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813 Beam Power Tube and Data Sheets

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813 triode connected SE

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813 Tube Amplifier Schematic

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813 Amplifier Schematic

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813 Linear Amplifier by KG7TR

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300B tube single-ended Class A amplifier circuit diagram | Valve

813 Amplifier Schematic

813 Amplifier Schematic

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old 813 homebrew Amp