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    Characteristics of 3,000 Valves, Transistors, Rectifiers

    and Cathode-Ray Tubes

    Compiled by the stuff of ' WIRELESS WORLD'

    First published February, 1949 Sixth Edition (:), Ilitre & Sons Ltd. 1958

    A ' Wireless World' Book




    Tables of Valve Characteristics :

    Frequency-changers . . Screened Tetrodes and Pentodes Output Valves 1 Output Valves 2 Output Valves 3 Thermionic Diodes Semiconductor Diodes Point Contact Transistors Symmetrical Transistors Junction Transistors Amplifier 'Triodes Small Transmitting Valves Valve Rectifiers Metal Rectifiers E.H.T. Rectifiers Cathode-ray Tuning Indicators Barretters Voltage Stabilizers Thyratrons Television Cathode-ray Tubes Oscilloscope Cathode-ray Tubes Efficiency Diodes

    Explanation of Valve-base Connections 87

    Valve Base Diagrams

    Trade Names and Manufacturers' Addresses 108

    Index, Base Connections and Valve Equivalents 109

    GENERAL ABBREVIATIONS Used in Valve Data Tables

    * appended to filament or heater voltage indicates a directly heated cathode (that is, filament). Valves without the asterisk have indirectly heated cathodes.

    1. appended to filament or heater current indicates that the valve has a centre-tapped filament or heater. The figures given are invariably for the parallel con- nection of the two parts ; for the series connection the voltage is doubled and the current halved.

    (Some directly heated valves of low current, con- sumption may need the conned-lion of a resistor across one half of the filament when using the series con- nection.)

    Valve Abbreviations

    a—a Anode-to-anode

    BT Beam tetrode

    Ca k Anode-cathode capacitance

    cgc, Grid-anode capacitance c :51

    Grid-cathode capacitance Distortion

    DD Double-diode DBT Double-beam tetrode

    DP Double-pentode

    DT Double-triode FW Full-wave g—g Grid-to-grid gic Conversion conductance

    gin Mutual conductance HW Half-wave H Heptode

    H„, Hexode

    Ik Cathode current MV Mercury vapour O Octode P Pentode

    Pa Anode dissipation

    PI Peak inverse

    R Rectifier

    ra Anode a.c. resistance

    Rh Cathode bias resistance

    R, Optimum load resistance SD Single diode

    SE Secondary emission SQ Special Quality

    T Triode TD Triple diode TH Triode heptode TI-4 Triode hexode TP Triode pentode TT Tetrode VD Voltage-doubler VM Variable mu

    Transistor Abbreviations

    P, Collector dissipation at 25°C V, Collector volts

    Ie Collector current

    le Emitter current rb=rb Base resistance re—re Emitter resistance

    re Collector resistance

    re' Collector resistance (common emitter coii-' nection)

    1-,,, Mutual resistance

    oc.' Current gain (common emitter connection) -

    oc Current gain fot Alpha cut-off frequency Ice Collector current at Ie=0 re=---re'(1 + ix')

    Published for " Wireless World" by Iliffe & Sons Ltd., Dorset House, Stamford Street, London, S.E.1, and printed in England by Cornwall Press Ltd., Paris Garden. London, S.E.I. BKS 3133

    THE INFORMATION GIVEN refers to the main electrical characteristics of valves together with their base con- nections. Physical dimensions are not included since there is a limit to the amount of information which it is practicable to give and size is only occasionally an important factor in the choice of a valve.

    The valves are classified under main headings accord- ing to their type. In each section they are divided according to their make and then sub-divided into obsolete, replacement and current types. The tables are largely self-explanatory, but the following notes should be read carefully if they are to be fully understood.

    Litifitations of space necessarily restrict the amount of infOrmation which can be included in these tables, so designers requiring more detailed information should consult the valve manufacturers' published literature.

    FREQUENCY-CHANGERS Valves in this section are intended primarily for use as

    frequency-changers in superheterodynes and the figures given are the normal operating conditions for this application. Some of the valves included are occasion- ally used for other purposes, however, and the voltages and currents may then be very different. Even in their normal application differences may be found in individual receivers, since not all designers adopt the " normal " conditions ; this is particularly the case when the oper- ation is on short-wave bands.

    It is to be noted that some valves which do not include an oscillator section, and which thus apparently require a separate oscillator, can actually be used as complete frequency-changers by using an oscillator circuit coupled between cathode and another electrode. The operation of such valves is likely to be more critically dependent on the oscillator circuit design than that of types ha\ ing separate oscillator sections.

    SCREENED TETRODES AND PENTODES The main application of valves in this section is to

    r.f. and i.f. amplification and the operating conditions are normal ratings for this condition. No distinction is made between tetrodes and pentodes because it is im- material in most cases, which type a valve is as long as its characteristics are otherwise suitable. It is only in special applications, where separate use is made of the suppressor grid, that it is important and then the normal characteristics are in any case insufficient to enable a choice of valve to be made. Except where the suppressor grid (g3) is internally connected, it is possible to determine whether a valve is a tetrode or a pentode by reference to the valve-base connections.

    Some of the valves in this section are also listed under Amplifier Triodes. The characteristics given there are the ones obtained with the screen-grid connected to the anode.

    Many of the valves are suitable for use in RC-coupled al. amplifier stages. When so used the voltages applied to the electrodes and the currents obtained are very different from the r.f. amplifier condition. They cannot readily be given, however, since they are as much a property of the circuit values as of the valve.

    OUTPUT VALVES 1 Triodes, beam tetrodes and pentodes are all included

    here with normal maximum operating conditions as output valves for single-valve Class A operation for a.f. application. They are distinguished by the letters (T), (BT) and (P) following the type number and those containing diodes have additionally (SD) or (DD) for single- or double-diode.

    A few contain the elements of an h.t. rectifier in addition and these are distinguished by the letter R.

    In some cases the conditions for a tetrode or pentode operating as a triode with screen-grid joined to anode are given also. This condition can be distinguished by the absence of a figure for screen voltage, but in addition (T) is placed after the type number to indicate that the conditions are those of a triode. The fact that the electrode structure is that of a tetrode or a p


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