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Radio Valve Data: 1926-1946

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Radio Valve Data: 1926-1946 Radio Valve Data: 1926-1946 Supplement to British Radio Valves The Classic Years Characteristics and connections for over 4000 valves Keith R Thrower Published by Speedwell ISBN 978-0-9537166-4-7 Contents Abbreviation & Symbols 3 Fama 37 Radio Micro 85 Explanation of the Tables 4 Ferranti 38Radion 85 Valve Data 5-156 Fotos 39 Radvaco 85 Amplion 5 Frelat 40 Ratvaco 85 Aneloy 5 Graham-Farish 41 Radio Record 86 ARA 6 Helikon 41 RAF 129 Army 123 Hivac 42 Scott Taggart 88 Beam 6 HMV 44 Six-Sixty 88 Benjamin 6 Lissen 45 Splendor 90 Beriton 6 Loewe-Audion 47 Stal 90 Brimar 7 Louden 48 Standard 91 Brittania 13 Lumos 48 STC 91 BSA-Standard 13 Lustrolux 49 Sutra 93 BTH 14 Marconi 50 Tela-Radio 93 Burndept 15 Mazda 59 Three Six Two 93 CAC 15 Metal 66 Triotron 96 Clarion 16 Micromesh 66 Tungsram 101 Cleartron 17 Midland 67 Univella 111 Cosmos 18 Monotone 67 US 112 Cossor 19 Mullard 68 Valeo 111 Dario 28 Navy 126 Vatea 111 Dayros 32 Neutron 80 Vita 111 Double Two 32 North London Valve Co. (NLV) 80 Voltron 111 Dulivac 32 Octron 80 Rectifiers 141 Eagle 32 Osram 50 Tuning Indicators 153 Ediswan 32 Ostar-Ganz 81 Thyratrons 155 Ekco 34 Pix 82 Barretters 156 Elka 34 Peter Russell (P.R.) 83 Valve Bases & Connections 157 Ensign 34 Post Office 134 Base diagrams 158 ETA 34 Power Tone 84 Base connections 160 Eton 35 Quadruple Valve Co (QVC) 84 Alphanumeric List of Valve Types 172 Ever-Ready 35 Quicko 84 Abbreviations & Symbols ABBREVIATIONS USED IN VALVE TABLES RF Radio Frequency a.c. Filament normally run from an a.c. supply Rk Cathode resistor for auto bias AF Audio Frequency Rl Optimum load resistance for specified output power bt Beam tetrode r.m.s. Root mean square CD Critical distance (tetrode) st Side terminal on valve base CRO Cathode-ray oscilloscope t triode d.c. For d.c. mains operation with series connection t/b Timebase DC Direct coupled (amplifier) tet Tetrode deg Degrees of shadow angle tt Top terminal (i.e. screw terminal) DH Directly heated cathode VD Voltage doubler rectifier det Detector VM Variable-mu FC Frequency changer fmax Maximum frequency FW Full-wave (rectifier) HEADINGS USED IN VALVE TABLES gc Conversion conductance of frequency changers (See also the symbol Type Manufacturers’ designation used to indicate this.) Description Principal uses of the valve Sm Mutual conductance (slope) Filament Filament or heater GP General-purpose (valve) Auxiliary grid Screen grid for all multi-electrode valves, except for bi-grid valves, h Hexode or heptode section of frequency changer used as a mixer or space charge tetrodes when it’s the inner grid HW Half-wave (rectifier) Grid Control grid IH Indirectly heated cathode Base See section on Bases and Connections lo Rectified output current Year Approximate year when valve became generally available in the mix Mixer section of frequency changer UK mu, ]x Amplification factor MV Mercury-vapour rectifier osc Oscillator section of frequency changer SYMBOLS USED IN VALVE TABLES * ot Output triode Appended to filament voltage, indicates directly heated P Pentode Appended to filament current, indicates centre-tapped filament PIV Peak Inverse Voltage enabling it be operated at twice the voltage and half the current Po Power output Underline in RL column is the anode-to-anode resistance, in Va PW Post War column is total anode current and in RK column is common r Rectifier resistance feeding both valves A Indicates conversion conductance ra Anode dynamic resistance RC(C) Resistance-capacitance coupled 3 Explanation of the Tables Type Two figures are given for many of the variable- conditions. Where a grid bias voltage is also This is the type designation given by the mu valves. These two figures indicate the likely given this should be ignored. supplier. It may be found that dots, strokes or range of bias for a.g.c. purposes. Base dashes are also given but the supplier is not ra See separate section which gives an outline always consistent in their use. The resistance value given is a nominal figure drawing for the various base types to be found, Description only and can vary by 2:1 or more over the together with accompanying tables of This gives the normal uses for the valve. normal operational range of the valve. connections. However, it does not preclude other uses. 9m Year Filament This is a mutual conductance (slope) figure This is an approximate year of its introduction These two columns refer to the nominal voltage given by the manufacturer when measured in the UK (and may be much earlier in the and current for the filament or heater. Usually under the most favourable conditions. In country of origin for foreign valves). In a few the voltage should be maintained within ±5%. operation the slope is usually considerably cases an intelligent guess has been made, but It is bad practice to underrun the filament. lower than this. for the vast majority of valves the year has been established from advertisements, data sheets Anode 9c and reviews in journals. Even so, there could be The anode voltage figure can be misleading. This is the conversion conductance figure for a an error of up to a year in the date given. The figure given is usually the maximum frequency changer valve. recommended, although not necessarily the Rl absolute maximum. For some early valves a This is the resistive load required for the range of voltages is given. For output valves the specified output power and is optimized for a anode and other voltages given is that required compromise between maximum power and for the specified output power. minimum distortion. For push-pull valves the Where two figures are given these refer to the figure given is for anode-to-anode. quiescent current and maximum current Po Auxiliary Grid This is the power output for the specified anode This is the screen grid for tetrodes, pentodes load and the anode, screen and control grid and frequency changers but the inner grid for voltages. bi-grid valves. The voltage given is usually that The power output is for a specified level of total required for normal operation. harmonic distortion such as 10% (or 5% for Grid push-pull operation). This is the control or signal grid for all types of Rk valve. Where a voltage is given this is usually This is the recommended value of the cathode that required for operation at the stated anode bias resistor for all the other stated operating and auxiliary grid voltages. 4 Type DescriptionFilament Anode Auxiliary grid Grid r0 9m/ 9c Rl Po Rk Base Year Volts Amps Volts mA Volts mA -V kCl mAN kQ Watts Cl Type Ref. AMPLION AM G.2/25 General-purpose triode 2.0* 0.25 120 1.6-6 18.0 0.50 B4 A 1926 AMG.6/9 General-purpose triode 6.0* 0.09 120 1.5-6 18.0 0.50 B4 A 1926 AML.2/30 Output triode 2.0* 0.30 120 1.5-9 7.5 0.93 B4 A 1926 AML. 6/25 Output triode 6.0* 0.25 120 1.5-9 3.5 1.70 B4 A 1926 AMR.2/9 RF or RCC triode 0.09 120 0-1.5 70.0 0.50 B4 A 19262.0* AMR.6/9 RF or detector triode 6.0* 0.09 120 1.5-6 55.0 0.64 B4 A 1926 AMS.6/100 Output triode 350 3-18 B4 A 19266.0*0.10 ANELOY AP235 Bi-grid tetrode2.0* 0.35 B4+st AB 1927 AP406 Bi-grid tetrode 4.0* 0.06 B4+st AB 1927 AP412HF RF or RC bi-grid tetrode 4.0* 20-1004-25 60.0 0.45 B4+st AB 19270.12 AP412LF AF bi-grid tetrode 4.0* 0.12 20-50 10-15 11.0 0.68 B4+st AB 1927 AP412P Output bi-grid tetrode 4.0* 0.12 40-100 . 10-20 4.9 1.10 B4+st AB 1927 AP412RC RCC bi-grid tetrode 4.0* 0.12 60 120.0 0.31 B4+st AB 1927 AP412SG RF bi-grid tetrode4.0* 0.12 30-120 4-25 500.0 0.20 B4+st AB 1927 AP412U Detector bi-grid tetrode 4.0* 0.12 B4+st AB 1927 AP425P Output bi-grid tetrode 4.0* 0.25 40-100 10-25 2.4 1.24 B4+st AB 1927 B.E. (4V) GP bi-grid tetrode 3.5* 0.55 50-100 B4+st AB 1927 B.E. (6V) GP bi-grid tetrode6.0* 0.50 B4+st AB 1927 5-pin L D.E. GP bi-grid tetrode 4.0* 0.34 ditto 1927 D.E.06 GP bi-grid tetrode 4.0* 0.06 ditto 1927 D.E.4 GP bi-grid tetrode 4.0* 0.56 ditto 1927 D.E.34 GP bi-grid tetrode 4.0* 0.34 ditto 1927 H.F. RF bi-grid tetrode 2.0* 0.34 20-30 B4+st AB 1927 H.F. & DET RF or RC bi-grid tetrode3.5* 0.06 20-25 B4+st AB 1927 L.F. AF bi-grid tetrode 2.0* 0.34 20-40 B4+st AB 1927 L.S.680 Output bi-grid tetrode 6.0* 0.80 200 1.0 3.00 B4+st AB 1929 5 Type Description Filament Anode Auxiliary grid Grid ra 9m/ 9c Rl Po Rk Base Year VoltsAmps VoltsmA Volts mA -V kQ mA/V kQ Watts n Type Ref.
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