RCA-Victor-Co-Inc-8Q4 电路原理图.pdf

《RCA-Victor-Co-Inc-8Q4 电路原理图.pdf》由会员分享，可在线阅读，更多相关《RCA-Victor-Co-Inc-8Q4 电路原理图.pdf（13页珍藏版）》请在收音机爱好者资料库上搜索。

1、Eight -Tube, Four -Band Superheterodyne Miscellaneous Service Data Plug for Extension Loudspeaker.-A two -contact female socket, equipped with a male plug, is connected across the secondary of the output transformer on the loudspeaker to facilitate the connection of an extension loudspeaker if de- s

2、ired. A permanent magnet dynamic speaker, with voice -coil impedance of not less than 2 ohms is recommended. The voice coil of the extension speaker should be connected by means of two -conductor cable (such as is used on electric appliances) to the male plug. This cable may be any desired length up

3、 to several hundred feet. With a long run, it is advisable to use heavier cable. An extension speaker with 2 -ohm voice coil will receive approximately half the power output of the receiver. With a higher -impedance voice coil, the percentage of power delivered to the extension speaker will he decre

4、ased. (A high -impedance magnetic -type speaker may he used in conjunction with a suitable coupling trans- former such as RCA Stock No. 2853.) The RCA M.6248 Alnico 8 -inch diameter permanent -magnet dynamic loud speaker with 2 -ohm voice coil, and 5 -watt power -handling capacity is recommended. Th

5、is speaker may be housed in the RCA MI.6292 sloping -front walnut -finished wood housing. Antenna Connections.-Three terminals (A, G1, and G2) are provided on the rear of chassis. Connect the an- tenna to A. Connect G 1 to a nearby ground. A link connects G1 and G2. In case of electrical interfereri

6、ce (especially on X band) open the link and connect G2 separately to ground. This also applies when a D -C power supply is used. Receiver PAGE 201-C MODEL 804 Chassis No. RC -337A Power Supply Units Model 8Q4 has a seven -prong connector for connection to a separate power supply unit. Units are avai

7、lable in different ratings for a -c and d -c operation, as listed under Power Supply Ratings in the electrical specifications. The d -c power supply unit (PSU 8E) is too large to be mounted inside the cabinet and may be placed on the table behind the receiver, or in any other convenient location tha

8、t permits plugging into the connector on the receiver chassis. Service data, diagrams, and replacement parts lists for the power supply units are printed in separate service data sheets, which should be referred to for further information. Electrical Specifications FREQUENCY RANGES Long Wave (X Band

9、) 150-400 kc (2,000.750 m) Standard Broadcast (A Band) 530-1,720 kc (566.174 m) Medium Wave (B Band) 2.3.7.0 me (130-42.8 m) Short Wave (C Band) 7.0.22 me (42.8.13.6 m) Intermediate Frequency 455 kc RADIOTRON COMPLEMENT (1) RCA -6K7 R -F Amplifier (2) RCA -6L7 1st -Detector (3) RCA -6J7 Oscillator (

10、4) RCA -6K7 I -F Amplifier (5) RCA -6Q7 2nd -Detector, A.V.C., and Audio Pilot Lamps (2) POWER OUTPUT Undistorted (6) (7) (8) (8) RCA -6F6 -G Power Output RCA -6U5 Tuning Indicator RCA -5Y3 -G (In PSU 8A, 8B, 8C AC power supply unit) Rectifier RCA -5W4 (In PSU 8E D -C power supply unit). Rectifier M

11、azda No. 44, 6.3 volts, .25 amp. LOUDSPEAKER (RL -63J-1) 2.5 watts Type 8 -inch electrodynamic Maximum 4.5 watts Voice -Coil Impedance at 400 cycles 2.2 ohms POWER SUPPLY RATINGS A -C Ratings Volts Cycles With PSU 8A 105.125 50-60 With PSU 8B 105.125 25-60 With PSU 8C 105.130, 140-160, 200-225, 225-

12、250 50-60 D -C Rating With PSU 8E . 105-125, 210.250 RANGE INDICATOR FIDELITY CONTROL A 8 RANGE TUNING SELECTOR SOFT MAGIC EVE LOUD VOLUME CONTROL Location of Controls A toggle -type power switch is mounted on the right-hand side of the cabinet BAND- STRIP SPRING 31279 PULLEY .-31280 I - PULLEY 3137

13、9 START SPRINGS 13838 RANGE SWITCH PULLEY 31272 DRUM SHOWN WITH GANG AT MAXIMUM CAPACITY DRUM 31808 PULLEY 31280 PULLEY/ 31373 Di0M DRIVE CORD 31786 IN F NT GROOVE OF DRUM PULLEY 31788 RC- 537A,3376,n7 Arrangement of Drive Cords D -C RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J.,

14、 U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 202-C 8Q1t V m H r J W . m LLp rl. e 4o N oZJ JnJ -12L2 2 r 000 o N I .ONQ OI u 0 NI- CC rv.4 U- -HI 3 HII m II ud i r In N Ir N Er. Q x I. N y V2 itM aW N c_,1112 114 2. H :4; ON O MNW Up a b m _W Q 2. s li aof u2 00001 nb oza a 31-= 61 v 4110 II A .V. 3 2 3 b

15、 b b N L 5 to o fd y y . v .L O C 3 y ., vi .VV+ Q V -E ( c3 2 V ; U e N b V L% e = d L - L ro co % E b Q C V. .+. tu aV+ -e ttl v ; .5. C o LVi E O - A A z -t 4.- e P. . v a .d) - y Q d C b .!.co . w N oA . .ar o b = c m r- e . t o .r -e co r . G c) pp 1;, co. v aQo 3 y m e .7 O y V% y . 4 e 9)a I

16、j y o o a .a. 2 .o U l. O 3 0 b (/) .et b y y d S e 3w dd. O Y . 4:1 CL w1r 74O V 2 2 . Tl33 y - 3 H AoE -I W Q1 .1 N 收音机爱 好者资料库 RadioFans.CN GREEN TO PILOT LIGHT BROWN YELLOW RIO TONE CONTROL ( 56 SELECTIVITY SWITCH s -BLUE )-YELLOW C O 250V DL6 T ORJ R2 C9 L9 E . DET. C7 LLB CL 4O.- COI L7 6 CEOO5

17、C W - C44 L 14 1 X O5C. COIL 1TA 6L7 ID DET. HEATER VOLTAGES 6.45 V. A.C. C 52 C50 C 20 CATHODE CURRENTS (I 6K7 6 2 M.A. (2 6L7 6 O M.A. 05CILLOGRAPH (3 6.17 8.6M.A. CONIC VERTICAL (4 6K7 .6.2 M.A. HI TO LINE, ON (S 607 0 3 M.A. VICTROLA TERM. 6 6F6 42.0 M.A. BD. VERTICAL GUS 1 5 M. A. Yl TO CHASSIS

18、. 1 ! TOW TO Gi ,051t,s6 IK 1.= GREEN - TO PILOT LIGHT Li. CrO L1 13 TAP O GREEN - TO 6J7 GRID LA55DJ L17 4 KC C 14 ANTENNA TERM. BOARD RC -337A T-$8592 G2 GI A R -F Wiring Diagram and Socket Voltages Measurements made to chassis unless otherwise indicated, with set tuned to quiet point and volume c

19、ontrol at minimum. Values should hold within 20% with 117 -volt a -c supply. NOTE: Values with star (*) are operating voltages in circuits with high series resistance. The actual measured voltages will be lower, depending on the voltmeter loading. j111111111I111111111(III111111IIII111111III BLACIL R

20、EO PAGE 203-C 801 -YELLOW =1 m R13 V. Zia ,+. -_ 607 23PDET. A.F. A. TO 6Q7 GRID C21 VICTROLA TERMINALS 3 2 LINK 180 170 160 150 140 130 120 110 100 g0 80 70 60 50 40 30 20 10 O C MC LONDON -BERLIN -HILA. -NOME MEXICO CITI-SPF LD-BUENOS A. HAVANA -SCHENY-MOSCOW 31 ivi LONDON -ROME -PARIS LONDON -SCH

21、ENY NEW YORK BERLIN-TOKYO-PITTSGH BERLIN -PITTSBURGH BERLIN -LONDON HUI=EN 25M PRAGUE LIMA 19m PARIS 16M RRRRRRR RR LONDON -PITTSBURGH BERLIN -NEW YORK 13M II I 1 1 E 1 1 1 1, 1 1 7 . 8 1 1, 1 1 1 1, 1 1 1 1, 1 1 1 9 10 12 IIIIEIII11111 11111111111,11i1,f111,111i,1111 , I 14 16 18 20 22 MC C X KC ME

22、TERS 15I I 10 175 200 250 390 350 I I I I I I I 2000 1800 1600 1400 1200 1000 900 800 KC METERS X A METERS KC 500 450 400 350 300 250 200 1 1 1 I 1 I 1 I 1 I 1 1 1 I II I III, METERS ,1 1, lll I I, 1 I I 1 1 1I I I 1 , 1 1, 1 I 1 I I 1 1 1 11 1 1 111 1 111 i 1 11 11 i i, 1 , 550 600 700 800 1000 120

23、0 1500 1800 A B MC 2.5 3.0 4.0 5.0 6.0 MC I I I I I 1 I 11 I I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1. 1 1 1 1 1 1 1 1 1 1 i 1 i 1 1 1 1 1 1 1 1 120M 100M 75M 62M COLOMBIA S. AMERICA) HAVANA 49M ROSTON- TORONTO -N.Y BOGOTA- MIX. CITY -CINCINNATI- PITTSBIRGN BERLIN-ANAMA CITY -CHICAGO- CAREAS 180 170 160 15

24、0 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 uuluuuuluuuuluuuuluuuuluuuiliulunluuiuduuuuluuuuluuuuluuuuluuuuluuuullwuuluuuuluumlluuuuluu Receiver Dial Scales. and Corresponding 0-180 Calibration Scales 收音机爱 好者资料库 RadioFans.CN PAGE 204-C 804 Alignment Procedure Cathode -stay Alignment is the pr

25、eferable method. Connec- tions for the oscillograph are shown in the chassis Meter Alignment.-If this method is used, connect e the meter across the voice coil, and turn the receiver volume control to maximum. CL O Test-Oscillator.-For - M - C5 RF. all alignment operations, connect the low side of t

26、he test oscillator to the receiver chassis, and keep 45.6:0 the output as low as possible to avoid a -v -c action. Calibration Scale on Indicator -Drive -Cord Drum. - The ANT KC O ANT ILIIILPC , m QO01 3 6.1 MC tuning dial is fastened in the cabinet and cannot be used for reference during alignment;

27、 therefore, a calibration scale is attached to the rear of the drum which is mounted on the front shaft of the gang condenser. The setting of the gang o.3 POWER SUPPLY COIL ca CONNECToe DET gc380 L13 Isoo KcO600 KC IIFIR R2 1sT DET 3Z O condenser is read on this scale, which is calibrated in degrees

28、. The correct setting of the gang in degrees, for each align ment frequency, is given in the alignment table. o, d cab S 3 x ii II ono colt $ 6.1Mc: COO as KC 360 KC C38 DEl. Pointer for Calibration Scale.-Improvise a pointer for the calibration scale byfasteningapiece of wire to the gang 60UTPUT, _

29、l1 21ST .360 KC AFO DVC, 11 O61MC 20MC0 condenser frame, and bend the wire so that it points to the 180 360 I.F. TRANS 2ND Ie TRANS 1ST i.F. TRANS mark on the calibration scale when the plates are fully meshed. / ( s 5CK a L F L23 sec L16 SEC455 Dial-Indicator Adjustment.-After fastening the chassis

30、 in the cabinet, attach the dial indicator to the drive cable with - -. VICTROLA Indicator at the Jett -hand marks on the dial scale, and gang LINK 2 3 TERMINALS condenser fully meshed. The indicator has a spring clip for attachment to the cable. For additional details, refer to booklet RCA Victor R

31、e- ceiver Alignment. 2 A GI yLINK RC -337A 804 P-84464 Steps Connect the high side of test-osc. to- Tune test- osc. to- Turn radio dial to- Adjust the following for max. peak output 6K7 I -F grid cap, with 300 ohm 455 kc L17 and L18* resistor from cap to chassis (3rd I -F Trans.) 2 6L7 1st-Det. grid

32、 cap, with 300 ohm resistor from cap to chassis, regular grid lead removed from cap 455 kc Fidelity contsol counter- clockwise (sharp) L23 and L22 (2nd I -F Trans.) and L16 and L15* (1st I -F Trans.) 3 Antenna terminal (A), in series with 300 ohms 6.1 me 6.1 me (28.2) B band C37 (osc.)* C10 (det.)t

33、C3 (ant.) 4 Antenna terminal, in series with 300 ohms 20 me 20 me (22.5) C band C35 (osc.)tt 5 Antenna terminal, in series with 200 mmf. l,1,500 kc 1,500 kc (32) AC38 band (osc.) 6 Antenna terminal, in series with 200 mmf. 600 kc 600 kc (143.8) A band L13 (osc.) 7 Repeat steps 5 and 6. 8 Adjust C39

34、so that it projects approximately 15/16 -inch above top of chassis. 9 Antenna terminal, in series with 200 mmf. 175 kc 175 kc (121.3) X band L14 (osc.) 10 Antenna terminal, in series with 200 mmfd. 360 kc 360 kc (30.2) X band C39 (osc.) C11 (det) C1 (ant) 11 Repeat oscillator adjustments in steps 9

35、and 10. * Adjust for coincident response curves when using oscillograph. * Readjust L23, L22, L16, and L15 several times to secure coincident curves. Turn fidelity control full clockwise (broad) and check response, which should be symmetrical, and with greater gain than on sharp. * Use minimum capac

36、ity peak if two peaks can be obtained with C37. f Rock the gang condenser slightly and use maximum capacity peak if two peaks can be obtained with C10. Check to determine that C37 has been adjusted to the correct peak by turning receiver to 5.19 me (50) where a weaker signal should be received. $ Us

37、e minimum capacity peak if two peaks can be obtained, and check to determine that C35 has been adjusted to the correct peak by turning the receiver to 19.09 me (271/2) where a weaker signal should be received. NOTE: The oscillator tracks 455 kc above the signal on all bands. PACE 205-C 1 2 3 STOCK N

38、E 9824 8Q 1i TERM. BOARD SWITCH / / / -TER OF CHASSIS (REAR VIEW) PHONO O O POSITION TAPE O PLUS FOR EXT. 8P)a. 4 -RED SHIELD e SPEAKER / FIELD -BLOF SOCKET , GREEN + L YELL +6NEUT. COIL - aOICE COIL K-38107 / QLUG esOWN TOO CONTACT N PSU CON - l9 RECORD PLAYER e z HECTOR. 93 + GF4-G BLACK PLATE BLA

39、CK- Victrola Attachment (Record Player). -Terminals are pro- -BLACK RFA E. vided on the rear of the chassis for convenient connection to BROWN -0.- SCREEN a Victrola Attachment (record player) such as the RCA R-93 SPEAKER PLUG CONNECTIONS 594 and R-94 series. A stock No. 9824 switch may he used to c

40、hange from radio to record player as shown above. Connections of Loudspeaker and Cable SWITCH POSITIONS PHONO RADIO -SHIELDED CABLE /1 - / D.RD.T. SWITCH v / . _ o - _VOLUMEOry In the event that a Stock No. 9824 switch is not available, CONTROL a double -pole -double -throw toggle switch may be used

41、, con, necting it as shown The radio volume control may be used to regulate the OPENy LINK J CRYSTAL OR HIGH PHONO MOTORIMPEDANCE NAG- volume of the record player. AND TURNTABLE NETIC PICKUP +*- 1 2 3 PHONO BOARD ON REAR OF CHASSIS REPLACEMENT PARTS Insist on genuine factory -tested parts, which are

42、 readily identified and may be purchased from authorized dealers. STNo.OCK DESCRIPTION STOCK DESCRIPTION 31815 12717 31303 31820 30766 12607 12714 14079 13200 12722 13545 31270 31813 12724 13003 12952 31790 31792 31405 4838 14393 11315 4886 4839 12484 5212 31818 31810 31782 31783 31812 31811 31774 3

43、1278 31786 31787 31808 31819 11891 31817 5040 14404 31788 31280 31373 31272 14660 14526 14837 13204 RECEIVER ASSEMBLIES (RC -337A) Board -Antenna and ground terminal board Board -Phonograph input terminal board Bracket -Band indicator mounting bracket -less indicating strip, spring, and cord Cable -

44、Indicator pointer drive cable Cap -Rubber cap for Magic Eye Cap -Top shield cap for first or second i -f trans- former Capacitor -Trimmer 2-12 mmfd. (C1, C3, C10, C11, C35, C37, C38, C39) Capacitor -6.8 mmfd. (C54) Capacitor -10 mmfd. (C43, C45) Capacitor -18 mmfd. (C2) Capacitor -39 mmfd. (C44) Cap

45、acitor -100 mmfd. (C17, C18) Capacitor -120 mmfd. (C15, C16, C51, C53) Capacitor -120 mmfd. (C24, C49) Capacitor -180 mmfd. (C19, C49) Capacitor -330 mmfd. (C5, C7, CS) Capacitor -530 mmfd. (C42) Capacitor -4,000 mmfd. (C36) Capacitor -6,000 mmfd. (C47) Capacitor -.005 mfd. (C26, C28) Capacitor -.01

46、 mfd. (C21, C22, C25) Capacitor -.015 mfd. (C52) Capacitor -.05 mfd. (C20) Capacitor -0.1 mfd. (C6, C50) Capacitor -0.25 mfd. (C23) Capacitor -16 mfd. (C29) Clip -Magic Eye mounting clip Coil -Antenna coil (Ll, L2, L3, L4, L5) Coil -Oscillator coil -A band only (L13) Coil -Oscillator coil -B and C b

47、anda only (Ll L12) Coil -Oscillator coil -X band only (L14) Coil -R -f coil (L6, L7, L8, L9, L10) Condenser -3 -gang variable tuning condenser (C4,dan9, Cind46) Cord -Band indicator cord Cord -Variable condenser drive cord Drive -Two -speed drive and mounting bracket Drum -Variable condenser drive cord drum Indicator -Band indicator strip Lamp -Dial lamp Plate -Cushion socket mounting plate -less socket Plug -4 -contact female plug for speaker cable Plug -7 -