Sensibly equivalent¶ to:
The Ever Ready K30K is a battery triode which is identical to the Mullard PM2HL as Mullard made valves for Ever Ready at this time.
The classic envelope is 33 mm in diameter and, excluding the B4 base pins, is 80 mm tall.
References: Datasheet & 1043. Type K30K was first introduced in 1937.
Absolute Maximum Operating Conditions¶
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated April 26, 2013. shape:classic construction:pinch type:triode age:1930.1940 base:b4 heater:2.0v pins:4 pin:1.a pin:2.g1 pin:3.f pin:4.f