Multi-stage-depressed-collector klystron for high-efficiency UHF transmitter in high and medium power range

Summary form only given. The international expansion of UHF TV networks with increasing transmitter power and energy cost saving demands leads to innovative high-efficiency power tube modification and design concepts; such as the multi-stage-depressed-collector (MSDC)-klystron. The MSDC-klystron generation is based on the Philips standard TV-klystrons, 4 generation devices with compact design. The collector section is equipped with a 5 stage-depressed collector system. The tremendous DC-power reduction of the MSDC-technique offers the advantage of optional air-cooling even for medium power TV-klystrons, as for example the Philips depressed-collector development type V186SK