6j1 Tube Preamp Schematic

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Single Tube RIAA preamp too good to be true? - diyAudio

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Tube preamp kit FE-6J1-2.0B

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Project: DIY More Tube-based Pre-Amp Kit (6J1 “Fever” Clone) | Gough's

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Single Tube RIAA preamp too good to be true? - diyAudio