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DIY Single-Ended (SE) KT88 / 6L6 / EL34 / 6CA7 Tube Amplifier
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2x4W Stereo Tube Amplifier Circuit - Amplifier Circuit Design
6L6 SE (12AX7 and 6L6) Valve Tube Amplifier Complete DIY Kit Stereo | eBay
DIY Single-Ended (SE) KT88 / 6L6 / EL34 / 6CA7 Tube Amplifier
