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Headphone Amp. "Fire Capsules 845 class-D"

真空管845を採用したD級ヘッドフォンアンプ Fire Capsules 845


I have tried to use the vacuum tube, PSVANE 845 pared. I had tried my test circuits for the vacuum tubes 845, also. It seems to have lower noise than SV811-10. I feel it good.
Then, now, I known that the 845 amplifier can amplify the PWM signal made from the music, by my experiment. I could heard the sound by my headphone. My oscilloscope shows the output signal with yellow wave, and the input PWM signal with blue wave. Maybe, so, I will try to make a class-D amplifier by the vacuum tube, also. I may feel like retro modernism.