2018年4月27日金曜日

真空管の紹介です。

STC4212E  フイラメント14V6A

東芝 5T31  フイラメント7,5V12A

何れも直熱3極管


入手の難しい真空管になりました。




5T31PPモノラルアンプ



STC 4212Hモノラルパワーアンプ






1 件のコメント:

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