The 85A2 is a small, special quality voltage stabiliser. The striking voltage is 115 Volts and the maintaining voltage is 85 Volts. For a tube current variation of 1 mA to 10 mA the voltage regulation is 4 Volts.

This valve would have been used to directly stabilise the voltage for an oscillator or be employed as a voltage reference for a stabilised supply. In the latter case the tube would be operated at constant current.

The thin glass tube envelope is 17 mm in diameter and excluding the B7G base pins, is 46 mm long.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	a	k	k	k	a	ic	k

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This exhibit was last updated on 20 March 2005