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近几年来,速调管技术已发展到使其效率提高到磁控管或其它交叉场器件一般所期望的水平。腔和漂移部分参数的精确选择以及采用二次谐波阻抗和电子注空间电荷力,已使固定频率的速调管的效率高达65%～70%。例如,VKS-7783,这是一只工业加热应用的速调管,效率已达到70%。它是一只固定调谐的管子。X-3074是-只100千瓦固定频率速调管,也已获得70%的效率。但是,为了获得可观的调谐范围,必须使设计参数做出一些牺牲并且使效率略低一点。
In recent years, klystron technology has been developed to increase its efficiency to the level generally desired for magnetrons or other cross-field devices. The precise choice of cavity and drift parameters, as well as the use of second harmonic impedances and electron beam steric charge forces, have resulted in fixed frequency klystrons reaching 65% to 70% efficiency. For example, the VKS-7783, a klystron for industrial heating applications, is 70% efficient. It is a fixed tuning tube. The X-3074 is a 100 kW fixed frequency klystron tube that has also achieved 70% efficiency. However, in order to obtain a significant tuning range, the design parameters must be sacrificed and the efficiency somewhat lower.