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.

 
Pin Connections

B4	1	2	3	tc
	-	-	f	a

 
Absolute Maximum Operating Conditions

Rectifier	Vh	Ah	Va	mAa
	4.0	3.0	1,750	250

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 12 June 2007 {find valves by name}