一、前言 VHF正向AGC管在我国已有较长的生产史,但至今大多数厂家仍采用类似高频小功率管CG36的设计版图,最细线条(发射区)为2.5μm。由于集电结面积较小,虽然有利于提高K_p,但在制作过程中也发现不少问题,主要表现为: I. Introduction VHF positive AGC tube in our country has a long history of production, but so far most manufacturers still use a similar high-frequency small power tube CG36 design layout, the thin line (emitter) is 2.5μm. As the collector junction area is small, although conducive to improving K_p, but also found in the production process, many problems, mainly as follows: