The GU50 mercury vapour half wave rectifier sits on a B4 base.
The maximum reservoir capacitor is 4 µF. The filament is a twin horseshoe of corrugated tape. The anode is a short dustbin lid connected to, and supported by the top cap.
The classic envelope is 47 mm in diameter and, excluding the B4 base pins, is 123 mm tall.
References: Datasheet & 1040. Type GU50 was first introduced in 1940.
Absolute Maximum Operating Conditions¶
Updated April 03, 2015. shape:classic construction:pinch type:rectifier.mv age:1940.1950 base:b4 heater:4.0v pins:4 pin:1.- pin:2.- pin:3.f pin:tc.a