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DIY 6T9 Push-Pull Tube Amplifier Project
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Frog Tube Preamp 2.1 Version B PCB for DIY -Alembic F2b style – FrogPedals.com
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Behold! My first guitar amp. Champ 5E1 clone with Soviet 6P1 and 6N2 tubes in a 12" box. Lil Champski : r/GuitarAmps
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Randy Miller's 6T9 Compactron Vacuum Tube DIY Audio Amp - Instructions & Schematic
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Russian rod tubes in a battery all-tube mini amplifier prototype | diyAudio
