- Base
- 9QA
- Socket code
- B9A
- Sections
- 2
- Heater
- 5.6 V / 450 mA
- Plate
- S1: 140 V / 1.8 W · S2: 275 V / 2.4 W
- Screen
- S2: 275 V / 0.55 W
- Ik max
- S1: 22 mA · S2: 20 mA
- rP
- S1: 5,400 Ω · S2: 350,000 Ω
- gm
- S1: 11 mA/V · S2: 11 mA/V
- μ
- S1: 78
9 pins - B9A - Small-button Noval 9-contact
Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.
