Sensibly equivalent¶ to:
The PM24M was a replacement type made after WWII and is a directly heated output pentode. The valve would have been designed for the single ended audio stages in AC mains broadcast receivers and can produce 2.8 Watts.
The classic envelope is 47 mm in diameter and, excluding the B5 base pins, is 111 mm tall.
References: Data-sheet, 1040 & 1043. Type PM24M was first introduced in 1932.
Absolute Maximum Operating Conditions¶
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated October 07, 2020. shape:classic construction:pinch type:pentode age:1940.1950 base:b5 heater:4.0v pins:5 pin:1.a pin:2.g1 pin:3.f- pin:4.f+ pin:5.g2