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一、2A3简介2A3是上个世纪二十年代末美国RCA公司研发的直热式三极管,最早时2A3是单板极,灯丝呈四个来回,不久之后出于灯丝容易加工的原因将板极改成了H型的双板极,灯丝呈两个来回两组并联连接。在单管输出的情况下可提供3.5W的输出功率,虽然只有300B的一半,但2A3的音质表现比较平均,仍然很受音响发烧友的喜爱。
2A3 Introduction 2A3 is the last century, the United States R & D RCA direct thermal transistor, the first 2A3 is a single pole, the filament was four back and forth, and soon after the filament is easy to process the reasons for the board to change Has become the H-type bipolar pole, the filament was two back and forth two parallel connection. In the case of single-tube output can provide 3.5W output power, although only 300B half, but 2A3 sound performance is more average, still very popular audio enthusiasts love.