The CV1841 is an X-Band TR switch used to protect the sensitive receiver front end from the radar transmit pulse. Operation is between 9.32 and 9.5 GHz.
The QG identifies the maker as English Electric Valve Co., location unknown.
The WG16 flange is sealed as the switch relies for speed of operation on the ionisation of the low pressure gas within. The priming voltage keeps the gas just below breakdown.
The sealing pip is metal cased on the broad face of the waveguide.
The commercial Type designation BS52 and maker's name.
