RCA-Victor-Co-Inc-9SX-8 电路原理图.pdf

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1、PAGE 237-C - Little Nipper Models 9SX-1, -2, -3, -4, -5, -6, -7, and -8 Five -Tube, Two -Band, AC -DC Superheterodyne Receivers FREQUENCY RANGES Standard Broadcast (A) Short Wave (B) Electrical and Mechanical Specifications 540-1,720 kc 2.3-6.25 mc INTERMEDIATE FREQUENCY 456 kc TUBE COMPLEMENT (1) R

2、CA -6A8 1st-Detector-Oscillator (2) RCA -6K7 I -F Amplifier (3) RCA -6Q7 2nd-Det., 1st A -F, and A.V.C. (4) RCA -25L6 Power Output (5) RCA -25Z6 Half -Wave Rectifier Dial Lamp (1) Mazda 40, 6.3 volts, .15 amp. POWER SUPPLY RATINGS A -C Rating 105-125 volts, 50-60 cycles, 60, watts D -C Rating 105-12

3、5 volts, direct current, 5fkwatts POWER OUTPUT (125 volt, 60 cycle supply) Undistorted , 1.5 watt Maximum . 2.0 watts LOUDSPEAKER Type 4 -inch Electrodynamic Height Width Depth 41 inches . 8 inches . 41 inches Weight 7 pounds (shipping) Cabinet Dimensions. Model 9SX-1, Molded cabinet, walnut finish,

4、 ivory knobs. Model 9SX-2, Molded cabinet, walnut body, ivory front, walnut knobs. Model 9SX-3, Molded cabinet, ivory finish, red. knobs. Model 9SX-4, Molded cabinet, red body, ivory front, red knobs. Model 9SX-5, Molded cabinet, black body, marble front, jet knobs. Model 9SX-6, Molded cabinet, blue

5、 body, onyx front, blue knobs. Model 9SX-7, Molded cabinet, onyx finish, maroon knobs. Model 9SX-8, Molded cabinet, marble finish, jet knobs. Replacement Parts Insist on genuine factory -tested parts, which are readily identified and may be purchased From authorized dealers. STOCK No. DESCRIPTION ST

6、OCK No. DESCRIPTION 31193 Antenna -35 ft. antenna wire-wound on reel 32444 Knob-Station selector knob-Black X-569 Cabinet-Walnut and Ivory cabinet (9SX-2) 32445 Knob-Station selector knob-Maroon X-572 Cabinet-Blue and Onyx cabinet (9SX-8). 32446 Knob-Volume control or range switch knob X-575 Cabinet

7、-Onyx cabinet (9SX-7) -Walnut X-570 Cabinet-Walnut cabinet (9SX-1) 32447 Knob-Volume control or range switch knob X-573 Cabinet-Ivory cabinet (9SX-3) -Ivory X-578 Cabinet-Marble cabinet (9SX-8) 32448 Knob-Volume control or range switch knob X-571 Cabinet-Red and Ivory cabinet (9SX-4) -Red X-574 Cabi

8、net-Black and Marble cabinet (9SX-5) 32449. Knob-Volume control or range switch knob 32392 Capacitor-.0005 mfd. -Blue 32396 Capacitor-.0005 mfd. mica capacitor 32450 Knob -Volume control or range switch knob 32393 Capacitor-.001 mfd. -Black - 4858 Capacitor-.01 mfd. 32451 Knob-Volume control or rang

9、e switch knob 31796 Capacitor-.02 mfd. -Maroon 4886 Capacitor-.05 mfd. 4340 Lamp-Dial lamp-Mazda 40 4839 Capacitor -0.1 mfd. 30540 Resistor -100 ohms, 1/3 watt 32386 Capacitor -10-20 mfd., Electrolytic 32397 Resistor -120 ohms, 1/2 watt, Flexohm. 32394 Capacitor-Trimmer capacitor 1,500 K.C. ad- 3088

10、0 Resistor -150 ohms, 1/3 watt justment (C4) 30492 Resistor -20,000 ohms, 1/3 watt 32395 Capacitor-Trimmer capacitor 1,720 K.C. ad- 3594 Resistor -50,000 ohms, 1/3 watt justment (C3) - 30493 Resistor -150,000 ohms, 1/3 watt 32387 Coil-Antenna coil (T1) 3048 Resistor -500,000 ohms, 1/3 watt 32388 Coi

11、l-Oscillator coil (T2) 30652 Resistor -1 megohm, 1/3 watt. 32389 Coil-Short wave antenna coil (T3) 32398 Screw-No. 6-32 fibre screw-back cover 32379 Condenser -2 -gang variable tuning condenser mounting 32384 Cord-Resistance power cord 32390 Socket -8 -prong moulded Octal tube socket. 32399 Dial-Ind

12、icator dial scale 32380 Speaker-Dynamic loudspeaker 32440 Knob-Station selector knob-Walnut Knob-Station knob-Ivory 32381 Transformer-Output transformer (T6). - 32441 32382 Transformer-First i.f. transformer (T4) . - . selector Knob-Station selector knob-Red 32442 32383 Transformer -Second i.f. tran

13、sformer (T5) . 32443 Knob-Station selector knob-Blue 32385 Volume Control and Switch Additional Replacement Partsr Stock No. 32666 Spring-Tuning knob spring 32667 Spring-Volume or range knob spring 32948 Switch-Range switch 32949 Socket-Dial lamp socket RCA VICTOR DIVISION OF RADIO CORPORATION OF AM

14、ERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 238-C 9SX-I To -8 T3 Ca. T 6A8 .0l QI 6K7 - CI I gr , 3-I 1 N / T2 loa C3 25Z6 IMeg vwv lo;it ( .a ( fI00A i T6 00000 r- UNFD MFD -01 I.F. 456 K.G. r 142.5A 22.5 450 0-1) 61 25Z6 251.6 6K7 6A8 607 Alignment Procedure Output Meter Alignment.-

15、Connect the meter across the voice coil, :nul turn the receiver volume control to maximum. Test-Oscillator.-For all alignment operations, connect the low side M the test -oscillator to the receiver chassis through .01 mfd., and keep the output as low as possible to avoid a -v -c action. igON OFF SWI

16、TCH r VOLUME CONTROL STATION SELECTOR 6250 K C C2 6000 K.C. cl C34 1720 K.0 sLF. 456 K.C, ANTENNA LEAD tST-DET.,OSC. C:j-BAND SELECTOR ROWER CORD 6A8 6K7 6Q7 25L6 Bottom -view of tube sockets 2ND DET. A.V.C. IST- q.F. a Steps Connect the high side of test- oscillator to- Tune test-osc. to- Turn radi

17、o dial to- Adjust the follow - ing for max. peak output- 1 617 I -F grid cap, in series with .01 mfd. 456 kc Quiet point between 1,650-1,720 kc, with range switch at broadcast position (counter- clockwise from rear). Two trimmers on 2nd I -F trans. 2 6A8 1st-Det. grid cap, in series with .01 mfd. 45

18、6 kc Two trimmers on 1st I -F trans: 3 Antenna Term. on antenna trans., in series with 400 ohms. 6,250 kc Max. clockwise (out of mesh) B band C2 (osc. gang trimmer)* 4 6,000 kc Resonance on 6,000 kc signal C1 (ant. gang trimmer)* 5 Antenna Term. on antenna trans., in series with 90 mmf. 1,720 kc Max

19、. clockwise (out of mesh) C3 1,500 kc Resonance on 1,500 kc signal. C4 * U e minimum capacity peak if two peaks can be obtained. * A ter this adjustment, check for image by leaving test oscillator at 6,000 kc, and shifting receiver dial to 5,088 kc, where a weaker signal should be received. Power -S

20、upply Polarity.-For operation on d -c, the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a -c, reversal of the plug may reduce hum. Resistor in Power Cord.-The power cord contains a resistor which becomes warm during operation. Ant

21、enna.-The set is equipped with length of antenna wire. Do 25Z6 unt connect the antenna to ground. If an outdoor antenna is used, it should not be longer than 100 feet, including lead-in. If it is longer, connect a 100 to 200 mini, capacitor in series with the lead-in. 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN