The Z803U thyratron is a cold cathode device. The device will conduct when a set voltage is reached on the control electrode and the ionisation within the device will then form an avalanche discharge.

The electrode tr is the trigger, and the electrode p is the priming electrode.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 33 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	a	ic	ic	k	k(1)	p	k	tr	tr

 
Absolute Maximum Operating Conditions

Thyratron	Va	mAa
	290	25

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 10 June 2007 {find valves by name}