FOREWORD For the past twenty five years, Nippon Elec- tric Co., Ltd. has contributed much of its effort in enhancing the status of Electron Tube Industry in Japan to one of the highest level in the world. A significant attitude which the Nippon Elec- tric has been holding for years passed and years to come is the "Quality First." The NEC Transmitting Tubes have been noted for its Long life, Excellent performance and Good uniformity. A substantial part of NEC Transmitting Tubes is provided with good interchangeability with American tubes such as R. C. A., G. E., Western Electric and Eimac, while some of them are inter- changeable with European tube types like S. T. C., Mullard and Philips. The corresponding types are shown side by side by our own designations. We are ready to supply these tubes, strictly in accordance with military specifications if the customers so desire upon request. There are other electron tubes of our manu- facture like Microwave Tubes, Cathode Ray Tubes, Receiving, Reliable or Repeater Tubes and Special Purpose Tubes ; the catalogs in English covering these tubes are also available from Foreign Trade Division, Nippon Electric Company, Ltd.
2 CONTENTS
Page Page Type 9T71 Power Triode (Water Cooled, Type 4B13 Beam Power Amplifier 20 Grounded-Grid Type) 4 Type 2B32 Push-Pull R-F Beam Power Type 8T92R Power Triode (Forced-Air Cooled) • • • 4 Amplifier 22 Type 8T71R Power Triode (Forced-Air Cooled) 6 Type 2B29 Push-Pull R-F Beam Power Type 4F15R Radial Beam Power Tetrode Amplifier 22 (Forced-Air Cooled) 6 Type 2B52 Push-Pull R-F Beam Power Type 6F50R Radial Beam Power Tetrode Amplifier 24 (Forced-Air Cooled) 8 Type 2B94 Push-Pull R-F Beam Power Type 8F66R VHF Beam Power Tetrode Amplifier 24 (Forced-Air Cooled) 8 Type 2B46 VHF Beam Power Amplifier 26 Type 4T16 Low-Mu Power Triode 10 Type 2E26 Beam Power Tetrode 26 Type 4T17 High-Mu Power Triode 10 Type UY-807 Beam Power Amplifier 28 Type 5T30 Low-Mu Power Triode 12 Type 2P22 Power Pentode 28 Type 5T33 Power Triode 12 Type 2H66 Half-Wave Mercury-Vapor Type 7T40 High-Mu Power Triode Rectifier 30 (Forced-Air Cooled) 14 Type 4H72 Half-Wave Mercury-Vapor Type UV-211A Power Triode 14 Rectifier 30 Type TC-517-A R-F Power Amplifier, Type 4H73 Half-Wave Mercury-Vapor Oscillator 16 Rectifier 32 Type TC-522-A R-F Power Amplifier, Type 5H69A Half-Wave Mercury-Vapor Oscillator 16 Rectifier 32 Type 5F22A Radial Beam Power Tetrode Type 7H57 Half-Wave Mercury-Vapor (Forced-Air Cooled) 18 Rectifier 34 Type 5F23A Radial Beam Power Tetrode Type 2H28 Half-Wave .Inert-Gas-Filled (Forced-Air Cooled) 18 Rectifier 34 Type 7F25A Radial Beam Power Tetrode Type 4H32 Half-Wave Inert-Gas Filled (Forced-Air Cooled) 20 Rectifier 34
3 POWER TRIODE NBC 9T71 (Water Cooled, Grounded-Grid Type) EUROPEAN TYPE AMERICAN TYPE 5770 Filament, Multistrand Thoriated-Tungsten Excitation Single phase A.0 or D.0 Voltage 11 Volts Current 285 Amperes Starting Current 570 Amperes Amplification Factor 39 Direct Interelectrode Capacitances (Approx.): Grid to Plate 53 pF Grid to Filament 89 pF Plate to Filament 1.2 pF. Plate Voltage (D.C) 17,000 Volts max. Plate Dissipation 50,000 Watts max. Cooling air flow, 75l/min for the maximum plate dissipation must be delivered before the application of any voltages. Air Flow to Filament Seals 0.3 m3/min
NEC 8T92R POWER TRIODE (Forced-Air Cooled)
EUROPEAN TYPE BR-175 Filament Tungsten, Two-unit Type AMERICAN TYPE 892-R Excitation 1 ¢ A.C., 2 ~ A.C. or D.C. Voltage per unit 11 Volts Current per unit ~ 60 Amperes Note : When asingle-phase or D-C supply is used, do not connect the two filament sections in parallel. Doing so will overheat common filament lead (Center tap terminal) and damage the tube.
Amplification Factor ~ 50 Transconductance 9,000 µMhos (for plate current of 1.0 Amp.) Direct Interelectrode Capacitances (Approx.): Grid to Plate 20 pF Grid to Filament 22 pF Plate to Filament 1.9 pF I Plate Voltage (D.C.) 12,000 Volts max. Plate Dissipation 6,000 Watts max. Cooling air flow, 20m3/min for the maximum plate dissipation, must be delivered before the application ') of any voltages. Note : The filament terminals are not identical with those of Ame- rican Type.
4 N~'C TRANSMITTING TUBE HARACTERISTIC DAT'
Unit mm
9T71 v Constant Current Characteristics — 7 90o II Ef = l I V A.C.
900 1111- l0A ■■• ■— 700 ~I'_~~8 ~~~—~- 'I~1,~y 6 II~,`~~ - 5_ —~_ Terminal Connection ~y`i~~i~~~~_ ~~Ie~■- 500 ~3 1?r=s: 7I~ ~1~ ~~ _ ~1 4pA - 400 ~~ ~•~~~~~ r - 300 ~~ ~"~~=_. =is 200 ;`~.\`~~~il~~\~i ~ '=`=' ~ zo 00 ~0 100 ~,`-_'_\`\~ 100'—~`~~~`~
0 300 _■■■■'"~ ---144=1--- DOd 0 F-Filament G-Grid-Flange Terminal „"'■1 -115.5MA1E- SOOO P-Water-Cooled Plate Terminal 600 700
0 1 2 3 4 5 6 7 8 9 10 )1 12 13 14 15KV ~ / En -
Unit mm Iz I I i Filament II En-lo CFNLACTERISnLS Center-tap Filament _ Ec-I000V Terminal to Ef=22V Terminal +OOV SIN6LE-PNASE ESGITATION s ae ~. .~ soov w~ Terminal Connection i 500 f F FCT F aW~ ~~ rd I JOOY d 4
O _ 100V 2 ~~/ ~ ~~ ~ 0 1 1 J 4 5 6 7 IO PLATE KILOVOLT (Ee)
1 En- Ic GHARALTERISTIGS Efa22V u ` ' SINGLE-PHASE E%CITATION
.. _; R± ~~~_ AMPERESIIc) 1L _~,`\\,1,~
PLATE TUBE MOUNTING POSITION GRID ` AIR-COOLED ~~~! RADIATOR VERTICAL : Glass end up HORIZONTAL : Not advisable ~ ~` ~ n i 2 3 4 5 6 7 8 9 1 PLATE KILOVOLTS (En1
5 NEC 8T71R POWER TRIODE (Forced-Air Cooled)
EUROPEAN TYPE Filament, Multistrand Thoriated Tungsten: AMERICAN TYPE 5 6 71 Excitation Single Phase A.0 or D.0 Voltage 11 Volts Current 285 Amperes Starting Current 570 Amperes Amplification Factor 39 Direct Interelectrode Capacitances (Approx.): Grid to Plate 52 pF Grid to Filament 88 pF Plate to Filament 1.5 pF Plate Voltage (D.C) ~ 15,000 Volts max. Plate Dissipation I 25,000 Watts max. Cooling air flow, 65m~/min for the maximum plate dissipation, must be delivered before the application of any voltages. Air Flow To Filament Seals 0.3 ma/min
RADIAL BEAM POWER TETRODE (Force-Air Cooled) NEC 4F15R USEFUL AT FREQUENCY UP TO 500 Mc EUROPEAN TYPE QEL•1/150 AMERICAN TYPE 4 X 1 5 0 A Heater, for Unipotential Cathode Voltage (A.C. or D.C.) 6.0 Volts Current 2.6 Amperes Minimum Heating Time 30 sec. Mu-Factor Grid No.2 to Grid No.l 5 (for Grid No.2 Volts=300) Direct Interelectrode Capacitances (Approx.) Grid No.l to Plate 0.02 pF Grid No.l to cathode, grid No.2 and heater 15.5 pF Plate to cathode, grid No.2 and heater 4.5 pF Plate Voltage (D.C) 1250 Volts max. Plate Dissipation 150 Watts max. Grid No.2 (Screen) Voltage (D.C) 300 Volts max. Crid No.2 (Screen) Dissipation 12 Watts max. Cooling air flow, 0.2 m9 /min for the maximum plate dissipation, must be delivered before the application of any voltages.
6 NEC TRANSMITTING TUBE ,aHARACTERISTIC DATA
Unit mm
8T71R v Gonstarrt Current Characteristics 1000 , I Ef=IIVA.C. Terminal Connection 900 800 700 I t%%\~p a
U .~-- 5 600 ~1~_\ l 500 4,1~~lj~~~ a— 400 i 00001 300 200 zz' ~ —160~MAX.—~ F-Filament 1~~~~``~\'~ 100 ~``_~_ '` ~z ~■ l G-Grid-Flange Terminal 0 P-Radiator-Cooled ` `` `~~ N -100 s 41 Plate Terminal 0 0 -200 0 0 300 _=\` ~ Section A ~` 345 MIN. A -A' 400 -500 -600 ■ 700
0 1 2 3 4 5 6 7 8 9 10 11 Il 13 14 15RV 297~MAX. fb
Unit mm 4F15~ Bottom View of Constant Current Characteristics Socket Connection V Ecz=250VD.C. Er=6.OVA.G 60 K P IC
40 Icr 03A Ia=l.~ tl~ l 20 08 —r~~ ~- __~.. — u Q18 0 — _ En ~ 4Qv—' OUV 8 0 1000 ~4 1200V w ~~i Pin 1-Grid No. 2 Pin 2-Cathode -l0 ~ ,1 i.2 Pin 3-Heater ' ~ I Pin 4-Cathode - 01 40 Pin 5-Internal Connection ~' 005 Do Not Use Pin 6-Cathode -60 Pin 7-Heater Pin 8-Cathode Base Index -Grid No. 1 Plug -80 P-Plate Radiator Terminal G2-Grid No.2 (Ring)
7 NEC 6F50R RADIAL BEAM POWER TETRDDE (Forced-Air Cooled) EUROPEAN TYPE QBL•4/800 Filament, Thoriated Tungsten AMERICAN TYPE 4 X 5 0 0 A Voltage (A.C. or D.C.) 5.0 Volts Current 13.5 Amperes Mu-Factor, Grid No.2 to Grid No.l 6.2 Direct Interelectrode Capacitances (Approx.) Grid No.l to plate 0.05 pF Input 12.8 pF Output 5.6 pF Plate Voltage (D.C) 4000 Volts max. Plate Dissipation 500 Watts max. Grid No.2 (Screen) Voltage (D.C) 500 Volts max. Grid No.2 (Screen) Dissipation 30 Watts max. Cooling air flow 1 m3/min for the maximum plate dissipation must be delivered before the application of any voltages.
NEC 8F66R VHF BEAM POWER TETRODE (Forced-Air Cooled)
EUROPEAN TYPE CR 192 Filament, Thoriated Tungsten AMERICAN TYPE 61 6 6 Voltage (A.0 or D.C) 5 Volts Current 17? Amperes Minimum Heating Time 15 sec Mu-Factor Grid No.2 to Grid 1`:0.1 10 Direct Interelectrode Capacitances: Grid No.l to Plate 0.6 pF max. Grid No.l to Filament 44 pF Plate to Filament 0.08 pF max. Grid No.l to Grid No.2 60 pF Grid No.2 to Plate 23 pF Plate Voltage (D.C) 6600 Volts max. Plate Dissipation 10000 Watts max. Grid No.2 (Screen) Voltage (D.C) 2000 Volts max. Grid No.2 (Screen) Dissipation 400 Watts max. Cooling air flow, 10 m8/min for the maximum plate dissipation, must be delivered before the application of any voltages.
8 N~'C TRANSMITTING TUBE
Unit mm
6F50R Constant Current Characteristics Ecz=500VD.G Ef-5.OVA.C. Terminal Connection F Gz V 400 350 300 __ Ic2~A 08 r=0. A i •i 250 ~ '- Q5 ,•- ~~ -_a te - Ib=25A i 200 ~ ~~z Z2 150 - ."~ ~~~.ri~i 100 _ — 00 l0 f 50 Qi — 0~ - - Pin 1-Filament ~~' ~~ - - -0.~] 06 Eb -__ Pin 2-Grid No. 2 ,~, 0 III 62 4000V Pin 3-Filament 50 ~, , ~l P-Plate kadiator Ter- v~ 100 minal G,-Grid No. l (Center -150 Teminal on Fila- 200 ment End of Tube) G~-Grid No.2 (Ring) 500 1000 500 2000 2500 3000 3500 V
Unit mm 8F66R — Ib 152.¢ -~ Constant Current Characteristics ---- Icz 834-- ~ Fc=F1/~r Fri=1~nn1/Ar --- ICI Terminal Connection V b~_. _ ._,,, _„_ .___.,,_ -- i~ 500 y ~~ P ,, cr 3A ■ ?i. ~~. ~. ~~ -rt ■■ 2A 400 ~~~~, - ~~~ i ~~~_~_~ Id-16- ■■ 161.9**-0.8 14A 300,~~ ■~■~~ 1A ■■ 0 276MAX. N ?I 200 m Q5A __ 108=0 ~~ Q. - _ •- ~- 8A I 1~ 025A _— N ~`~~5~~ 6A ■ 30.7 F-Filament 10 i y 25A G,-Grid-No.l Term. ~~~ ar 4A Eby rtle=az (Adjacent to Fil. Posts) W ~ 2A -~aaa=r 2 3 01A 6 7kV G~-Grid-Nn.2 Termi- 1 IA nal (Between Grid 10 ~ - 'I~i 0.5A No. 1 &Grid No.2 O/A Term) P-Plate Terminal(Ring -20. of Radiator)
9 NEC 4fl6 LOW-MU POWER TRIODE EUROPEAN TYPE Filament, Thoriated Tungsten AMERICAN TYPE 100-TL Voltage (AC or DC) 5 Volts Current 6.3 Amperes Amplification Factor 14 Direct Interelectrode Capacitances (Approx.) Grid to Plate 2 PF Grid to Filament 2.3 pF Plate to Filament 0.4 pF Plate Voltage (D.C) 3000 Volts max. Plate Dissipation 100 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
NEC 4T17 HIGH-MU POWER TRIODE EUROPEAN TYPE TB 3/350 Filament, Thoriated Tungsten AMERICAN TYPE 100-TH Voltage (AC or DC) ~ 5 Volts Current I 6.3 Amperes Amplification Factor 38 Direct Interelectrode Capacitances (Approx.) Grid to Plate 2 pF Grid to Filament 3 pF Plate to Filament 0.3 pF Plate Voltage (D.C) 3000 Volts max. Plate Dissipation 100 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
V 10 NBC TRANSMITTING TUBE ;HARACTERISTIC DATA
Unit mm
Bottom View of 4T16 Socket Connection Constant Current Characteristics OAP tc'b`0 ,~50 0 (V ~ ~ ~30~ .ti5 —~ 1 ~ ~_ ~ ~ 00 X150 50 501 X00 20 40~ " ~~~_ ~ %~ ~ %" 30~ r ~~~ l ~ ►_—~i / 0 to'~Bq ~~ —~~~—_ r 20~ 1.6 I ~ ~~- =~ " ' 101 ------_-- 2 .,— ~ ~o ~i Pin 1-Filament I ae MIN. — 2 i ( ~~~ 1011 ~~~►i/i ~'~~ ~a6 Pin -No Connection --Eb _ Pin 3-No Connection -l0i _pOd Pin 4-Filament -_~ r ZOl Cap-Plate 0 T ~~~35 — Side-Grid -30~
Unit mm
Bottom View of It 41 1/ Socket Connection Ic (A (Al 22 a 25p l0 20 , i %/ 200 ~\ 09 1.8 150 08 1.6 ~~~~.,i!~/~., Q7 1.4 100 06 1.l ~~.~~~~~'~.'_'' 05 1. 0 04 ~16p ~\ Pin 1-Filament 03 0B ,/~ ~~ ~_ ~~~~ ~ Pin 2-No Connection ,~ ~ ~.~ '---100 0 Ol 0. imil./, Pin 3-No Connection 0 Pin 4-Filament 0.1 0 -100 Cap-Plate 0 1000 2000 3000 Side-Grid Eb(V)
11 NEC 5T30 LOW-MU POWER TRIODE EUROPEAN TYPE Filament, Thoriated Tungsten AMERICAN TYPE 450-TL Voltage (A.0 or D.C) ~ 7.5 Volts Current ~ 12 Amperes Amplification Factor ~ 18 Direct Interelectrode Capacitances (Approx.) Grid to Plate ~ 4.5 pF Grid to Filament 6.8 pF Plate to Filament 0.8 pF Plate Voltage (D.C) ~ 6000 Volts max. Plate Dissipation ; 450 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
NEC 5T33 POWER TRIODE EUROPEAN TYPE TY4-350 Filament, Thoriated Tungsten AMERICAN TYPE 8 3 3 - A Voltage (AC or DC) 10 Volts Current 10 Amperes Amplification Factor ~ 35 Direct Interelectrode Capacitances (Approx.) Grid to Plate 6.3 pF Grid to Filament 12.3 pF Plate to Filament 8.5 pF Plate Voltage (D.~) 3000 Volts max. Plate Dissipation 300 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
12 N.~'C TRANSMITTING TUBE
Unit mm
Bottom View of Socket Connection 5T30 Cons ant Gu~rent Characteristics .0 ~ ~n 600 ~~ dbA r ' 1 ~" 500 400 300 200 loo - -zsax~~i■~—~~i~i~ -■~■■~~■■ z- ~~!!~■~— ~ 'o ~ i ~i COC 100 --_ =::~~~~H A n ~ 0 Pin 1-Filament A -300 Pin 2-Filament B -400 II' Pin 3-Filament B '~ Pin 4-Filament A Cap-Plate Side-Grid
Unit mm
W/ ST33 V Const. Current P Characteristics Terminal Connection 500 Dpi tici ~~ G_ P ~ ; ~~ phi 400 ~ ~ ~ ~ oa.
Oti 300 ,~~ ~~ .' ~ ' ~~ ~ ~ %~i ~~ _ ' ~ 1 200 ~► ~ , U Ia=4A aJ
~ ~/ P-Plate 100 G—Grid 1 l5 F—Filament _ 0 l0 05
~ ib -100
0 S00 1000 1500 2000 2500 3000 .1500 V ES
13 NEC 7T40 HIGH-MU POWER TRIODE (Forced-Air Cooled)
EUROPEAN TYPE Filament, Thoriated Tungsten AMERICAN TYPE 1000—T Voltage (A.0 or D.C) 7.5 Volts Current 16 Amperes Amplification Factor Direct Interelectrode Capacitances (Approx.) Grid to Plate 5.1 pF Grid to Filament 9.3 pF Plate to Filament 0.5 pF Plate Voltage (D.C) 7500 Volts max. Plate Dissipation 1000 Watts max. Cooling air flow to Plate terminal, Grid terminal and Filament base, 0.06 m3 /min for maximum plate dissipations.
NEC UV-211A POWER TRIODE EUROPEAN TYPE 3B/850A AMERICAN TYPE 211 Voltage (A.C. or D.C.) Current Transconductance (for plate current of ?5 mA.) 3,800 µMhos Amplification Factor Direct Interelectrode Capacitances (Approx.) Grid to Plate 15 pF Grid to Filament Plate to Filament
14 NBC TRANSMITTING TUBE ~HARACTERISTIt DATA
iJnit mm
Bottom View of Socket Connection
7T40 700 600 ~5p 500 400 av — vrn _ .~ 300 "' 200 100 2A IA Pin 1-Filament A 0 QSA 4000 Pin 2-Filament B -100 0 Pin 3-Filament B 200 Pin 4-Filament A Cap-Plate Side-Grid
mm Unit ~F O P ii 'tip ~~ .ti 0 Bottom View of 25 Socket Connections
20 Filament ~~~~~~l5,~ Ic=Oi A Pate © ~ 1 R~~~~_ _ 10mA 15 ,~~~~ u,
Grid J 10~ Filament© i O
D
~ 5~
47.5MAX, ~ DTI 210 340 4~0 5u :il 7 i`i'r~0 90~ ~i O DIA. TUBE MOUNTING POSITION -5 VERTICAL: Base up or i , down HORIZONTAL: Not advis- ~o able PLATE VOLTS (Ebl 17.5
15 NE'C T(-517-A R-F POWER. AMPLIFIER, OSCILLATOR
EUROPEAN TYPE 4251-A Filament Thoriated Tungsten AMERICAN TYPE 251-A Voltage (A.C. or D.C.) 10 Volts Current 15 Amperes
Transconductance 4,000 µMhos (for plate current of 240 mA.) Amplification factor 10 Direct Interelectrode Capacitances (Approx.) Grid to Plate 8 pF Grid to Filament 10 pF Plate to Filament 6 pF Plate Voltage (D.C.) 3000 Volts max. Plate Dissipation 600 Volts max.
NEC TC-522-A R-F POWER AMPLIFIER, OSCILLATOR
EUROPEAN TYPE 4279-A Filament Thoriated Tungsten AMERICAN TYPE 279-A Voltage (A.C. or D.C.) 10 Volts Current 21 Amperes Transconductance (for plate current of 400 mA.) 6,000 µMhos Amplification factor 11 Direct Interelectrode Capacitances (Approx.) Grid to Plate 22 pF Grid to' Filament 19 pF Plate to Filament 12 pF Plate Voltage (D.C.) 3,000 Volts max. Plate Dissipation 1,000 Watts max.
16 N.~C TRANSMITTING TUBE
Unit mm ~4d~P
V 500 f .Q~ /~ ~ ~ a3p f / ' bP Terminal Connection 400 i ~' i~ ~~P~~~p, /; ~ ~ - ; ~ o~~OQpSP 300 ,; %;--,~ ~~~.~~ '~ ~~ ~ ~ 200 ~ ~~~ ~ ~ ~~ ~'2sq -~___- ..q i foo ZS-4 1q w 0 ~Sq -100 /q
afq TUBE MOUNTING -zoo TG - 517-A POSITION Constant Current VERTICAL: Filament 300 Characteristics Oq terminals up HORIZONTAL: Not advis- S00 1000 2500 able f000 1500 3000V Ee
Unit mm —24 99'~k- 24'-
v Terminal Connection 500 W _ ~ Ic~~~-0. 9 ~ 8 `~ ~ " " ;: - ~ sr p7 TC-522-A F _ _ F 400 -- do__ = Os Constant Current - ,'; __ __ - as_- _ __0.5Q4 Gharac#eristics 300
200 PLATE ff - ors ------~~ ~ ------TERMINAL ~5 ~
N 1p~ ® Ol +i --- -- O ------005_ Qs ~~------S00 1000 500 000 'i0 .~ 'OV
I6o 100 oq ``
TUBE MOUNTING 20 POSITION 30 VERTICAL: Filament terminals up '-0.15 HORIZONTAL: Not advis- able
17 NE'C 5F22A RADIAL BEAM POWER TETRODE (Forced-Air Cooled) EUROPEAN TYPE QB3.5/750 Filament, Thoriated Tungsten AMERICAN TYPE 4— 2 5 0 A Voltage (A.0 or D.C) 5 Volts Current 14 Amperes Transconductance 4,000 µ Mhos (for Ea=2500V, E~2=500 V, and Io=lOpmA) Mu-Factor, Grid No.2 to Grid No. 1 5.3 (for Ea=O, E~2=500V, and I~2=70mA) Direct Interelectrode Capacitances Grid No. l to Plate 0.14 pF max. Input (Approx.) 12.6 pF Output (Approx.) 4.4 pF. Plate Voltage (D.C) 4000 Volts max. Plate Dissipation 250 Watts max. Grid No.2 (Screen) Voltage (D.C) 600 Volts max. Grid No.2 (Screen) Dissipation 35 Watts max. Cooling air flow, 0.06 m3 /min for the max- imum plate dissipation, must be delivered before the application of any voltages.
NEC SF'l3A RADIAL BEAM POWER TETRODE (Forced-Air Cooled) EUROPEAN TYPE Filament Thoriated Tungsten AMERICAN TYPE 4-400A Voltage (A.0 or D.C) 5 Volts Current 14 Amperes Transconductance 4,000 µMhos (for Eo=2500V, E~2=500V, and Ia=l00mA) No.2 Grid No. 1 Mu Factor Crid to 5.3 (for Ea=O, E~2=500V, and I~~=70mA) Direct Interelectrode Capacitances Grid No. 1 to Plate 0.17 pF max. Input (Approx.) 12.6 pF Output (Approx.) 4.9 pF Plate Voltage (D.C) 4000 Volts max. Plate Dissipation 400 Watts max. Grid No.2 (Screen) Voltage (D.C) 600 Volts max. Grid No.2 (Screen) Dissipation 35 Watts max. Cooling air flow, 0.4 m3 /min for the maximum plate dissipation, must be delivered before the application of any voltages.
18 / V" N~'C TRANSMITTING TUBE
Bottom View of Socket Connection
G, 5F22A Eci ~~~~~u~~~~~ Ecz-500V cv) ..._ -- Icz Constant Current Ia 200 haracteristics ~~~ R~~ss.. ~ ,,, 2
~R~~ - a~Z l3~~R~~~~~rlxa~i 100 C ' "'~'" - — - ~~ [L~~~ ~ ~--~-- _---- _.-==--id by--- ~~~a~ ~~~ ~u~~c 1.0 -- —~ —~--=_-- ____~ asus Pin 1-Filament ~ii::~a==~~~s~~....~~~■~■...iceQI Pin 2-Grid No. 2 -100 Pin 3-Grid No. 1 Illi:~lllllllllllllilllillllll Pin 4-Grid No. 2 D Pin 5-Filament Z00 1000 2000 3000 Cap-Plate Eb (V)
I7nit mm
5~t0.15 Bottom View of Socket Connection ~i ~~~~~~~~ 5 F23 A Eci E 2=500V (V) --~--,~ ' ~~~~ Constant Curre == z ~~ 0.8A ~~ 200 ~~~~==~= =~G`. `1t8~2't ~~~~ Characteristi ~~~~.~~.~o.~ 00.6 ~tititi ~~~~s~~~za~:'~~y...~ ~_ ~z~~ 100 ~:'-icy_-~- ~==►~a~__, -=~~ 7!'1
1.0 a~~,c~u~~ c. Q8 0 \~II~~~-__ - - ~~ e=~ 0.6 Pin 1-Filament ~~~~r~~~~~~-- — 0.4 Yin 2-Grid No. 2 a2 0.1 Pin 3-Grid No. 1 -)OQ Pin 4-Grid No. 2 0 Pin 5-Filament 5~~~~~ 2000 Cap-Plate 7000 2000 3000 En(V)
19 NEC 7F25A RADIAL BEAM POWER TETRODE (Forced-Air Cooled)
EUROPEAN TYPE Filament, Thoriated Tungsten AMERICAN TYPE 4-1000A Voltage (A.0 or D.C) 7.5 Volts Current 21 Amperes Mu-Factor Grid No.2 to Grid No.l (for Ea=O, E~2=1000V, and I~R=75mA) 6.9 Transconductance µMhos (for Eb=2500V, E~z=500V, and Ib=300mA) 10,000 Direct Interelectrode Capacitances (Approx.) Grid No.l to plate 0.24 pF Input 27.2 pF Output 7.6 pF Plate Voltage (D.C) 6000 Volts max. Plate Dissipation 1000 Watts max. Grid No.2 (Screen) Voltage (D.C) 1000 Volts max. Grid No.2 (Screen) Dissipation 75 Watts max. Cooling air flow, 1.25 m3 /min for the maximum plate dissipation, must be delivered before the application of any voltages.
NEC 4613 BEAM POWER AMPLIFIER EUROPEAN TYPE QB 2/250 Filament Thoriated Tungsten AMERICAN TYPE 8 1 3 Voltage (A.C. or D.C.) 10 Volts Current 5 Amperes Transconductance (for plate current of 50 mA.) 3,750 µMhos Mu-Factor, Grid No.l to Grid No.2 ~ 8.5 Direct Interelectrode Capacitances (Approx.) Grid No.l to Plate (with no external shielding) 0.16 pF Input 16 pF Output 13 pF Plate Voltage (D.C.) 2,000 Volts max. Grid No.2 (Screen) Voltage (D.C.) 400 Volts max. Plate Dissipation 100 Watts max. Grid No.2 Dissipation 22 Watts max.
Note : On the tube nomenclature of the American equivarent type is also printed.
J 20 N$C TRANSMITTING TUBE CHARACTERISTIC DATA
Unit mm
Ecl (V) Bottom View of 200 Socket Connection 180 7F25A ■: Gi 16 ~p Ia=02 Constant Current 1400 Characteristics .■ 120 Ecz=1000 Vac z 100 ,.08 0P Ia = .0 80 ~~~~~, 60 _- , ,~i~~::~_/~ ~, 4 O~~~i'~~~~~__ 30 20 Pin 1-Filament ~.'~ ~ -- 005 l5 Pin 2-Grid No. 2 ■■_■.~~ ~0 2000 ►911~~'~~= 6100 Pin 3-Grid No. I l0 ~ Pin 4-Grid No. 2 —~~~~ 4i Pin 5-Filament Cap-Plate -81 ~~N~~~~ -8~ ~~~'~ ~ Q. -10 1 I ~'~'~~~ `~ ~' 0.4 12~ 02
AA'=PLANE OF ELECTRODES Unit mm Pin 1-Filament Bottom View of Pin 2-No Connection Socket Connection Pin 3-Grid No.2 Pin 4-Grid No. I Pin 5-Grid No.3 Int. Shield Gl Pin 6-No Connection Pin 7-Filament Cap -Plate TUBE MOUNTING POSITION VERTICAL: Base up or down HORIZONTAL: Plane of electrodes vertical (on edge)
En-Ib 4613 Eb-Icz Character'stics Ef=10Vac Ecz=400Vdc.
V 20 10 GONiROLGRID(Ecl1= 100 09;; 80V
a 150 -08 i~~~\ 8UV I a 07-~F------ii~~ _ 40V "'06 a i t ~ ~r a 100 w05 ~ o ZOV ~ I 6~~~~G~ __ _._ v ) x-04 ` >o~ ~ -- 03 ago` ; T ov 80 of ``~ ,~;~,` `zd. 4~, ,,~-_~~ _ ,- - _ _ I ZOV -40V 0 100 400 800 800 1000 1100 1400 1600 1800 2000 PLATE VOLTS (Ebl i 21 NEC 2632 PUSH-PULL R-F BEAM POWER AMPLIFIER EUROPEAN TYPE QQE 04/20 Heater, for Unipotential Cathodes AMERICAN TYPE 8 3 2 - A Heater Arrangement Series Parallel Voltage (AC. or DC.) 12.6 Volts 6.3 Volts Current 0.8 Ampere 1.6 Amperes Transconductance (Each Unit) 3,500 µMhos (for plate current of 30 mA) Mu-Factor, Grid-No. 1 to Grid-No.2 6.5 Direct Interelectrode Capacitances (Each Unit) Grid-No.l to Plate* 0.07 pF max. Input (Approx.) 8 pF Output (Approx.) 3.8 pF Grid-No.2 to Cathode (including internal grid No.2 by-pass 65 pF capacitor, Approx.) * With external shield up to flange seal .
,- ~-a..~..~ Plate Voltage (D.C.) 750 Volts max. Plate Dissipation 15 Watts Grid-No.2 (Screen) Voltage (D.C.) 250 Volts Grid-No.2 Dissipation 5 Watts max.
1Vote : On the tube nomenclature of the American equivalent type is also printed.
NEC 2829 PUSH-PULL R-F BEAM POWER AMPLIFIER EUROPEAN TYPE C-144 Heater, for Unipotential Cathodes AMERICAN TYPE SZ9-B Heater Arrangement Series Parallel Voltage (A.C. or D.C.) 12.6 Volts 6.3 Volts Current 1.125 Amperes 2.25 Amperes (Each Unit) Transconductance 8,500 µMhos (for plate current of 60 mA.) Mu-Factor Grid No.2 to Grid No.l 9 Direct Interelectrode Capacitances (Each Unit): Grid-No.l to Plate* 0.12 pF max. Input (Approx.) 145 pF Output (Approx.) 7 pF Grid-No.2 to Cathode (Including internal grid No. 2 by- 65 pF pass capacitor, Approx.) * With external shield up to flange seal
Plate Voltage (D.C.) ~ 750 Volts max. Plate Dissipation 30 Watts max. (Natural cooling) 40 Watts max. (Forced Air cooling) Grid-No.2 (Screen) Voltage (D.C.) 225 Volts max. Grid-No.2 Dissipation 7 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
22 NBC TRANSMITTING TUBE ~HARAtTERIST~C DATA
Unit mm Bottom View of 25 Socket Connection 20 h GRID CURRENT d 15 f a 10 0 EcI-I5V it 5 cn lOV 5V 0 100 l00 300 400 2 PIATL VOLTS (Eb)
A' 2832 Eb-Ip Icz Characteristics For Each Unit z4D AA'=PLANE OF ELECTRODES OF EACH UNIT IS PARALLEL TO PLANE 22D THROUGH AXIS OE TUBE 200 Pin 1-Heater Pin 2-Grid No. l of Unit No. 2 I80 Pin 3-Grid No.2 H 160 ~~1~~~~~~~~~~~~ Pin 4-Cathode, Grid No.3 ~1V~~~~~~~~~~~~~ Pin 5-Heater Center Tap I40 Pin 6-Grid No. l of Unit No. l I20 ~I~l~~s~~~ii~~~■ Pin 7-Heater 1P, & 2P-Plate Terminals of Units No. 1 100 and No. 2 respectively BO 6D ~~,~~~~~~_~~~~■ 1520v TUBE MOUNTING POSITION ',~~~~:.■ RID No.2 GURREN 40 V 1~~~~~~~~-~~~~~ VERTICAL: Plate terminals up or down 20 OV HORIZONTAL: Plane of each Plate in Vertical II~~~~~~~~~~~~~fc-0 V position (on edge) 0 100 200 300 400 5 0 600 700 Connections should never be soldered to the PLATE VOLTS (E01 tube terminals
Unit mm Bottom View of so I I Socket Connection RO NTROCG IO VO TAGE i='}5V)
70 `,,- '`■~■■■ 2ov w 00 50,,..■■~ ~~`~~~~ -I5V 0 40 " 30 z 20~~ ~~~~ ,..■~~ V ~ IO~■~■n 0 100 l00 300 400 500 600 700 0 100 100 300 400 500 600 700 PLATE VOLTS (Eb) PLATE VOLTS (En)
2829 AA'=PLANE OF ELECTRODES OF EACH Eb-ID Characteristics Far Each Unit UNIT IS PARALLEL TO PLANE Et=126V Series HeaterArrangment Screen Voltage (Ec1=220V THROUGH AXIS OF TUBE r Pin 1-Heater 8 EpNTROLCONTROL OR Pin 2-Grid No. 1 of Unit No.2 Pin 3-Grid No.2 Pin 4-Cathode, Grid No.3 15 Pin 5-Heater Center Tap 6 Pin 6-Grid No. 1 of Unit No. l 10 Pin 7-Heater a 5 +5 1P, & 2P-Plate Terminals of~Units No.l and No.2 respectively a 4 Ei 3 TUBE MOUNTING POSITION 2 VERTICAL: Plate terminals up of down HORIZONTAL: Plane of each Plate in vertical Position (on edge) never Connections should be soldered to the 100 200 300 400 500 600 700 tube terminals PLATE VOLTS (En)
23 NEC 4654 PUSH-PULL R-F BEAM POWER AMPLIFIER
EUROPEAN TYPE QQE03/20 Heater, for Unipotential Cathode AMERICAN TYPE 6 2 5 2 Heater Arrangement Series Parallel Voltage (A.C. or D.C.) ', 12.6 6.3 Volts Current 0.65 1.3 Amperes Transconductance Each Unit (for plate current of 20 mA) 3,000 µMhos Mu-Factor Grid No.2 to Grid No.l 8 Direct Interelectrode Capacitances (Each Unit): Grid-No.l to Plate* 0.06 pF max. Input (Approx.) 6.5 pF Output (Approx.) 2.2 pF *With external shield up to flange seal Plate Voltage (D.C.) 600 Volts max. Plate Dissipation 20 Watts max. Grid No.2 (Screen) Voltage (D.C) 250 Volts max. Grid No.2 (Screen) Dissipation 3 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
NEC 2694 PUSH-PULL R-F BEAM POWER AMPLIFIER
EUROPEAN TYPE QQE06/40 Heater, for Unipotential Cathode: AMERICAN TYPE 5 8 9 4 Heater Arrangement Series Parallel Voltage (A.C. or D.C.) 12.6 6.3 Volts Current 0.9 1.8 Amperes Transconductance (Each Unit) 7,500 µ Mhos (for plate current of 60 mA) Mu-Factor Grid No.2 to Grid No.l 8.2 Direct Interelectrode Capacitances (Each Unit): Grid-No.l to Plate* 0.09 pF max. Input (Approx.) 10.5 pF Output (Approx.) 3.2 pF * With external Shield up to flange seal
Plate Voltage (D.C.) ', 600 Volts max. Plate Dissipation 40 Watts max. Grid-No.2 (Screen) Voltage (D.C.) 250 Volts max. Grid-No.2 (Screen) Dissipation 7 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
24 NBC TRANSMITTING TUBE
Unit mm
Eb- Icl Bottom View of Socket Connection 40 K,G3 E 30 .~ 20 Ea = I5V — Gov i to ~_ Sv 44~ i INTERNAL 0 100 L00 300 400 500 6 0 SHI ELD ~1 -- En (V) 47~-2 2852(6252) 40D Eb-Ib,Icz Characteristics U i Ecz= 250Vdc Ecl=20V Pin 1-Heater ~.~ 15V Pin 2-Grid No.l Unit No.2 300 Pin 3-Grid No.2 Pin 4-Cathode, Grid No.3 Internal Shield E Pin 5-Heater Center Tap 200 ~~, ■ ®■1 Pin 6-Grid No.l of Unit No.l a ~: ■ ~ Pin 7-Heater 2P 1P, & -Plate of Unit No.l & No.2 t 1 1 100 ,_■ ■" ~ ' .. ■■■■. t ■ ~ ------0 100 200 300 400 500 600 -- Eb (V)
Unit mm GoAstant Current Gharacterislics EGt (V) Ecz= Z50V 40 Bottom View of Socket Connection 6~~P l~ ■ ,30 k Ga Ia=50mA ■ Gz~ !`~! AHCT V,~~ -_ ~~ 20 ,~~~ t t ~ In=f00m~ ~. %~ ' t~~ 500 2Gi rZ~J 1Gt 10 ~' ~ ~ 400 / % ~ __ 11 0 ~~, , ~~ t0' 400 500 6t0 E (V 2 0 1 Pin 1-Heater 5 Pin 2-Grid No.l of Unit No.2 ~. ~~- /0 Pin 3-Grid No.2 _2 Pin 4-Cathode Grid No.3 Internal Shield .~ Pin 5-Heater Center Tap ,/~ No.l ~- Pin 6-Grid No.l of Unit 30 Pin 7-Heater D 1P, & 2P-Plate of Unit No.l & No.2 d ~ i
- 0 -5
25 NEC 2646 VHF BEAM POWER AMPLIFIER
EUROPEAN TYPE QE05/40 Heater, for Unipotential Cathode AMERICAN TYPE 61 4 6 Voltage (A.0 or D.C) 6.3 Volts Current 1.25 Amperes. Mu-Factor Grid No.2 to Grid No.l I 4.5 Direct Interelectrode Capacitances Grid No. i to Plate 0.22 pF max. Input (Approx.) 13 pF. Output (Approx.) 8.5 pF. Plate Voltage (D.C) 600 Volts max. Plate Dissipation 20 Watts max. Grid No. 2 (Screen) Voltage (D.C) 250 Volts max. Grid No.2 (Screen) Dissipation 3 Watts max.
NEC 2E26 BEAM POWER TETRODE
EUROPEAN TYPE Heater, for Unipotential Cathode AMERICAN- TYPE 2 E 2 6 Voltage (AC or DC) 6.3 Volts Current 0.8 Amperes Mu-Factor Grid No.2 to Grid No. 1 6.5 Direct Interelectrode Capacitances Grid No.l to Plate 0.2 pF max Input (Approx.) 13 pF Output (Approx.) 7 pF Plate Voltage (DC) 500 Volts max. Plate Dissipation 10 Watts max. Grid No.2 (Screen) Voltage (D.C) 200 Volts max. Grid No.2 (Screen) Dissipation 2.5 Watts max.
26 NBC TRANSMITTING TUBE
Unit mm
Bottom View of Socket Connection
Pin 1-Cathode, Grid Internal Shield Pin 2-Heater Pin 3-Grid No.2 - Pin 4-Same as Pin 1 Pin 5-Grid No.l Pin 6-Same as Pin 1 Pin 7-Heater Pin 8-Base Sleeve Cap-Plate K,G3,IS BS
2 B46 Pos"five Grid Ef -fz3 VOLTS \ Average-T___ Ef=6.3VOLT5 Characteristics Ecz=200VOLTS Characteristics ~-2~~VOLTS p0 ~ -+l0 80 Eci=•40 +10 Q600 60 Q E EC1=0 400 40 •30 -ro '01 / -- i ~20 i 20 •20 -30 •)0 ------" - _-______-_ _ ~_ -~==zo n inn inn xnn enn cnn enn ~n0 100 200 300 400 500 Eb (Vl -- Eb (V)
Unit mm
. 120 Ecz= 200V ~~ Bottom View of ~~~~ Socket Connection ■■■ti■■~■~■■
B ~1~ ~~ ~~~~~~ i 5~ 40
20~~L_
00 100 200 300 400 500. 600 —v ~ 3 BS En
Pin 1-Cathode, Grid No. 3 2E26 Eb-ID(Icz) l0 Ef=6.3V Ecz-200V Internal Shield Sma l I-Wafer Pin 2-Heater a Octal T Y Pin 3-Grid No. 2 a ---- 34~MAX.— Pin 4-Same as Pin 1 ~-•40V a b Pin 5-Grid No.l 30V 0 ~~ Pin 6-Same as Pin 1 v 20 Pin 7-Heater a ,~ o" Pin 8-Base Sleeve 0 z Cap-Plate a ,~~0 ~ ~ ov a ~v ~~~ 0. ------0 100 200 300 400 500 600 Eb V
27 NEC UY-807 BEAM POWER AMPLIFIER
EUROPEAN TYPE QE06/50 Heater for Unipotential Cathode AMERICAN TYPE 8 O 7 Voltage (A.C. or D.C.) 6.3 Volts Current 0.9 Amperes Transconductance (Approx.) 6,000 µMhos Mu-Factor, Grid No.2 to Grid No.l 8 Direct Interelectrode Capacitance Grid No. 1 to Plate '~ 0.2 pF max. Input (Approx.) 12 pF Output (Approx.) 7 pF Plate Voltage (D.C.) ~ 600 Volts max. Plate Dissipation 25 Watts max. Grid No.2 Screen Voltage (D.C.) j 300 Volts max. Grid No.2 Dissipation 3.5 Watts max.
NEC 2P22 POWER PENTODE
EUROPEAN TYPE CV-798 Filament, Coated AMERICAN TYPE 2 E 3 2 Voltage (AC or DC) 6.3 Volts Current 1.5 Amperes. Heating Time Less than 2 seconds Mu-Factor Grid No.2 to Grid No.l 9 Direct Interelectrode Capacitances Grid No. 1 to Plate 0.2 pF max. "~ Input (Approx.) 13 pF Output (Approx.) 8 pF Plate Voltage (DC) 750 Volts max. Plate Dissipation 33 Watts max. Grid No.2 (Screen) Voltage (DC) 275 Volts max. Grid No.2 (Screen) Dissipation 10 Watts max.
Note : On the tube nomenclature of the American equivalent type is also printed.
28 N~'C TRANSMITTING TUBE CHARACTERISTIC DATA
Iu la Ef=6.3V Ecz-200V (mA) (A) 200 05 Unit mm a w Ec V Bottom View of -~ Socket Connection ~ 150 04 Ian ~ ~ 03 0 Gl a — Ioo az ~tti-JOY 10 aZ soar 0 0 Ty OV ~ 0 K.G 3 0 100 Z00 300 400 500 600 700 PLATE VOLTS (Eb) Ef-5.3V 'Ecz=250V lu Ib I (mA)(A &r=40V e"' 20005 it 'OV 04 ~Q 150 ZGV ~ ~ 03 ~ 100 IOV Cap —Plate az ., o V Pin 1—Heater 50 ao ¢I Pin 2—Grid No.2 (Screen Grid) z _ Pin 3—Grid No.l (Control Grid) 0 100 100 300 400 50b 6 0 700 PLATE VOLTS (Eb) Pin 4—Cathode, Grid No.3 Pin 5—Heater Ef-6.31 Ecz-300V Icz In (mAl(A aN 300 O6 TUBE MOUNTING POSITION ~,~ zoo
VERTICAL : Bace up or down a~150 0 ~ 03 HORIZONTAL : Plane of electrodes g z vertical (on edge) ~o (~ OZ 50 0
0 100 200 300 400 500 600 700 PLATE VOLTS (Eb)
Unit mm 2P22 Ecz = 250 V 90D Ea =50V Bottom View of BDO Socket Connection 700 40V GI Q 600 e 30V 500 -- 20V ~; 400 IOV 300 OV 200 5V
100 -10V 0 100 200 300 400 500 600 700 800 Eb(VI
]00 Pin 1-Filament 80 Pin 2-Grid No.2 Pin 3-Grid No.l 60 \ Ecr=50V E 40V Pin 4-Grid No.3 30V 40 20V Pin 5-Filament IOV Cap-Plate 20 ~
0 100 l00 300 400 S00 600 700 800 Eb (V)
29 N~'C 2H66 HALF-WAVE MERCURY-VAPOR RECTIFIER EUROPEAN TYPE 2V/400A Filament * Oxide coated AMERICAN TYPE 866-A/866 2.5 Volts Current 5 Amperes Tube Voltage Drop (Approx.) 15 Volts Peak Inverse Voltage 2,000 For Supply Freq. up to 150 c/s Volts max. 10,000 Volts max. Peak Plate Current 2 Ampere max. 1 Ampere max. Average Plate Current 0.5 Ampere max. 0.25 Ampere max. Condensed Mercury Temp. 25°--60°C # 25°~-50°C
* The filament of the 2H66 should be allowed to come up to operating temperature before plate voltage is applied. For average conditions, the delay is approximately 30 seconds. # Operation at 40° ± 5°C is recommended.
Note : On the tube nomenclature of the American equivalent type is also printed.
NEC 4N72 HALF-WAVE MERCURY-VAPOR RECTIFIER
EUROPEAN TYPE 40648 Filament * Oxide coated AMERICAN TYPE 872-A/872 Voltage (A.C.) 5 Volts Current 7.5 Amperes Peak Inverse Voltage For Supply Frequency up to 150 c/s 10,000 Volts max. Condensed—Mercury Temp. 25° to 55°C# Peak Plate Current 5 Amperes inax. Average Plate Current 1.25 Amperes max. Tube Voltage Drop (Approx.) 10 Volts
* The filament of the 4H72 should be allowed to come up to operating temperature before plate voltage is applied. For average conditions the delay is approximately 30 seconds. # Operation at 40° ± 5°C is recommended.
Note : On the tube nomenclature of the American equivalent type is also printed.
30 N~'C TRANSMITTING TUBE
Unit mm
Bottom View of ~-Gas-Type Tube Socket Connection Pin 1-Filament Pin 2-No Connection Pin 3-No Connection Pin 4-Filament, Cathode shield P—Plate
TUBE MOUNTING POSITION
VERTICAL : Base down HORIZONTAL : No
Unit mm
Bottom View of • -Gas-Type Tube Socket Connection Pin 1-No Connection Pin 2-Filament, Cathode shield FS F NC Pin 3-No Connection Pin 4-Filament P —Plate
NC
TUBE MOUNTING POSITION
VERTICAL: Base down HORIZONTAL: No
3~ NEC 4N73 HALF-WAVE MERCURY-VAPOR RECTIFIER EUROPEAN TYPE The 4H73 is a half wave, mercury-vapor rectifier tube designed to with stand high peak inverse voltage, and to conduct at relatively low AMERICAN TYPE 6 7 3 applied voltage.
Filament Oxide coated Voltage (A.C.) 5 Volts Current 10 Amperes rl Heating Time (Minimum) 30 sec. Tube Voltage Drop (Approx.) 10 Volts Peak Inverse Voltage For Supply Frequency up to 150 c/s 15,000 Volts max. Condensed—Mercury Temp. 25-,-55°C* Peak Plate Current 6 Amperes max. Average Plate Current 1.5 Amperes max.
* Operating at 35 ±5°C is recommended.
The 4H73 (673) has the same ratings and characteristics as the type 575-A. Mechanically, however, the 4H73 (673) differs from the 575-A in its base, basing Connections, and overall length.
Note : On the tube nomenclature of the American equivalent type is also printed.
N~'C SN69A HALF-WAVE MERCURY-VAPOR RECTIFIER
EUROPEAN TYPE DCG9/20 Filament* Oxide coated AMERICAN TYPE 869-B Voltage (A.C.) 5 Volts Current 19 Amperes Peak Inverse Voltage For Supply Frequency up to 150 c/s 20,000 Volts max. Condensed Mercury Temp. 30°--40° C# Peak Plate Current 10 Amperes max. Average Plate Current 2.5 Amperes max. Tube Voltage Drop (Approx.) 15 Volts
* The filament of the 5H69A should be allowed to come up to operating temperature before plate voltage is applied. For average conditions, the delay is approximately 1 minute. # Forced ventilation, recommended temperature of condensed mercury 35°C ± 5°C
Note : On the tube nomenclature of the American equivalent type is also printed.
32 NBC TRANSMITTING TUBE ~'HARACTERISTIC DAT~k
Unit mm
Bottom View of ~ —Gas-Type Tube Socket Connection Pin 1-No Connection Pin 2-Filament, Cathode Shield Pin 3-~Filament Pin 4-No Connection P-plate
TUBE MOUNTING POSITION
VERTICAL: Base down HORIZONTAL: No
Unit mm
20.3m- 0.2
Bottom View of ~ —Gas-Type Tube 123~MAX. Socket Connection P—Plate 0 F—Filament 0 P
TUBE MOUNTING POSITION VERTICAL: Base down HORIZONTAL: 1~To
Z51Z5
33 HALF-WAVE MERCURY-VAPOR RECTIFIER
Filament* Oxide coated Voltage (A.C.) 5 Volts Current 30 Amperes Peak Inverse Voltage N~'C 7H57 For Supply Frequency up to 150 c/s 20,000 Volts max. Condensed—Mercury Temp. 30°-~40°C EUROPEAN TYPE AH-205 Peak Plate Current 40 Amperes max. AMERICAN TYPE 857-B Average Plate Current ' 10 Amperes max. Tube Voltage Drop (Approx.) j 15 Volts
* Z he filament of the 7H57 should be allowed to come up to operating temperature before plate voltage is applied. For average conditions the delay is approximately 1 minute. Note : On the tube nomenclature of the American equivalent type is also printed.
HALF-WAVE INERT-GAS-FILLED RECTIFIER
The 2H28 (3B28) is an inert-gas-filled, half wave rectifier for use in high voltage rectifier circuits.
Filament Oxide coated Voltage (A.C) 2.5 Volts NEC 2H28 Current 5 Amperes EUROPEAN TYPE DCX4/000 Heating Time (Minimum) 5 Sec. Ttibe Voltage Drop (Approx.) 14 Volts AMERICAN TYPE 3 B 2 8 Maximum Freq. ~ Maximum Freq. 500 c/s 150 c/s Peak Inverse Voltage 5,000 Volts max. '~ 10,000 Volts max. Peak Plate Current 2 Amperes max. j 1 Amperes max. Average Plate Current 0.5 Amperes max. ', 0.25 Amperes max. Ambient Temperature Limits - 55 to+75°C - 55 to-I-75°C
HALF-WAVE INERT-GAS-FILLED RECTIFIER
The 4H32 (4B32) is an inert-gas-filled, half wave rectifier for use in high voltage rectifier circuits.
Filament Oxide coated NEC 4H32 Voltage (A.C.) 5 volts Current ' 7.5 Amperes EUROPEAN TYPE DCX4/5000 Heating Time (Minimum) i 30 Sec. AMERICAN TYPE 4 B 3 2 Tube Voltage Drop (Approx.) 10 Volts Peak Inverse Voltage 10,000 Volts max. Peak Plate Current 5 Amperes max. Average Plate Current 1.25 Amperes max. Maximum Frequency 150 c/s Ambient Temperature Limits -55 to +70°C
J 34 NBC TRANSAAITTING TUBE CHARACTERISTIC D~►
Unit mm Bottom View of Socket Connection i ~'
FS F
•-Gas-Type Tube F-Filament FS-Filament, Cathode Shield P-Plate TUB~C MOUNTING POSITION VERTICAL: Filament base down 16 HORIZONTAL: No
,► Bottom View of Socket Connection
• -Gas-Type Tube Pin 1-Filament Pin 2-No Connection Pin 3-No Connection Pin 4-Filament, Cathode Shield P-Plate
Bottom View of Socket Connection
• -Gas-Type Tube Pin 1-No Connection Pin 2-Filament, Cathode Shield Pin 3-No Connection Pin 4-Filament P-Plate
35 Nf~~onLzlectric Companrltd
2, Shiba Mita Shikoku-machi, Minato-ku, Tokyo, Japan Tel. Tokyo 45-1171 (9) • 5121 (9) • 5221 (9) Cable Address "MICROPHONE TOKYO "