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12AU7-6CG7 Headphone amplifier

12AU7-6CG7 Headphone amplifier

This is my DIY build headset class-A tube amplifier that uses an OTL (Output Tra…

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Philips B6X12A valve radio

Philips B6X12A valve radio

This is my postwar Philips B6X12A valve radio from 1962. The amplifier is design…

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