1. The nose-mounted equipment included the magnetron transmitter and the soft Sutton tube switch. 2. They took a Sutton tube and disconnected the electron gun and reflector, leaving just the cavity. 3. Sutton tubes were widely used in a variety of forms during World War II and through the 1960s.4. The usable soft Sutton tube arrived in March 1941, and was put into production as the CV43. 5. Post-war intelligence revealed that the Germans were baffled by the purpose of the soft Sutton tube . 6. The Sutton tube is named for one of its inventors, Robert Sutton, an expert in vacuum tube design. 7. He designed a new tube for this purpose, today known as the Sutton tube but then more widely known as a reflex klystron. 8. The soft Sutton tube was used in a circuit known as a " T / R switch " ( or many variations on that theme ). 9. By locating the Sutton tube at the right location along the waveguide to the receiver, the same effect as the branch-duplexer could be arranged. 10. The resulting design, known as a " soft Sutton tube ", went into production as the CV43 and the first examples arrived in the summer of 1941.