RCA-Victor-Co-Inc-16T4 电路原理图.pdf

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1、PAGE 354-C MODEL 16T4 Chassis No. RC -509 Six -Tube, Three -Band, AC, Superheterodyne Receiver FREQUENCY RANGES Electrical and Mechanical Specifications PUSH BUTTON FREQUENCY RANGES Broadcast 540-1,560 kc One station between approximately 540-1,030 kc B Band 1.4-4.5 mc One station between approximat

2、ely 610-1,250 kc C Band 5.8-18 mc Two stations between approximately 740-1,430 kc INTERMEDIATE FREQUENCY 455 kc One station between approximately 880-1,560 kc TUBE COMPLEMENT POWER SUPPLY RATINGS (1) RCA-6SK7 R -F Amplifier 105-125 volts, 50-60 cycles (2) RCA-6SA7 1st Det., Oscillator 105-125 volts,

3、 25-60 cycles (3) RCA-6SK7 I -F Amplifier (4) RCA-6SQ7 2nd Det., A.V.C. and TUNING DRIVE RATIO A -F Amplifier (5) RCA-6K6GT Power Output (6) RCA -5Y3 -G Rectifier PILOT LAMP Mazda No. 51, 7.5 volts, 0.20 amp. POWER OUTPUT RATING Undistorted 2.5 watts Maximum 4.5 watts LOUDSPEAKERS Size 6 -inch V.C.

4、impedance at 400 cycles 3.4 ohms Identification Number RL -79B1 i:5 /A LOOP O O O 4 3 0 if TRIMMER SCREWS O CORE RODS % A G O - ANTENNA -GROUND - LINK TERMINAL BOARD TO REMOVE BACK, TAKE OUT THESE TWO SCREWS - POWER CORD - CONNECTOR FOR VICTBOLA OR TELEVISION ATTACHMENT CHASSIS SOFT OFF - LOUD - LOW

5、,v 7lHILGHC B) ARPB POWER -VOLUME / VICTROLA-RADIO TUNING RANGE CONTROL TONE CONTROL CONTROL CONTROL 70 watts Height (inches) 9 70 watts Width (inches) 19* 12 to 1 Depth (inches) 82 Weight, lbs. net 172 Push Button Adjustment The push buttons connect to sepal:de magnetite -core oscillator coils and

6、separate antenna trimmers which must be adjusted for the desired stations. Use an insulated screwdriver or alignment tool such as RCA Stock No. 31031. Allow at least five minutes warm- up period before making adjustments. In the event that the receiver is to he used with an external an- tenna use on

7、e or two feet of wire (as an antenna) to ensure sharp peaking during the final adjustment procedure. For loop operation, the link should be strapped across A and G terminals on back of set. In either case the procedure is as follows: 1. Make a list of the desired stations, arranged in order from low

8、 to high frequencies. 2. Turn the range selector to A band, and manually tune in the first station on the list. 3. Turn range selector to PB position, push in station button No. 1 (extreme left). Then adjust the No. 1 oscillator core (L9) to receive the station. 4. After oscillator core is adjusted

9、properly, adjust C-44 for maxi mum output. Owing to the relatively high RF gain, it may be found that there are several settings of each push-button magnetite core that will bring in any particular station. In such cases it is advisable to unscrew the push-button loop trimmers to minimum capacity be

10、fore adjusting the push-button magnetite cores. Clockwise adjustment of cores and trimmers tunes the circuits to lower frequencies. 5. Adjust for each of the remaining stations in the same manner. 6. Make a final careful adjustment of the oscillator cores and antenna trimmers. Tone Control The tune

11、control has four positions for radio, and four positions for Victrola or Television sound: No. 1-Radio-maximum low-minimum high No. 2-Radio-maximum low-reduced high No. 3-Radio-maximum low-maximum high No. 4-Radio-minimum low-maximum high No. 5-Phono-maximum low-minimum high No. 6-Phono-maximum low-

12、reduced high No. 7-Phono-maximum low-maximum high No. 8-Phono-minimum low-maximum high (No. I is full counter -clockwise, and No. 8 is full clockwise.) REFER TO PAGE 350C FOR SUPPLEMENTARY INFORMATION 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

13、 PAGE 352-C 16111 Alignment Procedure Cathode -Ray Alignment is the preferable method. Connections for the oscillograph are shown in the schematic diagrams. Output Meter Alignment.-If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. Test-

14、Oscillator.-For all alignment operations, connect the low side of, the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or Volt Ohmyst provides an unexcelled output indicator. It

15、should be connected to the AVC bus, and the test -oscillator output adjusted to produce several volts of AVC. Calibration Scale.-The glass tuning dial may be easily removed from the cabinet and temporarily attached to the chassis for quick reference during alignment. Or, if necessary, the calibratio

16、n scale printed in this service note can he used in conjunction with an ordinary 12 -inch ruler as an accurate and convenient substitute for the regular dial. Each method is described below. Using Tuning Dial. - 1. Slide out the flat spring clamp at each end of the dial, and remove the glass dial fr

17、om the cabinet. 2. With gang in full mesh, move the dial pointer to the reference mark at the left-hand end of the dial backing plate. 3. Place the glass dial under the pointer so that the extreme left scale graduations coincide with the pointer. Use scotch tape to hold the glass dial in this positi

18、on. 4. After completion of the alignment, replace the glass dial in cabinet, taking care that the fibre light shields are in correct position at ends of dial. Using Calibration Scale. - 1. With gang in full mesh, move the dial pointer to the reference mark at the left-hand end of the dial backing pl

19、ate. a n 2. Place a flat 12 -inch ruler on the dial backing plate so the left -end of ruler is at the reference mark at left -end of backing plate. Temporarily fasten the ruler with scotch tape to the backing plate. 3. Refer to calibration scale printed in this service note. This is a reduced reprod

20、uction of the dial with, an inch -scale drawn at top and bottom. To find the correct pointer position in inches for any desired frequency, draw a vertical line through this frequency on the calibration scale. For example, 1,500 kc is approximately 4 inches from the reference mark. Dial -Pointer move

21、 the dial graduation on Adjustment.-After the chassis is replaced in cabinet, pointer (if necessary) so that it is at the left-hand the dial with the gang in full mesh. Steps Connect the high side of the test-osc.to-peak Tune teat- osc. to- Turn radio dial to- Adjust the follow - ing for maximum out

22、put- 1 I-F grid, in series with .01 455 kc A band, Quiet Point at 1,500 kc end of dial L12 and L13 (2nd I.F. Trans.) 2 lst-Det. grid, in series with .01 L10 and L11 (1st I.F. Trans.) 3 Antenna terminal, in series with 300 ohms (link open) 15.2 mc 15.2 mc C band C11 (osc.)* C2 (ant.) 4 2.44 mc 2.44 m

23、c B band C3. osc.) Rock in 5 Antenna terminal, in series with 200 mmfd. (link open) 1,500 kc1,500 kc A band C29 (ose.) C3 (ant.) 6 600 kc 600 kc A band L4 Rock in 7 Repeat steps 5 and 6. Use minimum capacity peak if two peaks can be obtained. Check t.i determine that the correct peak has been used,

24、by tuning receiver to 14.29 mc, where a weaker signal should be received. Note: Oscillator tracks above signal on all bands. RED BLUE GRN TO SI -S2 INCHES I 2 3 4 5 III IiIIlil Ili li i1il1Ji1111i11i111111111i11i111IilllilI1111i1I11111111 SHORT WAVE HAVANA CINCIT I PITTSGH BERLIN. PHIL A. LONDON MEX

25、. CY. 49M N. YORK 0 EASTERN LONDON H. KONG LONDON LONDON H. KONG PARI S HEMISPHERE PAR 15 SCHENY TOKYO PAR 15 RB ELINHUIZEN 40 M 31M 25 M AMTR 19 M 16 M LONDON 1 a 10 12 14 16 Ia . .u. . . tat .ill .la.u.uu.u. u.Luuuul. a I BROADCAST 55 60 10 EllI 100 I20 ISO it 1 . .uuu . R .n.Ru.uu.uuuER. SPECIAL

26、1.4 TROPICAL BROADCAST TROPICAL AMERICAN POLICE BROADCAST POLICE AMATEUR 120 M AIRCRAFT 90 M AMATEUR I.6 1.1 2.1 . . 2.5 111111 3.0 aia 3.5 . 4.1 . l . . 4.5 _ INCHES 1III1III1 1 I 111111J11I111 1I1111I111111111I1IIIIIIII1lI11lI1hill! 4 5 收音机爱 好者资料库 RadioFans.CN x0 o x2 og d, d No uO S N 111 N co 00

27、0. Z Np1 R W OAF W o m u na-6b w p W 2. c, J O PAGE 3S3-C 16T1+ N ,G (/1 U H or. V o (r) 收音机爱 好者资料库 RadioFans.CN PAGE 35-4-C 16Th Replacement Parts Insist on genuine factory -tested parts, which ere readily identified and may be purchased hom authorized dealers. STOCK DESCRIPTION STOCK N DESCRIPTION

28、 ASSEMBLIES 12285 Resistor -470,000 ohms, i watt (R11, R13) (RC -509) 12679 Resistor -2.2 meg., watt (R2, R8) 13601 Resistor -10 meg., watt (R12) 34785 Board-Antenna-Ground board 35862 Shaft-Tuning shaft 35857 Capacitor-Mica trimmer -1 section of 3-30 35772 Shield-Power transformer bottom shield mmf

29、d. and 1 section of 8-80 mmfd. 35934 Shield-Power transformer top shield assembly 35866 Capacitor-Mica trimmer -3 sections of 8-80 31364 Socket-Dial lamp socket mmfd. 35787 Socket-Phono. input socket 35869 Capacitor-Mica trimmer comprising 1 section of 31251 Socket-Tube socket 10-160 mmfd., 2 sectio

30、ns of 25-250 mmfd., 1 31418 Spring-Drive cord spring. section of 50-400 mmfd., and 1 section of 100- 35868 Switch-Push button switch 540 mmfd. 35863 Switch-Range switch 12720 Capacitor -100 mmfd. (C1, C5, C7) 35636 Transformer-First I -F transformer 34689 Capacitor -100 mmfd. 35790 Transformer-Secon

31、d I -F transformer 34700 Capacitor -120 mmfd. 35588 Transformer-Power transformer -110 volts, 25 13003 Capacitor -180 mmfd. (C18) cycle 12952 Capacitor -330 mmfd. (C19) 35853 Transformer-Power transformer-less end shields 35877 Capacitor -720 mmfd. (C27) 110 volts, 60 cycle 13895 Capacitor -5,600 mm

32、fd. (C32) 33726 Washer-C washer for tuning shaft 34459 Capacitor-.0025 mfd. (C33) 33640 Capacitor-.005 mfd. (C20, C21, C23, C31) SPEAKER ASSEMBLIES 4937 Capacitor -.01 mfd. (C6) (RL -79B1) 32787 Capacitor-.05 mfd. (C4) 4839 Capacitor -0.1 mfd. (C15, C30) 35849 Cap-Dust cap 35858 Capacitor-Electrolyt

33、ic comprising 2 sections of 35880 Coil-Field coil 10 mfd., 450 volts and 1 section of 20 mfd., 35441 Cone-Cone complete with voice coil 25 volts 35879 Transformer-Output transformer 35876 Coil-Coil and resistor assembly (L2 and R16). 35785 Coil-Loop primary (L1) MISCELLANEOUS ASSEMBLIES 35789 Coil-O

34、scillator coil 35803 Coil-Oscillator coils for push button switch 35883 Button-Push button (dark brown) 35874 Condenser-Variable tuning condenser 36299 Button-Push button (light brown) 35860 Control-Tone control 35919 Decalcomania-Control panel decal 35859 Control-Volume control and power switch 353

35、93 Decalcomania-Television decal 32634 Cord-Drive cord 35916 Dial-Glass dial scale 35871 Core-Adjusting core and stud for oscillator 35915 Escutcheon-Dial scale escutcheon-less dial coils 35881 Escutcheon-Push button escutcheon 35788 Core-Core and stud for oscillator coil 35814 Knob-Tone control or

36、range switch knob (dark 35870 Indicator-Station selector indicator brown) 35855 Loop-Antenna loop complete 36297 Knob-Tone control or range switch knob (light 35856 Loop-Antenna loop winding brown) 35872 Plate-Dial back plate 35775 Knob-Tuning or volume control knob (dark 32289 Pulley-Drive cord pul

37、ley and rivet brown) 30681 Resistor -470 ohms, 1 watt (R14) 36298 Knob-Tuning or volume control knob (light 14720 Resistor -1,000 ohms, watt (R3) brown) 14024 Resistor -2,700 ohms, & watt (R17) 11765 Lamp-Dial lamp 30694 Resistor -3,900 ohms, watt (R1) 36149 Marker-Station selector marker 35875 Resi

38、stor -12,000 ohms, 3 watts (R7) 34053 Spring-Retaining spring for button Stock No. 13998 Resistor -22,000 ohms, watt (R9) 35883 12454 Resistor -33,000 ohms, watt (R5) 30900 Spring-Retaining spring for knobs Stock Nos. 12412 Resistor -47,000 ohms, I. watt (R4) 35814 and 35775 REFER TO PAGE 350C FOR SUPPLEMENTARY INFORMATION