Data set 01
1959 Ediswan
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
Video output / sync separator triode
SECTION 2
Beam Power
Application
Application
Video-output beam tetrode
Power - Beam (NOT sweep) ·BeamPower-Triode
9GB8
Combination medium-mu triode and high-slope beam tetrode designed for television video-output and sync-separator service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- -
- Nominal heater
- 9 V / 300 mA
Description
Combined medium-mu triode and high-slope beam tetrode for video-output or sync-separator service.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B9A
- Base pins
- -
- Nominal heater voltage
- 9 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.014 S
- Amplification factor
- 18
Published source ratings and characteristics promoted where applicable; additional data retained as parameters.
Section 2
Beam Power
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0075 S
Published source ratings and characteristics promoted where applicable; additional data retained as parameters.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.