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The 1B37 is a 3 cm (9.5 GHz) TR cell designed to fit into waveguide. At the time this was probably Old English, later WG16.
A transmit pulse would ionise the chamber acting as a short circuit to close the receiver input port. As the pulse collapsed the ionisation would collapse and the receive port would be open for the reflected signal.
A full description of these 3 cm TR cells can be found in the attached book chapter 4 pp 115-138.
The TR cell would plug into the waveguide.
The closed end.
The window in the active end.
The WG16 envelope is 1 inch by 0.5 inches mm.
Reference: Data-sheet. Type 1B37 was first introduced in 1945.


Absolute Maximum Operating Conditions
General Notes
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 13, 2021.
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