8056
The 8056 is a low-voltage Nuvistor triode with a 6.3 V heater.
It is used in the 10A1 and the 422. It can sometimes be replaced with a MPF102 FET.
Links
- RCA 8056 Datasheet (PDF)
- Siemens 8056 Datasheet (PDF)
- RCA Nuvistor Reference (PDF)
- 8056 @ radiomuseum.org