coil -Hum Coil-SneakereUfield neutralizing coil c(L18) (C4, C13, C19) 31310 Cone -Spe

29、aker cone and voice coil (L16) 31278 Cord -Band indicator cord 31302 Plug -4 -contact male plug for speaker 31786 Cord -Variable condenser drive cord 31824 Speaker complete 31787 31808 Drive -Two -speed drive and mounting bracket. Drum -Variable condenser drive cord drum. 14355 Transformer -Output t

30、ransformer (TI) 31304 Indicator -Band indicator strip 11891 Lamp -Dial lamp MISCELLANEOUS ASSEMBLIES 31817 Plate -Cushion socket mounting plate - less socket 31800 Dial -Dial scale and crystal 5040 Plug -4 -contact female plug for speaker cable. 31831 Escutcheon -Dial scale escutcheon - leas dial 14

31、404 Plug -7 -contact male plug for power input. scale and crystal 31788 Pulley -Two -speed drive pulley 3180-1 Indicator -Indicator pointer and carriage 31280 Pulley -Indicator pointer drive cord pulley (large) 31802 Knob -Station selector, tone control, volume con - trot or range switch knob 31373

32、Pulley -Indicator pointer drive cord pulley 31287 Rod -Pointer carriage alide rod (small) 31306 Screen -Dial color screen and light diffuser. 31272 Pulley -Range switch pulley 14270 Spring -Retaining spring for knob Stock No. 14880 Resistor -18 ohms, watt (R15) 31802 14526 Resistor -200 ohms, wire w

33、ound, 24- watt (R18) 31558 Spring -Stop spring for pointer slide rod PAGE 211-C PSU 8A, 8B, 8C, 10A, 10B and 10C A -C Power Supply Units General Description Certain models of the Q Line of RCA Victor Magic Brain 1938 radio receivers are designed for use with a sepa- rate plug-in power supply unit. D

34、ifferent units are available to permit operation on a -c power supplies of various voltages and cycles, and also on 110 or 220 volts d -c. Service data and diagrams for the a -c units are contained in this sheet: The d -c units are described in a separate sheet. Each a -c unit is equipped with an 18

35、 -inch 6 -wire cable with a 7 -contact female receptacle which plugs into a 7 -prong male connector on the receiver chassis. The a -c power cord is 6 feet long. The units are approximately 71/2 inches long, 41/4 inches wide, and 6 inches high. Testing.-To check an a -c power unit when a receiver is

36、not available, connect a 50 -watt resistor (4,800 ohms for PSU 8A, 8B, 8C, and 3,450 ohms for PSU 10A, 10B and 10C) across contacts 2 and 6 on the power receptacle. Connect a jumper across contacts 4 and 5. Measure the d -c voltage across the resistor, which should be approximately 375 volts, with 1

37、17 volts supply on the 117 -volt tap. Specifications TyPeRadiotron Rating g Rectifier D -C Output Heater (A -C) Used with Models D -C Resis., Ti Net Weight (pounds) Voltage Cycles Pri. ohms Total Sec. ohms Total PSU SA 105-125 50/60 5Y3 -G 375 volts at 78 milliamps 6.45 V 3 amps 8Q1 and 8Q4 6.4 535

38、7 PSU 8B 105-125 25/60 8.3 705 9 PSU 8C .Universal* 50/60 17.4 455 11 PSU l0A 105-125 50/60 5U4 -G 380 volts at 110 milliamps 6.36 V 5 amps lOQl, 12Q 12Q4, 12Q U* 3.0 250 9 PSU 10B 105-125 25/60 3.9 250 13 PSU lOC Universal* 50/60 8.9 190 15 * The universal can be set for 105-117, 117-130, 140-160,

39、200-225, or 225-250 volt supply. * Model 12QU has a phonograph motor designed for 50/60 cycle operation only, and uses either PSU 10A, or IOC. REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers. STIOoCK DESCRIPTION STO

40、CK DESCRIPTION 11203 14531 14409 51251 31733 31736 Cable -8 -conductor power output cable with plug Capacitor -10 mfd. (Cl) (PSU 8A, 8B or 8C only) Capacitor -25 mfd. (C1) (PSU 10A, 10B or lOC only) Plug -7 -contact plug for power output cable Socket-Rectifier tube socket Transformer-Power transform

41、er 105-125 volts, 50-60 cycle (T1) (PSU SA only) Transformer-Power transformer 105-125 volts, 50-60 cycle (T1) (PSU l0A only) 31734 31737 31735 31738 Transformer-Power transformer 105-125 volts, 25-80 cycle (T1) (PSU 8B only) Transformer-Power transformer 105-125 volts, 25-60 cycle (T1) (PSU 10B onl

42、y) Transformer-Power transformer 105-130, 140- 180, 200-250 volts, 50-60 cycle (Ti) (PSU 8C only) Transformer-Power transformer, 105-130, 140- 160, 200-250 volts, 50-60 cycle (T1) (PSU 10C only) RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. PAGE 2i2-C PSU 8A, -B, -C, IO

43、 A, -B, -C T 1 Ct p W W I Cr A. C.SUPPLY PLUG GREEN GREEN RECTIFIER TUBE 5Y3 -G IN PSU 8A 6 BB 5U4 -G IN PSU 10A but with low line voltage, it may be necessary to turn the plug to OLD after a time corresponding to a small fraction of the total life of the vibrator. Testing.-The simplest way to check

44、 PSU 8E or 10E is to plug it into a receiver for which it is designed. (First check the position of the links tor the particular line voltage.) Note whether the dial lamps in the receiver light with normal brilliancy, and measure the rectified B voltage at the receiver to determine whether it is nor

45、mal. If a receiver is not available, dummy loads may be connected to the unit as specified in the table below. The supply current must be measured with a d -c ammeter, not a meter of the ac -dc type, inasmuch as the r.m.s. value of the cur- rent is considerably higher than the d -c current. The heat

46、er voltage must be measured with an r.m.s. meter (thermo-coupled), not with an average meter (rectifier type), on account of the square wave shape. It an accurate thermo-coupled meter is not available, the heater voltage may be checked by observing the brilliancy of the dial lamps in the receiver. T

47、hey will glow dull or red if the heater voltage is low. Precautionary Lead Dress. - (1) Dress all leads on the power transformer primary and the buffer capacitors away from the line chokes. (2) Leads to C19 must be as short as possible. (3) The rectifier filament leads should be run close to each other, and dressed away from the filter chokes. (4) D -C power cord must not touch power transformer. (5) Keep antenna a