The GP2 is a general purpose triode from 1926 and features a 2.0 Volt and a maximum anode voltage of 150 Volts. The metal loaded paint has started to become detached from the glass and the internal structure is partly visible.
Primrose valves are not found in Thrower.
The bright anode, single hairpin filament and grid winding.
The balloon envelope is 38 mm in diameter, and excluding the B4 base pins is 83 mm tall.
Reference: Observation. Type GP2 was first introduced in 1926.
Absolute Maximum Operating Conditions¶
Updated October 08, 2019. shape:balloon construction:pinch type:triode age:1920.1930 base:b4 heater:2.0v pins:4 pin:1.a pin:2.g1 pin:3.f pin:4.f