Data set 01
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater Voltage
6.3 V
Heater Current
150 mA
Application
LowMicrophonyHighGainAFAmplifier
Voltage Pentode ·Pentode
6BR7
Low-microphony pentode for sensitive early stages of high-gain audio amplifiers, including microphone and preamplifier circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 9BC
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 150 mA
Description
Low-microphony amplifier pentode for early stages of high-gain audio-frequency amplifiers.
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
- 9BC
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
9BC - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 2500000 Ω
- Transconductance
- 0.00125 S
- Max plate voltage
- 300 V
- Max screen voltage
- 125 V
Promoted from the printed maximum-rating/characteristic columns; additional operating-point data retained as section 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.
Data set 02
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
250 V
ClassA
Screen voltage
100 V
ClassA
Control-grid voltage
-3 V
ClassA
Plate current
2.1 mA
ClassA
Screen current
0.6 mA
ClassA
Characteristic
Plate resistance
2500000 Ω
ClassA
Transconductance
1250 µS
ClassA