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从“全触点覆盖开关”(以前称“排列转换面板”)至“无触点覆盖开关”(由蔡安民同志设计)确实是一大革新,可以克服“全触点覆盖开关”转换插头接触不良及操作不便之弊病。然而,“无触点覆盖开关。所需结型场效应晶体管数量太多(对24道模拟磁带、备用24道,需场效应晶体管1200只),造价高昂,因此,许多人怀疑其是否具有实用价值。本设计的主要目的在于节省管子,降低造价,使之付诸实用。因本设计系以“无触点覆盖开关”为基础,增加了一些“触点开关,”故暂称为“混合式覆盖开关。”
From the “Full Contact Override Switch” (formerly “Alignment Switch Panel”) to the “Contactless Override Switch” (designed by Comrade Chua Anmin) is indeed a revolution that can overcome the “Full Contact Override Switch” contact plug Bad and inconvenient operation of the drawbacks. However, the “contactless overlay switch.” The number of junction field effect transistors required is too high (24 analog tapes, 24 spares, and 1200 for field effect transistors), which is costly and therefore many doubt whether it is practical Value. The main purpose of this design is to save pipe, reduce the cost, make it practical. Because of the design of the Department of “non-contact covered switch” as the basis, an increase of some “contact switch,” so tentatively called “mixed Overlay switch. ”