Abstract :
The construction of a gas-filled glow discharge display tube and its limiting operating conditions are discussed. A graphical method is described for determining the correct working point in a typical simple circuit. A number of circuits are described which show the application of the tube to typical counting systems with counting speeds ranging from a few cycles/second to 2 Mc/s. It is shown that, provided suitable precautions are taken, end of life can be predicted and failure in service is unlikely.