The VPT4 is a vari-μ RF pentode. The heater is the original UK standard for indirectly heated valves of 4.0 Volts at 1.0 Amps.
The reverse is plain gold metal loaded screening paint.
The classic envelope is 38 mm in diameter and, excluding the B5 base pins, is 105 mm tall.
Reference: 1043. Type VPT4 was first introduced in 1933.
Absolute Maximum Operating Conditions¶
Updated October 08, 2019. shape:classic construction:pinch type:pentode age:1930.1940 base:b5 heater:4.0v pins:5 pin:1.g2 pin:2.g1 pin:3.h pin:4.h pin:5.k.g3 pin:tc.a