Philips E1T

The E1T is a decadic counting tube developed by Philips which predates the invention of gas-filled Dekatrons. Each pulse advances the tube&rsquo;s internal count by one and generates a voltage spike, which can be used to trigger external actions such as advancing the next stage of a multi-tube counter. Internally, the E1T operates as a small cathode ray tube with a ribbon-shaped electron beam that…