THE MULLARD WORLD SERIES VALVES (v) - OUTPUT PENTODE PL82

With the introduction of wide angle picture tubes in the early 1950s came a commensurate increase in scanning deflection power after all going from 55o to 70o took some power -  but how to get that power?  This called for a new Mullard World Series valve - the PL82 output pentode.

This valve was specifically designed in 1951  as a frame timebase output valve capable of maintaining 70o frame deflection when operated from a 170V HT line.