Thank you all for your advice and experiments.
It looks good, so I was wondering why I hadn't seen it.
As for the noise, I am not too worried.
in last year I tried a noise generator with zener diode.
However, did not get the Noise level that I expected,
Anyway,
I will try this style with 2SC3357 during the New Year holidays.
I don't have a low voltage zener diode so will try it with LEDs.
of course it may replace to the common resistor divider.
I wish you all peace and health in 2025.
73, Hisami 7L4IOU
