As a major producer of electron tubes, my country has produced many excellent electron tubes, many of which are suitable for audio amplification. There is one electron tube that is worth recommending in terms of both price and effect. This tube is the FU50 produced in my country. It has also been widely used in broadcasting and communications. When FU50 is connected as a triode, its characteristic curve is closer to the famous tube 300B. When it is connected as a triode, its playing effect is also very good. In addition, the price is not expensive, so it is worth recommending to all audio enthusiasts.
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