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: Data-sheet & 1040. Type GU50 was first introduced in 1940. See also 1940 adverts.
Absolute Maximum Operating Conditions¶
Updated January 07, 2022.