The ZT1011 or XR1-1600A is a triode Thyratron designed for industrial control applications. The peak current is 20 Amps. It was the successor to the XR1-1600.
The UX4 base also has a locating pin for bayonet bases.
The internal electrodes are separated with ceramic insulators due to the high voltages involved.
The serial number is 24515.
The top cap with re-entrant anode.
The wide glass tube envelope is 38 mm in diameter, and excluding the UX4 base pins is 102 mm tall.
Reference: Data-sheet. Type ZT1011 was first introduced in 1961. See also1961 adverts.
