[w/ subtitles] Manufacture of a 6L6 amp (Part 4: Change to a pentode const. current circuit)

While making a push-pull amplifier using 6L6GC (three connections) in the power amplifier part, we will study push-pull circuits and phase inverting circuits. At first, I was going to finish with the 3rd time, but I was not satisfied with the constant current circuit using resistors. Saw. As a result, it was confirmed that the performance of the phase inverter circuit was improved. Vacuum tubes can be used for a variety of purposes, not just for amplification. I learned another lesson!