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1、107-C FREQUENCY RANGES Standard Broadcast (A Band) Medium Wave (B Band) Short Wave (C Band) INTERMEDIATE FREQUENCY TUBE COMPLEMENT Chassis No. RC -441 Six -Tube, Three -Band, A -C, Superheterodyne Receiver Electrical Specifications 540.1,720 kc (555.174 m) 2.3 7.0 me (130-42.8 m) 7.0.22.0 me (42.8-1
2、3.6 m), 455 kc (1) RCA-6SK7 R -F Amplifier (2) RCA-6SA7 1st Detector -Oscillator (3) RCA-6SK7 I -F Amplifier (4) RCA-6SQ7 2nd Detector, A.V.C., and A -F Amplifier (5) RCA -6F6 -G Output (6) RCA -5Y3 -G. Rectifier Mechanical Specifications Height Width Depth Cabinet Dimensions (inches) . 121/2 . 165/
3、8 . . 101%6 Chassis Base Dimensions (inches) 27/8 . 155/8 . . 61/2 Over-all Chassis Height (inches) . . 77/8 Weight (Net lbs.) 24 Tuning Drive Ratio 10 to 1; 50 to 1 RADIO FULL MEDIUMS LOW SOFT OFF LOUD PHONO ,LOW ,MEDIUM . L FULL i._ ., - . . . ._._. -._. C1=- - _z._StSC A. 55C ECG 7CC tiL 1066 11C
4、C 14CC 17CC .,A POWER-VOLUME-TCNE CONTROL AND PHONO- RADIO SWITCH RANGE -TUNING CONTROL POWER OUTPUT RATING Undistorted 2.5 watts Maximum 4.5 watts LOUDSPEAKER (RL -79A-2) Type 6 -inch electrodynamic V.C. Impedance 3.4 ohms at 400 cycles POWER SUPPLY RATINGS Rating A 105.125 volts, 50.60 cycles, 75
5、watts Rating B 105.125 volts, 25-60 cycles, 75 watts Rating C. 105-130, 140.160, 200-250 volts, 40.60 cycles, 75 watts 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 40 .: ;m., .,;7._ rcm: ,.: ,.,. C 8 9 10 12 14 16 18 20 22 c 350i. 500m 4500. 400m 350m 300m 250m 200m A 50 600 100
6、800 1000 1200 1400 1100 . . . . . . u. B 2.3 2.5 2.7 3.0 3.5 4.0 5;0 .4OIi OmAqAif emammt 670 - 770 _ 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Precautionary Lead Dress: 1. Dress yellow lead from antenna coil to first section of range switch away from adjoining wires. 2. Dress
7、 green lead from middle section of gang and green lead from 6SA7 to the rear section of the range switch away from chassis, ground leads, other wires and capacitors. 3. Dress brown lead from detector coil to rear section of the range switch away from the detector coil; loop brown lead toward real ap
8、ron. 4. Dress black lead from 2nd I. F. transformer B to 6SQ7 socket a ainst chassis. Calibration Scale Reduced Reproduction of Receive, that, and Corresponding 0-180 Calibration Scales The corresponding position of the dial indicator for any setting of the calibration scale can be determined by dra
9、wing a line from this point on the bottom calibration scale to the same point on the top calibration scale. For example: 33 on the calibration scale corresponds to approximately 7.9 me nn C hand, and 600 kc on A band, etc. Read instructions under Align- ment Procedure. 5. Twist power leads together,
10、 and dress away from 6SQ7 socket. 6. Dress blue lead from 6SK7 (R -F) socket to detector coil away from chassis, ground shields and other wires. 7. Dress black lead from antenna trimmer (Cl) to antenna coil away from range switch link action. 8. Dress black speaker lead around output socket toward p
11、ower transformer, against base. 9. Keep green lead of 6SK7 RF grid circuit away from blue a le 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 108-C 69$ Alignment rest -oscillator. -For all alignment operations, connect the low side of the tes
12、t -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. Calibration Scale on Indicator -Drive -Cord Drum.-The tuning dial is fastened in the cabinet and cannot be used for reference during alignment ; therefore, a calibration scale is attached to the re
13、ar of the drum which is mounted on the front shaft of the gang condenser. The setting of the gang condenser is read on this scale, which is calibrated in degrees. The correct setting of the gang in degrees, for each alignment frequency, is given in the alignment table. Pointer for Calibration Scale.
14、-Improvise a pointer for the calibra- tion scale by fastening a piece of wire to the gang -condenser frame, and bend the wire so that it points to the 180 mark on the Calibration scale when the plates are fully meshed. C1 CZ C3 CANT SANT. A -ANT 20 MC e MC /1500 KC. C5 0 C17 o C9 Ce CT Ct LCtS ADET.
15、 BDET. CDET C 05C. AO5C 1500 KC. e MC. 20 MC. 20 MC. 600 KC. 1500 KC. C136OSC. 6 MC. 15T SE i oscT, IST I F TRANSI OJ1 JT vJL1 4 SEC 455 5 KC 2ND. SET AVC 5AF. 2ND. 1.F TRANSI L 15 SEC. ADJ. 455 KC. F RECT. TI POWER TRANS. L14 PRI. ADJ. 4.55 KC. VICTROLA JACK Procedure Dial -Indicator Adjustment. -A
16、fter fastening the chassis in the cabi- net, attach the dial indicator to the drive cable with indicator at the 530 kc mark, and gang condenser fully meshed. The indicator has a spring clip for attachment to the cable. For additional details, refer to booklet RCA Victor Receiver Alignment. Steps Con
17、nect the high side of test- ose. to Tune test- osc. to Turn radio dial to Adjust the follow - ing for maximum peak output 1 .6B8 -I -F grid in series with .01 mfd. 455 kc Quiet point on C Band L14 and L15 (2nd I -F Trans.) 2 Stator of middle section of gang C17 in series with .01 mfd. L12 and L13 (1
18、st I -F Trans.) S Ant. terminal in series with 200 mmfd. 800 kc 600 kc (148) A Band L11 (osc.) Rock gang 4 1,500 kc 1,500 kc (28) A Band C15 (osc.) C9 (det.)t C3 (ant.) 5 Ant. terminal in series with 300 ohms 6.1 me 6.1 me (29) B Band C13 (osc.)* C8 (det.)t C2 (ant.) 6 20 me 20 me (23) C Band C11 (o
19、sc.) C7 (det.)t C2 (ant.) * Use minimum capaci y peak if two peaks can be obtained. t Use maximum capac ty peak if two peaks can be obtained. NOTE: Oscillator tracks 455 kc above signal on -all bands. C35 (I) (21 I (41 (6) CATHODE CURRENTS 6t;K7 65A7 68 K7 65 O.7 GF GG TOTAL RECTIFIED CURRENT C34 C2
20、8 C 20 END. I.F. TRANS. OSCILLOGRAPH CONNECTIONS VERTICAL HI TO THIS TERMINAL VERTICALO TO CHASSIS RG 6S K7 16.0 9 . E3 14.3 O 4 38 65 79. IS C3 C2 CI VOLTAGES SHOULD HOLD WITHIN 70% WITH 1(7 V. A.C. SUPPLY. STARRED (rM) VOLTAGES ARE OPERATING VOLTAGES IN CIRCUITS WITH HIGH SERIES RESISTANCE; THE AC
21、TUAL MEASURED VOLTAGES WILL BE LOWER DEPENDING ON THE VOLTMETER LOADING. C13 LI2 PRI. ADJ 4.55 KC. -f C35 6SA7 1ST. PET. C34 _io LLO Jpp KY t uu W ,II )28 II IL .*000aI-ta% 4 o o o 0 O 0 O ,r) . J O 1IHI F I $ na Np N Z V U 4N4 yi, -IkUI b 4 Ju . Q9QJ m 1U u a o d -J J J e PAGE 109-C 6Q I V m a 收音机爱
22、 好者资料库 RadioFans.CN PAGE 110 -C 6QI RANGE SHAFT TUNING rsso,3 CONO. SHAFT .-DRIVE CORD VOL (FRONT GROOVE) 11 CONTROL GEARS PULLEY / / SET SCREwS - SET 13I. -SCREW TUNIG DRIVNE Zd INDICATOR I =i SPRING (REAR GROOVE) corroznsER DRIVE CORD TUNING /) DRIVE /(, PULLEY PULLEY VOLUME CONTROL ARM _- I I I I
23、 = V C WASHER RANGE SWITCH I LINK AND ARM WASHER .W. SHOWN IN -A- BAND POSITION AIL RANGE SW BOTTOM VIEW OF CONTROLS SHOWN GANG AT MAX. CAPACITY PLANETARY 24 TURNS TUNING DRIVe DRIVE CORD ARRANGEMENT REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be p
24、urchased from authorized dealers. STOCK DESCRIPTION STOCK N DESCRIPTION 34502 10194 31767 33819 12714 33817 33820 31868 12723 12720 30904 12404 14712 12694 33235 12811 31405 5107 33584 32787 4839 33014 33762 33763 32824 33756 33815 33814 32635 32713 33770 33773 33185 33787 12471 14281 31388 13716 33
25、489 14284 12454 17440 12285 13730 12879 19801 34087 33772 33788 33771 ASSEMBLIES (RC -441) Arm -Operating arm between knob shaft and range switch shaft Ball -Steel Ball Board -Antenna -Ground board Capacitor -Trimmer capacitor -3 sections of 2-10 mmfd. each (C7, C8, C9) Capacitor -Adjustable trimmer
26、 -2-12 mmfd. (C11, C13) Capacitor -Trimmer capacitor -1 section of 2-20 mmfd. (C15) Capacitor -Trimmer capacitor -3 sections of 3-30 mmfd. each (C1, C2, C3) Capacitor -22 mmfd. (C44) Capacitor -58 mmfd. (C19) Capacitor -100 mmfd. (C39) Capacitor -100 mmfd. (C21, C22) Capacitor -120 mmfd. (C23, C24)
27、Capacitor -180 mmfd. (C25) Capacitor -220 mmfd. (C4, C6, C18, C26) Capacitor -580 mmfd. (C14) Capacitor -3,600 mmfd. (C12) Capacitor -8,000 mmfd. (C37) Capacitor -.0025 mid. (C27, C32) Capacitor -.005 mfd. (C30, C31, C33) Capacitor -.05 mid. (C38) Capacitor -0.1 mid. (C29, C36, C40) Capacitor -Compr
28、ising 3 sections of 10 mid. and 1 section of 20 mid. (C20, C28, C34, C35) Coil -Antenna coil A -B -C -Band (Ll, L2, L3, L4) Coil -Detector coil A -B -C -Band (Lb, L6, L7, L8) Coil -Oscillator coil A -B -C -Band (L9, L10, L11) Condenser -Variable tuning condenser (C5, C10, C17) Control -Tone control
29、(S8) Control -Volume control and power switch (R10, S8) Cord -Indicator drive cord Core -Core and stud for oscillator coils Drive -Planetary tuning drive leas balls, shafts and shaft retainer Druns-Variable tuning condenser drum and hub Gear -Gear and hub for volume control and switch Link -Operatin
30、g link between knob shaft and range switch Plate -Cushion socket mounting plate assembly less socket Resistor -68 ohms, 4 watt (R1, RS) Resistor -390 ohms, 1 watt (R12) Resistor -2,200 ohms, 3 watt (R9) Resistor -15,000 ohms, 24 watt (R5) Resistor -22,000 ohms, 1/10 watt (R7) Resistor -33,000 ohms,
31、4 watt (R19) Resistor -58,000 ohms, I watt (R18) Rasttor -470,000 ohms, 4 watt (R18, R14) Rasistor-1 meg., 4 watt (R2, RS) Resistor -2.2 meg., 4 watt (R4) Resistor -10 meg., 4 watt (R11) Retainer -Retaining wisher for range switch shaft Shaft -Range switch shaft Shaft -Shaft and gear for tone contro
32、l Shaft -Tuning shaft 31364 14278 31251 31418 13638 33769 33757 33428 14308 31734 31733 31735 32907 33966 32906 5118 32905 33798 33797 33774 4982 14270 34138 - Additional Stock Socket -Lamp socket Socket -Single contact socket and plate for phono- graph input Socket -Tube socket Spring -Condenser dr
33、ive cord spring Spring -Indicator drive cord spring Spring Planetary tuning drive spring Switch -Range switch (Si, S2, S3, S4, S5) Transformer -First i -f transformer (L12, L13, C21, C22) Transformer -Second i -f transformer (L14, L15, C23, C24, C25, R7) Transformer -Power transformer 110 volts, 25
34、cycle (Ti) Transformer -Power transformer 110 volts, 60 cycle (T1) Transformer -Power transformer 105/130 140/ 160 200/250 volts, 60/60 cycle (T1) SPEAKER ASSEMBLIES (RL -79A-2) Cap -Dust cap Coil -Field coil (L18) Coil -Neutralizing coil (L17) Plug -3 prong male speaker plug Transformer -Output tra
35、nsformer (T2) MISCELLANEOUS ASSEMBLIES Dial -Dial scale Frame -Dial frame assembly complete leas dial scale Mounting -Speaker mounting hardware Spring -Retaining spring for knob Stock No. 34136 Spring -Retaining spring for knob Stock No. 34570 Spring -Retaining spring for knob Stock No. 34571 Replac
36、ement Ports: P No. 34662 Cord -Condenser drive cord 11761 Lamp -Mazda No. 51 15441 Cone -Cone complete with voice coil, suspension, and dust cap 34571 Knob -Range switch knob (brown) 34570 Knob -Tone control knob (brown) 94136 Knob -Tuning or volume control (brown) x4984 Knob -Range switch knob (black) .14983 Knob -Tone control knob (black) 34982 Knob -Tuning or volume control (black)
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