12BW4
The 12BW4 is a dual diode vacuum tube where both diodes share a common cathode. It has a 12.6 V heater and a B9A (Noval) miniature 9-pin base.
The 6BW4 is identical but with a 6.3 V heater.
Data
- Sylvania 6BW4 and 12BW4 Datasheet (PDF)
- 12BW4 @ radiomuseum.org
