02-05-2020, 11:10 AM
Dan
Thinking about this a bit more, if you add a capacitor between the AC044 grid connection and yourMOSFET gate, you'll block the DC bias applied to the valve's grid and can arrange the MOSFET bias to suit. You can't directly use Al's arrangement though as there is no screen grid supply - the AC044 triode doesn't have a screen grid.
John
Thinking about this a bit more, if you add a capacitor between the AC044 grid connection and yourMOSFET gate, you'll block the DC bias applied to the valve's grid and can arrange the MOSFET bias to suit. You can't directly use Al's arrangement though as there is no screen grid supply - the AC044 triode doesn't have a screen grid.
John
