- Base
- 9EX
- Socket code
- B9A
- Sections
- 2
- Heater
- 10.7 V / 450 mA
- Plate
- S1: 250 V · S2: 250 V / 7 W
- Screen
- S2: 250 V / 1.8 W
- Ik max
- S2: 50 mA
- rP
- S2: 20,000 Ω
- gm
- S1: 2.5 mA/V · S2: 6.4 mA/V
- μ
- S1: 70
9 pins - B9A - Small-button Noval 9-contact
Miniature triode-pentode used for television vertical-deflection oscillator/amplifier service and AF voltage/power amplification. It combines a small-signal triode with a power pentode in one envelope.