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Vacuum Tube Audio

Projects
DHT Filament Regulator
DHT Pre-amp
45/6J5 Single-ended Mono Blocks
12B4-A Pre-amp
6C6 Phono Pre-amp
Testing/Specifications
Reference Material
Old Literature
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Getter Materials 1950

Tubes or Transistors 1959

Miniature Battery Tubes 1940

Vacuum Tubes and Their Uses 1926

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