01-02-2021, 02:54 PM
(This post was last modified: 01-02-2021, 02:57 PM by Murphyv310.)
I understand the calcs but if the filaments are series fed and isolated, the "cathode" (centre tap) would then return to ground via the "Cathode" bias resistor network and NFB injected as is common practice. If nominal cathode current was less than 1ma I can't see why there would be a swing that would be an issue. Is not the 1j29b filament 25ma in series connection?
With an isolated supply for filaments the AC component of the NFB would be evenly distributed across the full filament or am I missing something?
With an isolated supply for filaments the AC component of the NFB would be evenly distributed across the full filament or am I missing something?
