5C22

5C22 is also designated 6279.

The 5C22 is a hydrogen thyratron with a positive control characteristic.

Construction

The 5C22 has indirect heating and uses a Super Jumbo base with bayonet. Its net weight is 280 g, and its shipping weight is 1200 g.

Ratings

The heater requires 6.3 V ± 7.5%, drawing between 9.6 A and 11.6 A at that voltage, with a minimum warm-up time of 5 minutes. The anode voltage minimum is 4.5 kV, with a maximum anode voltage and maximum inverse anode voltage of 16 kV. The minimum inverse anode voltage is 0.05 times the anode voltage. Maximum anode pulse current is 325 A, maximum anode current is 200 mA, and the maximum rate of anode current rise is 1500 A/µs. The maximum pulse duration at half amplitude is 6 µs, and the maximum dissipation factor is 3.2 × 10^9. Maximum time jitter is 0.02 µs. Grid inverse voltage and maximum grid inverse voltage are both 200 V. Minimum grid pulse duration is 2 µs, maximum grid pulse rise time is 0.5 µs, and maximum grid resistance is 500 Ω.

Operating Conditions

The ambient temperature range is -50°C to +90°C. The mounting position is arbitrary, with clamping recommended at the base. The return lead of the anode and grid circuits should be connected to pin 4.

Applications

The Philips datasheet states that the 5C22 is intended for service in pulse modulator circuits of microwave radar systems. The same datasheet suggests its properties also suit applications such as a frequency converter for high-efficiency induction heating, shock excitation of tuned circuits, pulse time modulation circuits, and use in control circuits.

Handling Notes

According to the Philips datasheet, cooling of the anode lead is permissible, but no cooling stream of air should be directly applied to the tube envelope. The tube should be kept away from strong fields which could ionise the gas in the tube. The dissipation factor limit applies to pulse repetition rates not far in excess of 1000 pulses per second. The time jitter was measured at 5 kV in a typical circuit; under practical operating conditions, the average value of the anode time jitter is approximately 0.004 µs.

Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.

Original manufacturer datasheets for 5C22, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• **PHILIPS**
• **AMPEREX ELECTRONIC CORPORATION** (filed under 6279)