New-Old-Stock (NOS) tube.

The 2050 is a xenon filled four electrode thyratron with negative control characteristic. This tube is designed for relay applications for grid-controlled rectifier service. With shield grid type of construction a very low precondition grid current flows which allows the use of a high resistance in the grid circuit. The grid control characteristic, because of the inert gas filling, is independent of ambient temperature over a wide range. The effective anode to control grid capacity may be reduced by connecting pin #4 to #8 and connecting the grid resistor directly at the socket terminal.