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EEVblog #837 - Reverse Engineering A Valve Headphone Amplifier
Dave reverse engineers the XuanZu X2-U808 Hi-Fi Headphone Amplifier to see if the valves actually do anything.
What is the circuit topology?
E180F (6J9) pentode valve datasheet: http://frank.pocnet.net/sheets/009/e/E180F.pdf
Doug Ford's Microphone design series: https://www.youtube.com/playlist?list=PLvOlSehNtuHv98KUcud260yJBRQngBKiw
Reverse Engineering How-To video: https://www.youtube.com/watch?v=lJVrTV_BeGg
Forum: http://www.eevblog.com/forum/blog/eevblog-837-reverse-engineering-a-valve-headphone-amplifier/
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