Result of simulation
Toshiba 2SA1943 is employed as a current booster. This looks like emitter follower
but has a character of collector output, when input current has high impedance.
Voltage level of emitter terminal is transfered base terminal, so plate of 12AX7
is shaked by load voltage movement. As a result, 12AX7 receive high level NFB.
total output character
data
frequency response
1kHz sine wave
excessive input of 1kHz sine wave
triangle wave
when excessive
top view
index