2A3 / 300B switchable amp test ; 2A3 mode sound. A Women outside of Window by Jo, YongPhil 허송세월공학실험실
It took lots of time to have perfect compatibility between 2 types of tubes with a single 4PDT switch 4접점 토글스위치 하나만 사용하여 허약한 2A3와 강한 300B를 완벽한 호환성 가지게 하는 작업은 쉽지 않았다. 두 진공관의 공존에 의해 발생하는 신호의 간섭 그리고 높은 전압을 2A3의 최대정격을 초과하지 않도록 하는 것이 설계의 핵심이다. 허송세월 공학실험실
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