RCA-Victor-Co-Inc-RC-394 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN PAGE 560-C MODEL M-70 Chassis No. RC -394 Seven -Tube, Push -Button, Superheterodyne Automobile Receiver RCA Victor M-70. RCA TUBE COMPLEMENT Model M-70 consists of a 7 -tube, superheterodyne automobile receiver and an eight -inch electrodynamic loud speaker built in two sepa

2、rately housed components. A small tuning unit for mounting under the instrument panel contains four tubes, while the cylin- drical loudspeaker housing for firewall mounting contains three tubes. Electrical Specifications (4) RCA -6R7 Second Det., A -F Amp., and A.V.C. (1) RCA -6K7 R -F Amplifier (5)

3、 RCA -6V6 -G Power Output (2) RCA -6A8 First Detector -Oscillator (6) RCA -6V6 -G Power Output (3) RCA-6SK7. I -F Amplifier (7) RCA -0Z4 -G Rectifier Tuning Range 550 to 1,550 kc INTERMEDIATE FREQUENCY - 260 kc POWER OUTPUT RATINGS LOUDSPEAKER Maximum 8 watts Type Electrodynamic Undistorted 6 watts

4、Voice -Coil Impedance 3 ohms at 400 cycles POWER SUPPLY RATING Supply Voltage ,. 6.3 vots Current Drain 8.7 amperes Fuse Protection 15 ampere PILOT LAMP Mazda No. 51, 6-8 volts, 0.2 ampere Mechanical Specifications RECEIVER CASE DIMENSIONS Height, 21/2 inches; Width, 57/8 inches; Depth, 91/4 inches

5、SPEAKER CASE DIMENSIONS Diameter, 91/2 inches; Depth, 5 inches OPERATING CONTROLS (Le(t)-(Plastic Knob) PowerVolume; (Wing Knob) Tone; (Center) -Five Station Push Buttons: (Right)-Manual Tuning; Ratio 71/2 - 1. WEIGHT Net, 20 pounds; Shipping, 22 pounds Adjustment of Push -Button Mechanism The mecha

6、nism should he adjusted so that when using either manual or push-button tuning, it operates positively and without backlash or bind. The following hints will he found helpful in adjusting the mechanism properly. 1. With the gang condenser in full mesh, the sector gear should have the two end teeth f

7、ully meshed in the scissor gear, as shown in the illustration. 2. The position of the sector gear on the rocker -plate shaft should be adjusted so that there is clearance between the rocker -plates and the frame of the push-button mech- anism at both extremities of gang rotation. Thus cor- rect adju

8、stment prevents the rotation of the gang being limited by the rocker plates touching the frame. 3. The drive cord should have 61/2 turns around the tun- ing shaft as shown in the illustration. Three degrees of adjustment of the tension on the drive cord may he obtained by use of the three positions

9、for connecting the drive -cord -tension spring to the drive -cord drum on the condenser shaft as shown. 4. The push -arms, rocker -plate shaft, and pulleys should be lubricated with light grease (sparingly). Care should be taken to keep the lubricant off of the drive cord. TURN FREE GEAR CLOCKWISE O

10、NE TOOTH TO OBTAIN SCISSOR ACTION BEFORE MESHING GEAR SECTOR Drive Cord Hookup 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 IY z z Hiv -18 zo J 11 II rl NOFI Oit -1 -7 e I 2,-(2.,0:-. arI n O, U wf Ur J M W W w F UF j z s L F ac W 22 v w UN s -F

11、 I I w CS vqOLL l7 oF Nf i f_w uay FIM cc y = U . 33 g of r11 *.000 . o ,I T tiF o (OOC ran Co /it IU + a 4 AQZ u. r-01 uF OF 22 NOF Umy G vIo4 UOi 4 i II au O ee UF iNli J9 a oo _ A CC z R m II II II II Ii II II II II 3JJ Ogt rd ILI Off L H Y O J a Q lit,r as IY co Fo J J J W, PAGE 561-C M-70 K CD

12、i 收音机爱 好者资料库 RadioFans.CN PAGE 5 vertical 0 to chassis. the lowfrequeny end of the scale. Steps Connect the high side of test- osc. to- Tune test- osc. to- Turn radio dial to- Adjust the follow - ing for max. peak output 1 6SK7 I -F grid (No. 4 pin) in series with .01 mfd. 260 kc No Signal L10 and L

13、11 (2nd I -F Trans.) 2 6A8 Det. grid cap in series with .01 mfd. 260 kc 550-750 kc L8 and L9 (1st.I-F Trans.) 3t * Ant. connector in series with 60 mmfd. 600 kc 600 kc L7 (osc.) 4 t * Ant. connector in series with 60 mmfd. 1,400 kc 1,400 kc signal C7 (det.) Cl (ant.) 5t * Ant. connector in series wi

14、th 60 mmfd. 600 kc 600 kc (rock) L7 (osc.) 6 t * Ant. connector in series with 60 mmfd. 1,400 kc 1,400 kc signal C7 (det.) Cl (ant.)* Note 1.-This 60 mmfd. capacitor must be inserted at the antenna connector of the receiver. The lead from the test oscillator to the 60 mmfd. capacitor may be shielded

15、 if desired, but no shielding should be used between capacitor and antenna connector. f Note 2.-These adjustments should be made with unit enclosed in its shielded case, through holes provided for adjustment purposes. *Note 3.-Final adjustment of Cl must be made after the receiver has been installed

16、 and the antenna connected. See An- tenna Circuit. Antenna Circuit L9 L11 It is veryimportant that these instructions be followed 260SE K P 260 KC. KC. when installing the M-70 receiver. The antenna circuit is designed to work with ar antenna having a total capacity including the shielded lead-in no

17、t to exceed 150 mmf. If an antenna having a larger capacity is 15T TRANS. y 6SK1 3 ZED , TRANS. sR 4 to be used, it will be necessary to add a capacitor in series with the lead from the antenna filter L-1 to the antenna coil GOO KC. terminal (A). Where a Double Under the Running ,- Board type of ant

18、enna is to be used having a capacity of C-1/ approximately 200 mmf., the capacitor added should be ap- I400 KG. proximately 500 mmf. The insulated running board typeM. LF - _-_, OSC 6A8 COIL 2 V R, F.- 1 TRANS TT.AV.0 R.F 6K1 having an approximate capacity of 550 mmf. will require a capacitor of app

19、roximately 150 mmf. Cars using an insulated 15T DET _ - A E steel top of approximately 3,500 mmf. will require a series DET capacitor of 150 mmf. 140bKC. After installation and with antenna connected, tune in a weak station near 1,400 kc and adjust compensator trimmer C-1 for maximum signal output.

20、This trimmer is accessible C-6 C 10 C-3 q e o I i ANT. COIL 1 L-2 L 3 L-1 by removing plug button near antenna jack on top of re- ceiver. If a maximum (peak) signal output cannot be ob s a.c3o ELEc_ a p 2. Using the tuning control, accurately tune in the first 260V 265V station. first but- C 35 3. W

21、ith station accurately tuned in, press the push ton fully in and then gently release so as not to jar SPARK PLATE C36 T I Lt7 mechanism. C34 A LEAD C33 Tighten button fingers. Do 4. the push securely with not -_- force with pliers. L-1 A 5. Proceed in same manner to adjust the other four push I;Iql

22、r L 15 buttons. Push-Arm Inserts: - _ SOCKET FOP JOLTAGE S - JoL CABLE - Special push -arm inserts are now available to take care of stripped threads on the push Power Unit Parts and Socket Voltages button mechanism in these models. Stock No. 36161 Insert is for use in. Models Additional Replacement

23、 Part: M-50, M-60, and 11-70. P Stock No. REPLACEMENT PARTS 35253 Power cable and plug Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers STOCK No. DESCRIPTION STOCK No DESCRIPTION 32973 32979 31728 12723 30904 12694 30433 33052 5148 14

24、393 4937 5196 32787 4839 31801 31977 32977 32978 31600 32974 32634 32975 32982 32976 32290 32985 11765 32981 32980 14439 14561 14720 13716 30409 12454 12266 30434 12286 12285 13730 13471 3584 14350 31482 32983 32983 12883 32984 31364 32299 30585 31615 32990 CHASSIS ASSEMBLIES (RC -394) Button -Push

25、button Capacitor -Adjustable trimmer, 15-150 Mmfd (C1) . Capacitor -37 Mmfd. (C11 temperature com- pensating) Capacitor -56 Mmfd. (C24) Capacitor -100 Mmfd. (C15, C16, C17, C18) Capacitor -220 Mmfd. (C19, C20) Capacitor -470 Mmfd. (C5, C26) Capacitor -800 Mmfd. (C12) Capacitor -.007 Mfd. (C21) Capac

26、itor -.01 Mfd. (C2, C37) Capacitor -.01 Mfd. (C23) Capacitor -.035 Mfd. (C25) Capacitor -.05 Mfd. (C6, C13, C14, C22) Capacitor -0.1 Mfd. (C4) Coil -Antenna coil -less shield (L2, L3) Coil -Antenna choke coil (L1) Coil -Oscillator coil -less shield (L6, L7) Control- Volume control, tone control, and

27、 power switch (R9, R16, S1) Coil-R.F. coil -less shield (L4, L5) Condenser -3 -gang variable tuning with gear (C3, C7, C8, C9, C10) Cord -Drive cord Dial -Dial scale only -less frame Drum -Variable condenser drive drum Frame -Dial scale frame and holder Gear -Tuning unit gear sector Indicator -Dial

28、indicator pointer Lamp -Dial lamp Pulley -Drive cord pulley (1) and bracket Pulley -Drive cord pulleys (2) and bracket Resistor -100 ohms, watt (R6) Resistor -220 ohms, watt (R2) Resistor -1,000 ohms, watt (R12) Resistor -2,200 ohms, watt (R13) Resistor -27,000 ohms, i watt (R17) Resistor -33,000 oh

29、ms, watt (R7) Resistor -39,000 ohms, watt (R4, R8) Resistor -39,000 ohms, 1 watt (R5) Resistor -56,000 ohms, watt (R3) Resistor -470,000 ohms, watt (Rl) Resistor -1 Meg., watt (R11, R14, R15, R21) Ring -Retaining ring for antenna coil shield Ring -Retaining ring for R.F. coil Screw -No. 8-32 x 3/16

30、sq. hd. set screw for drum Screw -No. 8-32 x sq. hd. set screw for gear sector Shaft-Tning knob shaft Shield -Antenna coil shield Shield -Oscillator coil shield Slide -Dial pointer slide rail Socket -Dial lamp socket Socket -Octal base tube socket Spring -Push button arm spring Spring-Driv.- cord te

31、nsion spring Transform -r -First I.F. transformer (LB, L9, C15, C16) 32991 32972 2917 32240 5107 30626 30965 12741 30641 33064 30540 31388 12695 13686 33063 32299 32243 32241 32986 13688 32988 33017 32989 12252 32987 32755 5025 32992 4291 31456 32994 5023 4290 32996 32995 32993 7766 31589 32998 3299

32、7 32317 12252 5024 32769 Transformer -S e con d I.F. transformer (L10, L11, C17, C18) Tuner -Tuning mechanism - comprising push arms, and cam plates, assembled in metal frame -less push buttons Washer -C washer for tuning shaft POWER UNIT ASSEMBLY Capacitor -Electrolytic -2 sections 10 mfd., one sec

33、tion 20 Mfd. (C28, C30, C31) Capacitor -.0025 Mfd. (C27) Capacitor -.0075 Mfd. (C32) Capacitor -0.25 Mfd. (C29) Capacitor -0.5 Mfd. (C34, C35) Lead -A lead complete with male section of fuse holder Reactor -Filter reactor (L15) Resistor -100 ohms, watt (R19, R20) Resistor -390 ohms, 1 watt (R18) Res

34、istor -15,000 ohms, i watt (R10) Socket -4 -contact vibrator socket Socket -6 -contact socket for power cable Socket -Octal base tube socket Transformer -Driver transformer (T2) Transformer -Output transformer (T3) Transformer -Vibrator power transformer (T1, L17, C33) Vibrator -Plug-in unit (L16) S

35、PEAKER ASSEMBLIES Case -Speaker and power unit case -less screen Cone -Speaker cone and voice coil (L14) Screen -Speaker case grille and screen Screw -No. 8 x self -tapping screw for speaker case Speaker unit only (L13, L14) MISCELLANEOUS ASSEMBLIES Button -Plug button for receiver case Capacitor -G

36、enerator capacitor, .5 Mfd Case -Receiver case -less push button escutcheon Clip -Ammeter clip. Cover -8 celluloid covers for station call letter markers . Escutcheon -Push button escutcheon Fuse -15 amperes. Insulator -Fuse insulator sleeve. Knob -Dummy knob Knob -Tone control and switch knob Knob

37、-Volume control, or tuning knob Lead -Ammeter lead and clip Marker -Push button station marker Mounting -Complete set of hardware for mount - ing speaker unit Moun rg-Complete set of hardware for mount- eceiver unit Screw r No. 8-32 x 7/32 set screw for volume control or tuning knob Screw -No. 8 x 4 -in. lg. self -tapping screw for speaker case. Suppressor -Distributor suppressor Washer -Felt washer for under knob