Thyratron
The 885 Vacuum tube is an argon filled high-stability
thyratron intended for use as a horizontal sweep
oscillator in oscilloscope circuits. It has a 300V peak
plate voltage and 75mA average current.
It was first developed in April of 1927. Chatham, GE, RCA
and Westinghouse are the known manufacturers.
Electrical Data:
Heater Voltage .................... 2.5 V
Heater Current .................... 1.5 A