Data set 01
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Voltage
12.6 V
Heater Current
300 mA
Other
Peak Positive Pulse Plate Voltage
1500 V
FrameScanOutput
Voltage - Dual Triode (similar) ·Triode-Triode
12BH7
Medium-mu, relatively high-current twin triode designed for voltage-amplifier and driver duties; its robust triode sections also suit television deflection and other demanding signal applications.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 12.6 V / 300 mA
Description
Low-mu double triode for television frame oscillator/output and Class A amplifier 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
- 9
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- 6.3 V
- Parallel heater current
- 600 mA
- Series capable
- Yes
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
- Plate resistance
- 5300 Ω
- Transconductance
- 0.0031 S
- Amplification factor
- 16.5
- Max plate voltage
- 300 V
- Max plate dissipation
- 3.5 W
- Max cathode current
- 20 mA
Published ratings and characteristics promoted from the supplied Brimar source.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 5300 Ω
- Transconductance
- 0.0031 S
- Amplification factor
- 16.5
- Max plate voltage
- 300 V
- Max plate dissipation
- 3.5 W
- Max cathode current
- 20 mA
Second physical triode section; electrically identical twin section.
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.
Data set 02
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
12.6 V
Nominal
Heater current
300 mA
Nominal
Plate voltage
85250 V
Typical operating conditions
Plate current
16 mA
Typical operating conditions