RCA-Victor-Co-Inc-BT-40 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS l-DET)5C. bottom view of TUBE SOCKETS ZZO,oof CZ2 _L 0.1 -r Mro. IN5GT IF IH5GT Z“DET-A F-A,VC 1T5GT OUTPUT C7 ce: .01 56MM - MFD. 1-4 LI 1 F Jtr Al 11 CTmTT es-Nj L4 Cep GO MKlR f R2 41.000 JL blue L4. Jl5 )o Ics a io RCA BP-55, BP-56, BP-85 : 1 CIO =T=

2、-05 -L fd. R4 G.8 MEG. R5 -A/V/ 2.2 MEG. wizeG. RECT. 4=0 X loo - MMF RI3 meg. VOL. control R8 ; Z.2 MEe. ?TERY Switch RH3ISTOR POWER CORO IN MODELS USIHS 35E5GT RECT. DRAWN IN POS*l TOS.*1 - AC.-DC. POS2 -EATT.CURR. SAVER P0S.*3 -BATX MAX. OUTPUT ME SETS HWE CONNECTIONS SHOWN DOTTW AMD NO CONNECTIO

3、N MARKED To SWITCH gt R9. Ci I.P. 455 KC. To 1T5 C5 1 A7 157 DET.$OSC. z +1.4V. 82V. 1N5G I.F. AMPL. SrI I.F. TRANS. W III II R 1 a % C2 14n GO GB,o ( O - OSC. COI L J Znn.I.F C3 m 17 C4 455 KC OSC. LOIL O 3 TUBE ANO TRIMMER LOCATIONS POWER OUTPUT Undistorted 0.10 watt Maximum 0.21 watt LOUDSPEAKER

4、Type Voice -coil Impedance 4 -inch permanent -magnet dynamic 2 ohms at 400 cycles Height Width Depth Cabinet Dimensions (inches) 6* 9* 4-11/16 Chassis Base Dimensions (inches) 1* 811 31 Over-all Chassis Height 511 inches Weight-Shipping weight 61 pounds Net weight 41 pounds Tuning Drive Ratio 11 to

5、1 Zwo I.F. TRANS. 1H5G 1 C5G OUTPUT %2 V. tv 3 1 2.2 MFG. , f500,00 VOLUME CONTROL -A WHITE Schematic Circuit Diagram 2.2 MEG. l r BROWN 8T-40 RC -408 P- 84589-o 8MFD= fIL. +A -g BROWN VFLLOW 1. V 420A. VOLTAGE DROP ACROSS RESISTOR T.SV o ITCH EST. SWITCH f- ori VOL. OL +8 FtED 90V. RCA VICTOR DIVIS

6、ION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 457-C BT)40 Alignment Procedure Output Meter Alignment.-If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. Test-oscillator.-For all alignment operat

7、ions, 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. For additional details, refer to booklet RCA Victor Receiver Alignment. Pre-setting Dial.-With gang condenser in full mesh, the pointer should be horizontal. BA

8、TTERY CABLE y PLUG SOCKET BLUE - ANT. BLACK-ONO- 1 92 VOLT- 9 0 VO LT A-8 PACK BATTERY A -B PACK BATTERY Steps Connect the high side of teat- oscillator to- Tune teat-oec. to- Turn radio dial to- Adjust the follow - ing for max. peak output- 1 1A7G 1st-Det. grid cap, in series with .01 mid. 455 kc Q

9、uiet point at 1,600 kc end of dial Cl, C2, CS, C4 (1st and 2nd I -F transformers) 2 Antenna lead (blue) in series with 100 rnmfd. 1,720 kc Full clockwise (out of mesh) C5 (oscillator) 3 1,500 kc Resonance on 1,500 kc signal C6 (antenna) BATTERY TERMINALS BLUE - ANT. BLACK- GND. BATTERY CABLE BROWN L

10、EAD YELLOW LEAD RED LEAD +90 wurrE LEAD JUMPER -_ SOCKET s +45 SOCKET B -BATTERY 13 BATTERY -45 VOLTS 45 VOLTS SEPARATE AND.B BATTERIES Installation of Batteries Replacement Parts mine factory -tested parts, which are readily identified and may be purchased from authorized dealers. STOCK No. DESCRIP

11、TION STOCK No. DESCRIPTION 11591 Button-Plug button for chassis 14076 Resistor -820 ohms, watt 13057 Capacitor -60 mmfd. 13715 Resistor -68,000 ohms, watt 12488 Capacitor -250 mmfd. 12264 Resistor -220,000 ohms, watt 12952 Capacitor -300 mmfd. 13730 Resistor -1 meg., watt 5107 Capacitor-.0025 mfd. 1

12、2679 Resistor -2.2 mee., watt 4937 Capacitor-.01 mfd. 13601 Resistor -10 meg., watt 32787 Capacitor-.05 mfd. 33061 Shaft-Tuning knob drive shaft 4839 Capacitor -0.1 mid. 32595 Shield-Tube shield-less cap 32187 Capacitor-Electrolytic, 8 mid. 32537 Socket-Tube socket 32572 Coil-Antenna coil 33058 Spea

13、ker complete (39128-1) 33055 Coil-Oscillator coil 30585 Spring-Drive cord tension spring 33060 Condenser -2 -gang tuning 32667 Spring-Retaining spring for knobs or drive drum 32634 33310 32946 Cord-Drive cord Dial-Glass dial scale Drum-Variable condenser drive drum 33056 33057 Transformer-First i -f

14、 transformer Transformer-Second i -f transformer 32571 Knob-Tan volume or tuning knob 33062 Transformer-Output transformer 30550 Plug -4 -prong male plug for battery cable 33059 Volume control and switch Off -Center Cone: In many cases, an off -center original cone may be quickly centered by bending the sup- port webs of the speaker housing in the required direction. 收音机爱 好者资料库 RadioFans.CN