とりあえず手持ちの万能電源ユニット(DC 300V, - TopicsExpress

とりあえず手持ちの万能電源ユニット(DC 300V, 120mA)を使って実験。B電圧だけを取り出してRola 12インチユニットを鳴らしてみました。パワーアンプ用の電源なので、チョーク10H、コンデンサは47μをπ型フィルターにしたもの。フィールド電源としては平滑しすぎで、音の躍動感はいまいちですが、従来の165V電源（本来Telefunken 8インチフィールド用）より磁力は大きく、圧倒的に音飛びがいいようです。ちなみに写真は自作SP専用フォノイコライザー。神の手をもつ心臓内科医の華麗なる配線？12AU7 2本によるCR型フォノイコライザーとラインアンプ。Turn-over 250Hz（ヨーロッパ録音用）、500Hz（米国録音用）切り替え式。12AX7などの高増幅管を使ったフォノイコライザーでは音に芯が出ません。 ところでEL34アンプ、上々の出来のようです。 youtube/watch?v=11LfnzDxFn4

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