Finished the 4-65a filament regulators. Filament noise is only 1.5 mVrms at full load (3.5A):
Category: Output Stage
814/VT-154 triode mode curves
First set of characteristic curves in triode mode:
A first attempt to produce a SPICE model was quite successful:
The valve glowing in the dark, nice….
4-65a glowing in the dark
These were taken at my lab in the attic during the summer evening twilight.