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The CV1297 is a radar T/R cell designed to operate at 2.925 to 3.075 GHz. The prototype was the CV2739.

The primer electrode is present to maintain a low level ionisation and thus to speed up the main breakdown of the gap when a transmit pulse commences. This breakdown effectively isolates the sensitive receiver input stages from being destroyed by the magnetron transmit energy that can be 500 kW at its peak.

The copper discs would be sealed into a cavity resonator. The primer supply connects to screw top cap.

The wide glass tube envelope is 29 mm in diameter and, including the base, is 126 mm tall.

Reference: Data-sheet. Type CV1297 was first introduced in 1955.

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.