RSGB
Foreword and Copyright

FOREWORD
         
It is hoped that this booklet will meet the need for a source of 
information on the commercial equivalents and the manufacturers of the 
numerous CV coded valves, cathode ray tubes and semiconductor devices 
now available to the radio amateur.
         
The opportunity has been taken in this Edition to correct a few errors 
which appeared in previous Editions and to add a large number of new 
types which have appeared recently.
         
A revised system of coding the valve classification has been introduced 
which it is believed will be found simpler to use and increase the 
usefulness of the booklet. Certain of the older types have been added to 
the lists to make the information more complete but valve types which are
unlikely to be used by the average amateur have been omitted.
         
The CV lists are Crown Copyright reserved and are reproduced by 
permission of the Controller, H.M. Stationery Office.
                                                                   G.R.J.

Compiled by:     G. R. JESSOP,  AMIERE,  G6JP
General Editor:  John A. Rouse,  G2AHL

Copyright 1967 RADIO SOCIETY OF GREAT BRITAIN

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