10JA8 Vacuum Tube – Triode-Pentode for TV Circuit Service

The 10JA8 is a triode-pentode combination tube from the "10" series of television service tubes, sharing its heater-string voltage with the 10GN8, 10GV8, and 10HF8 family.

• Tube type: Triode-pentode
• Base: B9A / Noval 9-pin
• Heater: ~10V AC (series-string TV tube family)
• Typical use: Sync, video, or audio circuit duty in television receivers

Part of the broader family of dual-function TV service tubes carrying the 10-volt heater designation.