most of the requirements for MEW, but would be available years earlier. ROTOR was initially adjusted to include these radars starting in 1953, known in production form as the AMES Type 80. But even as these began to be installed, further upgrades to the design pushed the detection range out even further and greatly increased its accuracy. This allowed a single radar to both detect the enemy out to the radar horizon, as well as direct fighters to the targets and get them within range of their Airborne Interception radars. With the introduction of these Type 80 Mark III's, the ROTOR plan was obsolete. There was no longer any need to send information to a central plotting room, as the radars could do everything directly from their displays. Many of the underground bunkers, recently completed at great expense, were sold off as these Master Radar Stations came online in the late 1950s. Carcinotron In 1953 the French electronics firm CSF introduced a new type of microwave-generating vacuum tube, later known as the carcinotron. The carcinotron could generate about a kilowatt of output signal, compared to megawatts for the latest examples of the magnetron and newer examples of the klystron. However, it had the ability to be rapidly tuned across a wide bandwidth simply by changing a single input voltage, something the magnetron could not do and the klystron only within a limited bandwidth. Previously, jamming a radar was a time-consuming process that required an operator to listen for enemy radars on a receiver, isolate signals from potentially threatening radars, and then set up a transmitter on that frequency. This was effective against radars using magnetrons, which cannot change their operational frequency. Against other types of transmitters, the operator on the ground would notice the jamming and change their broadcasts, starting the jamming process over again. If several radars could see the aircraft, keeping the jammers properly tuned could be an impossible task. In contrast, the carcinotron could tune so rapidly that one could simply sweep its output through the bandwidth of any potential enemy broadcasts. As long as this was done quickly enough that every radar would see the jamming signal during the flight time of its pulses, on the order of a few milliseconds, then the signal from the carcinotron would mix with the radar's own and cause false signals to appear on the display. The carcinotron's signal was