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对于喜爱真空管的人来说,古老的直热式三极管300B无疑极具诱惑力,不过稍微有些遗憾的是输出功率偏低,单端输出
For those who love the vacuum tube, the ancient direct thermal transistor 300B undoubtedly very attractive, but somewhat regrettable is the output power is low, single-ended output