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目前，国产超短波治疗机的主要产品多数采用ＦＵ—８１１电子管作为高频振荡管。该管为中功率超短波发射管，它的阳极引出铜线与粘在玻璃壳上端的金属铜帽焊接在一起。尽管在机器设计上在电子管阳极帽上加装了散热器，但在超短波治疗机工作时，由于多种因素仍会造成阳极帽温度
At present, most of the main products of domestic ultra-short-wave therapeutic machines use FU-811 electron tubes as high-frequency oscillation tubes. The tube is a medium-power ultrashort-wave launch tube, and its anode lead-out copper wire is welded together with a metal copper cap stuck to the upper end of the glass shell. Although a radiator is installed on the anode cap of the tube in the machine design, the anode cap temperature may still be caused due to various factors during the operation of the ultrashort wave treatment machine.