Tube substitute & replacement guide

Direct drop-in replacements and same-family alternatives for the 30 most-rolled audio vacuum tubes. Every page lists the canonical equivalents from primary sources (RCA, Mullard, Tung-Sol), plus same-type tubes with overlapping μ and plate dissipation that could occupy the same socket role with minor rebiasing.

Triodes (14)

Pentodes (5)

Tetrodes (8)

Rectifiers (3)

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