RCA-Victor-Co-Inc-QB5 电路原理图.pdf

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1、Specifications FREQUENCY RANGES Standard Broadcast (A Band) 540-1,720 kc (555-174 m) Medium Wave (B Band) 2.3-7.1 me (130-42.2 m) Short Wave (C Band) 7.1-22 me (42.2-13.6 m) INTERMEDIATE FREQUENCY 455 kc BATTERIES REQUIRED 1-1.5 Volt A Battery; 2-45 Volt Or : One 171-90 Volt battery pack. Batteries

2、BATTERY DRAIN A 25 amp. B 12.50 ma. POWER OUTPUT Undistorted 20 watt Maximum 56 war. LOUDSPEAKER (RL -81B-2) Type 5 -inch permanent -magnet dynamic Voice -coil impedance 4 ohms at 400 cycles - 1500 6o0 9.5 1000 ) 6100 I I 6 DRIVE CORD DRUM SHOWN WITH GANG AT MAX. CAPACITY 2 TURNS 0 MODEL Q PAGE B5 3

3、7-C MODEL QB5-Identical with the Model Q12, except for 11/2 -volt battery opera- tion. Convertible to AC operation through RCA Victor Power Supply Unit CV112-X. BLUE (ANTENNA) BLACK -. (GROUND) ADAPTER CABLE (2) SEPARATE A &B BATTERIES L8-B-OSC. 2,5 MC. -.r/ti RC -563A and CV -112X RECEIVER, PHONOJA

4、CK i fj f- BATTERY CABLE .-AP CHANGER PLUG MUST BE IN THIS POSITION SWITCH 234V.117V. C61026-0-B-KACNT. %C.11 C 25- C ANT. 21.5 MC. C24 .*B 05C. - 6100 KC. A -B PAC K BATTERY C21 A ANT. 1500 KC. 9.5 MC+B ) 1500 KCSC. A -C POWER UNIT MODEL CV-I12g (3) A -C POWER SUPPLY METAL BASE 2ND .I.F TUBE TRANS.

5、 tree SHIeLD I LH -L12 L13 -L14 455 KC. 455 KC. Replacement Parts Insist on genuine factory -tested parts, which are readily Identified and may be purchased from authorized dealers. STIOoCK DESCRIPTION STOCK DESCRIPTION CHASSIS ASSEMBLIES 30992 Resistor -10 meg., watt 36897 Shaft-Tuning knob shaft 3

6、2548 Capacitor-Electrolytic, comprising 1 section of 33742 Socket-Phono input socket 12 mfd., 150 volts, and 1 section of 20 mfd., 31251 Socket-Tube socket 150 volts 31418 Spring-Drive cord spring 32830 Capacitor-Mica trimmer, 2 sections of 2-20 mmfd. each 31261 Spring-Retaining spring for C band os

7、cil- lator coil core and stud 31292 Capacitor-Mica trimmer comprising 2 sections 38297 Switch-Range switch of 3-30 mmfd. 38300 Transformer-Audio transformer 36176 Capacitor -33 mmfd. 35636 Transformer-First I.F. transformer 30904 Capacitor -100 mmfd., mica 36122 Transformer-Second I.F. transformer 1

8、2720 Capacitor -100 mmfd., moulded 33726 Washer-C washer for tuning shaft 12694 Capacitor -220 mmfd. 12537 Capacitor -560 mmfd. 12951 Capacitor -2,200 mmfd. SPEAKER ASSEMBLIES 30304 Capacitor -4,700 mmfd. (RL81B2) 37102 Capacitor-.001 mfd. 34459 Capacitor-.0025 mfd. 35570 Cone-Cone complete with voi

9、ce coil 4838 Capacitor -.005 mfd. 5148 Capacitor-.007 mfd. MISCELLANEOUS ASSEMBLIES 4937 Capacitor-.01 mfd. 4870 Capacitor-.025 mfd. 36890 Clamp-Dial clamp-L.H. 4839 Capacitor -0.1 mfd. 36891 Clamp-Dial clamp-R.H 32821 Coil-Antenna coil 36103 Decalcomania-OFF-Volume decal 32148 Coil-Oscillator coil-

10、A band 35480 Decalcomania-Range switch decal 33784 Coil-Oscillator coil-B band 38328 Dial-Glass dial scale 38295 Coil-Oscillator coil-C band 36886 Knob-Range switch or volume control knob. 38287 Condenser-Variable tuning condenser 36722 Knob-Tuning knob 38406 Control-Volume control and power switch.

11、 30900 Spring-Retaining spring for knobs 32634 Cord-Drive cord (approx. 50 -in. overall length) 38296 Core-Adjustable core and stud for C band oscillator coil CV -112X AC POWER UNIT 32713 Core-Adjustable core and stud for oscillator coil 37068 Indicator-Station selector indicator 4886 Capacitor-.05

12、mfd.-400 volts (C1) 38288 Plate-Dial back plate complete with pulleys and bracket-less dial 30873 Capacitor-Electrolytic, 2 sections 20 mfd., 150 volts 30568 Plug -4 -prong male plug for battery cable. 36553 Capacitor-Electrolytic, 1,000 mfd., 3 volts 36230 Pulley-Drive, cord pulley 36547 Coil-High

13、voltage choke coil -200 ohms 36237 Pulley-Tuning condenser pulley 36548 Coil-Low voltage choke coil-marked 1B84. 30498 Resistor -390 ohms, watt 36549 Coil-Low voltage choke coil-marked 1B85. 30146 Resistor -4,700 ohms, i watt 38353 Plug -2 -contact filament voltage changing plug 12412 Resistor -47,0

14、00 ohms, 3 watt 36551 Rectifier -1.5 volt rectifier 13715 Resistor -68,000 ohms, watt 36552 Socket -4 -contact power output socket 14138 Resistor -68,000 ohms, watt 18008 Socket-Tube socket 13730 Resistor -1 meg., watt 36550 Switch-Power cord switch 30649 Resistor -2.2 meg., watt 33491 Switch-Voltag

15、e change switch 14752 Resistor -2.7 meg., watt 38393 Transformer-Power transformer -110-220 volts, 30271 Resistor -4.7 meg., i watt 50-60 de 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 PACE 88-C QB-5, CV-II2X o Jr. d 1 1/ 1/ ll1111 4 y N n d C

16、i /1 .b/ r N N D f 4 x r0N QIj gu 0) 2- u) tt C A 3.7n. A PRI. 36 n 1.5 A 4.3n LI tp ANT. TCI GRID 7% (Goo KC) ,r A ces 5-30 Le 2Q C26 3-30 C23 2-20 E 2O0 LS FC6 Alignment Procedure Test Oscillator. -For all alignment operations, connect the low side of the test oscillator to the receiver chassis an

17、d keep the output as low as possible to avoid AVC action. Calibration Scale. -The glass tuning dial may be easily removed from the cabinet and temporarily attached to the dial hacking plate for quick reference during alignment. The dial backing plate has marks corresponding to alignment frequencies

18、as shown in accompany- ing sketch. Before alignment, set the dial pointer so that, with the gang in full mesh, the pointer is 1/16 -in. to the left of the left-hand mark on the dial backing plate. Steps Connect high side of test osc. to- Tune test osc. to- Turn radio dial to- Adjust fouowing for max

19、. peak output - 1 IF grid cap in series .01 mfd.th 455 kc A Band Quiet Point at High Freq. End L14 and L13 (2nd IF Trans.) 2 1st det. grid cap in series with O1 mfd. L12 and Lllt (1st IF Trans.) 3 Antenna Lead in series with 200 mmf. 1,500 kc 1,500 kc mark Peak C23 (osc.) and C21 (ant.) 4 600 kc 600

20、 kc mark L6 (osc.) 5 Repeat steps 3 and 4. 6 Antenna Lead in series with 300 ohms 6.1 me 6.1 me mark Peak C24 (osc.)* and C26 (ant.) 7 2.5 me 600 kc mark L8 (osc.) * 8 Repeat steps 6 and 7. 9 9.5 me 9.5 me mark L10 (osc.) Rock Gang 21.5 me 21.5 me mark C210 (Ga Rock Gang *Use minimum capaci y peak i

21、f two peaks can be obtained. *Rock gang slightly or peak output. tDo not readjust L14 or L13 when test oscillator is applied to 1A7 -GT grid. CbNV. GAIN I .4% 1.3% 90%(600-455KC.F 4S5 KC. 110 x (455 KC) - 20%(4o0,v) MEASURED WITH 1.S V. FIXED Suss- -Sv (60oM -I1.5V(N300K) -3V. (2.31,K) -7V. (7)4C) -

22、3.7V 17.14C) E.T. (22 MC) C21 C2 2-20 13-490 $2 REAR 0 o clCa 4700.4r R2 68 M REO 0 If 20 C22 IA-/- GT IsT DET. $ 05C. 1N5 -GT I.F. AMP IST. I.F. TRANS V.F C9 100 45V. RI I- MEG. 4100 C5 13-490 04 o I0 LII1.1122 100 7.sn ton C12 ? .025 I R3 I 2.1 MEG. I RANGE SWITCH VIEWED FROM FRONT AND SHOWN IN A

23、BAND (MAX. COUNTER- CLOCKWISE) POSITION BOTTOM VIEW OF TUBE SOCKETS. A LI3, L4 05 4.7 MEG 2 RG VOL.CONTR. I MEG. L I.sv. +1 FOR IH5-GT 2- DET. A.F 8 A.V.C. R7 I MES C16 C27 II 1 .I I .001 O R8 10 MG. Flu 20 BIAS / GAIN DATA / / OSCILLOGRAPH CONKS VERTICALHI TO THIS POINT, VERTICALO TO CHASSIS. CATHO

24、DE CURRENTS (I) 1A7GT - 1.10 MA. (2) INSGT - - 1.23 MA. (3) IHSGT - - - .O2 MA. (4) 3(256T- -9.52 MA. TOTAL - - -. I2.5 MA. PHONO. JACK IR13 IOMEG. VOLTAGES SHOULD HOLD WITHIN t 20% WITH RATED BATTERY SUPPLY. BATTERY CONNECTIONS A four wire cable with plug is provided for making connection to a plug

25、-in 11-90 volt A -B battery pack such as the Eveready A B 748 or equivalent. When separate batteries are used, an adapter extension cable such as the MI -8128 is necessary and may be purchased from your dealer. C18 .0025 i R9 2.2 MEG. 3O% (400,v) MEASURED WITH RCA RIDER CHANALYST 3Q5 -GT OUTPUT -42V PLUG TERM. (REAR) V 1E W R10 390 C20 BLUE IZY -1- 92267 -2 GIBS (RC 553 A) Es MEASURED WITH CHANALYST OR VOLTOHMYST 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN