![Shocked :shock:](./images/smilies/icon_eek.gif)
I plan to use a 112A and Hammond 126C interstage to drive the A2 buffer that will drive 833a (GU-48).
Original plan was to use filament bias on the 112A, but I read somewhere (can't find it now
![Sad :(](./images/smilies/icon_sad.gif)
When I did a 26 preamp years ago I did grid bias with a 9v battery (-9v) and used a Rod Coleman module for the filament.
Any opinions would be welcome.
![Smile :)](./images/smilies/icon_smile.gif)