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一、放大电路的组成VT-25、VT-62都是真空管生产厂为无线电通讯设备研制的发射管。过去曾有WE等多家生产厂在生产这种型号的真空管。RCA生产的与VT-62参数相同的管子型号为801。VT-25、VT-62都是真空直热式三极管,灯丝电压都为7.5V。过去曾用这两种型号的管子做过音频功率放大器的功率放大管,其音质都不错。本文介绍一款可兼用VT-25、VT-62/801的单声道推挽音频功率放大器。之所以将放大器设计成单声道不是立体声是因为考虑到变压器的重量较重,如果做成立体声放大器的话,放大器的重量太重。
First, the composition of the amplification circuit VT-25, VT-62 are vacuum tube manufacturer for the development of radio communications equipment launch tube. In the past there have been WE and many other manufacturers in the production of this type of vacuum tube. RCA produces the same tube model number as the VT-62 parameter. VT-25, VT-62 are vacuum direct thermal transistor, the filament voltage is 7.5V. In the past have used these two types of tubes have done audio power amplifier power amplifier tube, the sound quality is good. This article describes a VT-25 VT-62/801 single-channel push-pull audio power amplifier. The reason why the amplifier is designed to mono is not a stereo because of the weight of the transformer is considered heavy, if made of stereo amplifier, the amplifier is too heavy.