The CV107 is an S-Band (3.3 GHz) radar TR cell designed to protect the receiver from the transmit pulse by ionising the gap and shorting out the receiver input. As these have to operate at the pulse repetition rate of the radar the water vapour filling is kept ready to ionise by a primer voltage.
This exhibit was made by AB Svenska Elektronror and it is also marked SV. Pat.123805. This is the same as GB patent 589023 and US patent 2,738,418. It applies to the original work done on TR cells by Cooke, Skinner and Ward, and was applied for April 1942.
The CV197 is similar but has a higher internal pressure.
The discs connect to the waveguide. The discs are 46[k[mm in diameter and the separation is 17 mm.
The full length is present to house the correct quantity of gas.
The primer cup close to one electrode allows the gas to be held just below ionisation point.
The wide glass tube envelope is 28 mm in diameter, and including the screw cap is 122 mm tall.
