Nobsound® Luxury 6J1*10 Valve Audio Hifi Stereo Pure Tube Headphone Preamplifier Assembled Board Diy
Parameters: Filament voltage (Uf) = 6.3V; Filament current (If) = 0.17A; Anode voltage (Ua) = 120V; Anode current (Ia) 4.5 ~ 12mA; The second gate voltage (Ug2) =…