this is the second trial after everything is installed on the wooden chassis and fixed of problem.
separate the power supply section with a pair of HW rectifiers with outline : Vdc (B+) and Vac 220, with a connector from Koie-Japan, which connects separately to the amplifier circuit with a transformer for the filament.
I’m still playing with a small current for the 100TH tube and C coupling.
at the beginning, there was still a lot of humming on the INPUT 10Y tube. i have fixed it with used the DC filamnet of 10Y tubes Vdc.
hope for next make be better and better.
ed
