The VR105/30 is a cold cathode voltage stabiliser. The details of its operation are given in the type designation. This tube will stabilise the voltage across it to 105 Volts for output currents between 5 mA and 40 mA. To strike the tube the voltage must exceed 135 V.

As with all such stabilisers the voltage will vary slightly with the current drawn. For this stabiliser the figure is 4 Volts across the current range. For making a stabilised power supply the reference tube would be run at as close as possible to a constant current.

The wide glass tube envelope is 29 mm in diameter and, excluding the IO base pins, is 79 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Stabiliser	Va	mAa
	75	40

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 02 February 2008 {find valves by name}