RCA-Victor-Co-Inc-85T2 电路原理图.pdf

《RCA-Victor-Co-Inc-85T2 电路原理图.pdf》由会员分享，可在线阅读，更多相关《RCA-Victor-Co-Inc-85T2 电路原理图.pdf（4页珍藏版）》请在收音机爱好者资料库上搜索。

1、PAGE 3 3 3-B MODELS85T 8. 85T2 Five -Tube, Single -Band, A -C, Superheterodyne Receiver MODEL 8512 Model 85T Electrical SpeciAcations Frequency Range530-1,720 kc R -F Alignment Frequency 1,500 kc (osc., ant.) Intermediate Frequency 460 kc RADICYTRON COMPLEMENT (3) RCA -75 Second Det., A -F Amp. and

2、A.V.C. (1) RCA -6A7First Detector-Oscillator (4) RCA -41 Audio Power Amplifier (2) RCA -6D6 Intermediate Amplifier(5) RCA -80 Full -Wave Rectifier Pilot Lamp (1) Mazda No. 46, 6.3 volts, 0.25 ampere POWER SUPPLY RATINGS Rating A 105.125 volts, 50.60 cycles, 55 watts Rating B 105.125 volts, 25.60 cyc

3、les, 60 watts Rating C 100.125/200-250 volts, 50.60 cycles, 55 watts POWER OUTPUT RATING LOUDSPEAKER Undistorted 1.0 wattsType Electrodynamic Voice Coil ImpeaanceMaximum 2.5 watts S (84011-3) 3.1- / (84011.6) 2.7- ohms at 400 cycles (84128-1)2.6 - (84128-2) 5- 5,4-732 C5-0SC 1500 N.C. C1 -ANT. 1600

4、K.C. TO TEAM. SEt.ADJ L6 46014.C. DET gosc. -Radiotron, Coil, and Trimmer Locations Precautionary Lead Dresa-(1) The green RCA -75grid cap lead should be twisted with the yellow lead to the volume control to maintain proper position for prevention of hum pickup.(2) The green lead from oscillator coi

5、l L3 to tun- ing condenser C4 should be kept free from chassis.(3) Keep power cord and red primary leads of power transformer away from the green RCA -41 grid lead to prevent hum pickup. (4) Red lead from electrolytic capacitor C19 to RCA -80 socket should be dressed between power transformer and ch

6、assis apron to prevent hum pickup. Alignment Procedure Calibrate the tuning dial by adjusting dial pointer to the center horizontal line with the gang tuning -condenser plates in full -mesh position. This is a screw -driver adjustment. STEP CONNECT HIM SIDE OF TEST OSC. TO - TUNE TEST OSC TO - TURN

7、RADIO DIAL TO ADJUST THE FOLLOWING FOR MAX. OUTPUT 1 I -F Grid In series with 0.01 mfd 480 Kc Quiet point near 600 Xc L7 2nd I -F Trans. 2 1st Det. Grid in series with 0.0 mid L6L5 1st I -F Trans. 3 Antenna in series with 200Imirti 1500 Kc 1500 - -Kc C5C1 Osc.Ant. Use liaximat capacity peak. Tighten

8、 capacitor C6 on bottom of gang (under chassis) for maximum capacity before adjusting C5. 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 PAGE 334-B 85T ITN. .-1,C.G. 1 G :1 -1 74V.; 1; ,1 6.3V._i 1- (.1.3e) ,L A.C.r -4-01Y. I 1 -0.2V. I 11 9II 1 r

9、 FRI. ADJ. 85T2 VOLTAGES 5% HIGHER -Radiotron Socket Voltages, Coil, and Trimmer Locations Measured at 115 volts, 60 -cycle supply-Tuned to approximately 1,000 kc (Broadcast)- No signal being received-Volume control minimum Note: Two voltage values are shown forsome read- ings. The value shown in pa

10、rentheses with asterisk () indicates operating conditions without voltmeter loading. MODEL 85T2 Model 85T2 is an upright table model employing a chassis similar to Model 85T. Either of two loudspeakers may be employed and are readily iden- tified by the numbers stamped on them -84128-1 or 84128-2. T

11、he speaker cable connects to the chassis as follows: Brown lead (L11) to F terminal of tube No. 5, RCA -80, to which the red lead from the capacitor pack connects.Black- brdwn lead (L1 -T2) to SG terminal of tube No. 4, RCA -41. Black lead (T2) to P terminal of tube No. 4, RCA -41. MOTTOMla. 14I I C

12、ONNECTIONS TRANS. CONNECTIONS SLACK a210/. CAP. PACK CONNECTIONS .?Tp.ort IOLA( M./ .TIRANE, CONNECTIONS 收音机爱 好者资料库 RadioFans.CN PAGE 335-B 85T 8t 85T2 Resistance values for speaker 84128-1 are: Field coil(L11), 1,300 ohms; Voice coil (L9), 2.3 ohms; Hum neut. coil (L10), 0.15 ohm; Output trans- for

13、mer (T2) primai-y, 470 ohms -secondary, 0.35 ohm; Voice -coil impedance, 2.6 ohms at 400 cycles. Resistance values for speaker 84128-2 are: Field coil (L11), 1,300 ohms; Voice coil (L9), 4.2 ohms; Hum neut. coil (L10), 0.23 ohm; Output trans- former (T2) primary, 610 ohms -secondary, 0.5 ohm; voice

14、-coil impedance, 5 ohms at 400 cycles. REPLACEMENT PARTS Insist on genuine Factory tested parts, which are readily identified and may be purchased horn authorized dealers STOCK No. DESCRIPTION STOCK o. DESCRIPTION RECEIVER ASSEMBLIES14638 Shaft-Station selector knob shaft and pulley 12008Shield-Firs

15、t I. F. transformer shield 14663Belt-Variable condenser drive belt12408Shield-Second I. F. transformer shield 14632Bracket-Dial mounting bracket11266Shield-Radiotron shield 12118Cap-Grid contact cap14668Socket-Dial lamp socket 12405Capacitor -47 Mmfd. (C10)4794Socket -4 -contact 80 Radiotron socket

16、14262Capacitor -110 Mmfd. (C8 C9)4786 Socket -6 -contact GDP, 41 or 75 Radiotron socket 12724Capacitor -120 Mmfd. (C7)4787Socket -7 -contact 6A7 Radiotron socket 12406Capacitor -180 Mmfd. (C11)14697Spring-Idler pulley tension spring 12635Capacitor -1,000 Mmfd. (C13)12007 Spring-Retaining spring for

17、core, Stock No. 12006 5005Capacitor-.0035 Mfd. (C14)14376 Transformer-First I. F. transformer (L5, L6, C8, C9) 4838Capacitor-.005 Mfd. (C16)14642Transformer-Second I. F. transformer(L7, L8, C10, 4870Capacitor-.025 Mfd. (C12)C11) 4886Capacitor-.05 Mfd. (C15)14666 Transformer-Power transformer, 105-12

18、5 volts,50-80 4841Capacitor -0.1 Mfd. (C9)cycle (T1) 12484Capacitor -0.25 Mfd. (C17)14667 Transformer-Power transformer, 105-125 volts,25-60 14669Capacitor Pack-Comprising one 8-Mfd. and two 5-Mfd.cycle (T1) sections (C18, C19, C20)14668 Transformer-Power transformer, 100-125/200-250 volts, 14670Coi

19、l-Antenna .coil (L1, L2) 50-60 cycle (Ti) 14257Coil-Oscillator coil (L3, L4)14645 Volume Control and power switch (R5, Si) 14662Condenser -2 -gang variable condenser (C1, C2, C4, C5, 12008Core- CO) Adjustable core and stud for I. F. transformer REPRODUCER ASSEMBLIES 14665Dial-Station selector dial 1

20、4635Indicator-Station selector indicator pointer 14678 Cone-Reproducer cone (L9) for speaker marked 84011-3 5228Lamp-Dial lamp 14939 Cone-Reproducer cone (L9) for speaker marked 84011-6 14638Pulley-Idler pulley-less spring14675 Reproducer complete (84011-3) 14664Pulley-Variable condenser drive pulle

21、y-located on con- denser shaft 14677Transformer - Outputtransformer (T2)forspeaker marked 84011-3 14671Resistor -33 Ohms-Carbon type, i watt (R9)14940 Transformer-Outputtransformer (T2)forspeaker 11670Resistor -330 Ohms-Carbon type, 1 watt (R10) marked 84011-6 8067Resistor -39,000 Ohms-Carbon type,w

22、att (R9)i:35:150Field coil for speaker marked N401 15 12333Resistor -68,000 Ohms-Carbon type,watt (121) 11172Resistor -470,000 Ohms-Carbon type, i watt (R8) MISCELLANEOUS ASSEMBLIES 5035Resistor -560,000 Ohms-Carbon type, / watt (R7) 11826Resistor2.2 Megohm-Carbon type, i watt (R2, R6) 14654 Escutch

23、eon-Station selector escutcheon and crystal 13732Resistor -10 Megohm-Carbon type, * watt (R4) 12673 Knob-Station selector or volume control knob 5129Ring-Radiotron shield ring14287 Screw-Chassis mounting screw and washer 4389Screw-No. 6-32z3/16 headless set screw for pulley, Stock No. 14639 4119Scre

24、w-No. 8-32 : ftheadless set screw for knob, Stock No. 12673 Stock No. SUBSTITUTE PARTS - MODEL 85T2 Description 30460Belt -Flat, phosphor -bronze drive belt for indicator pointer 30469Belt -Flat, endless drive belt for tuning condenser 5119Connector-3-contact female connector for speaker cable 30459

25、Pulley-Indicator-pointer pulley and shaft 30465Pulley-Drive-belt intermediate pulley -located on side of drive opposite idler pulley 30468Pulley-Variable-condenser drive pulley -located on condenser shaft 30340Retainer-Indicator-pulley or drive -belt intermediate pulley retainer 30463Screw -No. 4-40

26、 x 3/16 in. binder -head screw to fasten indicator drive belt 30471Cone -Reproducer cone (L9) (for Spkr. 84128-2) 30687Cone -Reproducer cone (L9) (for Spkr. 84128-1) 5118Connector-3-contact male connector (for Spkr. 84128-2) 30470Reproducer complete (Marked 84128-2) 30472Transformer -Output transformer (T2) (for Spkr. 84128-2) 30686Transformer -Output transformer (T2) (for Spkr. 84128-1) Stock Nos. 14663, 14664, 14676, 14939, 14675, 14677, and 14940 are not used in Model 85T2. 收音机爱 好者资料库 RadioFans.CN