The U201 is a half wave HT rectifier designed for use on a 200 mA heater chain. The maximum reservoir capacitor is 16 µF and the minimum series resistance needs to be 47 Ohms to prevent damage to the device by excessive current peaks.

The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 80 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	ic	h	-	-	a	-	h	k

 
Absolute Maximum Operating Conditions

Rectifier	Vh	Ah	Va	mAa
	20	0.2	250	90

Thanks to Frank Philipse for supplying the above datasheet

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