Voltage Radio Detector Converter ·Diode-Diode-Pentode
6BT8
Double-diode sharp-cutoff pentode designed for detector functions and IF amplification. The pentode provides intermediate-frequency gain while the paired diodes support detector, discriminator, or control-voltage rectification.
- Sections
- 3
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 450 mA
Description
Double diode and sharp-cutoff pentode; pentode section suitable for IF 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
- 6.3 V
- Nominal heater current
- 450 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
3 physical sections, each with unique specifications.
Section 1
Pentode
- Plate resistance
- 300000 Ω
- Transconductance
- 0.0062 S
- Max plate voltage
- 300 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 2 W
- Max screen dissipation
- 0.5 W
Section 2
Diode
No fixed ratings are recorded for this section.
Diode section.
Section 3
Diode
No fixed ratings are recorded for this section.
Diode 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.