昔エレハモの12au7使ってたけど…
RE: https://akkoma.rilycat.f5.si/objects/76195489-f732-445b-b250-e886d52a5030
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これ
多分中学生のころに作った真空管の低圧アンプ
RE: https://akkoma.rilycat.f5.si/objects/dfcd8e97-2c2c-42ad-ab1a-4f2e697beb87
