6BD7

Duplex-diode high-mu triode designed for detector and Class-A voltage-amplifier service in radio receiving circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: NOVAL
Socket code: B9A
Base pins: -
Nominal heater: 6.3 V / 230 mA

Description

Duplex-diode high-mu triode for detector and Class-A voltage-amplifier service. Published ratings, characteristics, capacitances, and representative operating conditions were extracted from the approved manual page where available.

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: NOVAL
Socket code: B9A
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 230 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

NOVAL - 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

Diode

X-ray radiationInterelectrode capacitances

Max plate voltage: 200 V
Rectifier nominal output current: 0.8 mA

Representative identical diode section; repeated physical diodes compressed.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 58000 Ω
Transconductance: 0.0012 S
Amplification factor: 70
Max plate voltage: 300 V
Max plate dissipation: 1.5 W
Max cathode current: 10 mA

Duplex-diode high-mu triode for detector and Class-A voltage-amplifier service.

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 01

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

Plate voltage
250 V
ClassA; OperatingPoint1
Control-grid bias
3 V
ClassA; OperatingPoint1
Plate current
1 mA
ClassA; OperatingPoint1
Plate resistance
58000 ohm
ClassA; OperatingPoint1
Transconductance
1200 uS
ClassA; OperatingPoint1
Amplification factor
70
ClassA; OperatingPoint1

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Maximum diode plate voltage
200 V
Maximum diode current
0.8 mA

SECTION 2

Triode

Characteristics

Heater voltage
6.3 V
Heater current
230 mA
Plate voltage
250 V
Plate current
1 mA
Transconductance
1200 uS
Plate resistance
58000 ohm
Amplification factor
70