Voltage Triode Pentode ·Pentode-Triode
9BR7
Triode-pentode combination tube; available source material does not establish a narrower functional application confidently.
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- -
Description
The 9BR7 is a triodepentode described in the approved English datasheet.
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
- -
- Nominal heater current
- -
- 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
No fixed ratings are recorded for this section.
Published values promoted where clearly attributable to this section.
Section 2
Pentode
No fixed ratings are recorded for this section.
Published values promoted where clearly attributable to this 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.