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The CX1157 is a hydrogen-filled tetrode thyratron with ceramic envelope, featuring low jitter and low anode delay time drift. Suitable for use at high pulse repetition rates and in applications requiring ruggedness and compactness. A hydrogen reservoir operating from the heater supply is incorporated.
Its use would be to supply a pulse of power to the RF generating magnetron in a radar transmitter, or as a crowbar to protect other equipment from excessive voltage, or for use in particle physics experimentation.
The valve features a reservoir heater which is 6.3 Volts at 1.5 Amps and the tube will heat from cold in 3 minutes. As this is a switch to provide pulses of energy the average anode current is very low compared to the peak value. The latter is 350 Amps maximum and the peak output power is 3.5 MW. The rate of rise of the output pulse after triggering is 2500 Amps per milli-second. The main heater is oxide coated and the cathode is connected internally to one end of the heater.
It is thanks to an email from Matt that we have details for this device.
The wide ceramic tube envelope is 43  in diameter with the maximum diameter being 63 mm. The overall height is 89 mm.
Reference: Data-sheet.


Absolute Maximum Operating Conditions
The Thyratron
PDF scanned from an original document held by the museum
Updated February 17, 2022.
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