Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Diode
Application
Application
Detector_DelayedAVC text
Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
7B6
Double-diode triode combining radio detector and AVC rectification with subsequent voltage amplification. The paired diodes handle signal and control-voltage functions while the triode provides receiver audio or voltage gain.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 3
- Base
- 8W
- Socket code
- B8G
- Base pins
- 8
- Nominal heater
- 7 V / 320 mA
Description
A duodiode high-mu triode suitable for detector and audio-amplifier service; its two diodes and triode share a common cathode.
Socket description
Loctal 8-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 8W
- Socket code
- B8G
- Base pins
- 8
- Nominal heater voltage
- 7 V
- Nominal heater current
- 320 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
8W - 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
Diode
X-ray radiationInterelectrode capacitances
- Max cathode current
- 1 mA
- Rectifier nominal output current
- 1 mA
Published promoted fields populated by semantic heading; identical repeated physical sections compressed.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 91000 Ω
- Transconductance
- 0.0011 S
- Amplification factor
- 100
- Max plate voltage
- 250 V
Published promoted fields populated by semantic heading; identical repeated physical sections compressed.
Section 3
Diode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Physical diode section added during approved section-structure reconciliation.
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
1948 Brimar Radio Valve Manual
Published operating points and test conditions from this source.
SECTION 2
Triode
Characteristics
Anode Voltage
250 V
Anode Current
1 mA
Control Grid Voltage
-2 V
Cathode Bias Resistor
2000 ohm
Data set 03
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 2
Triode
Other
HeaterVoltageNominal
7 V
Nominal
HeaterCurrentNominal
320 mA
Nominal
Plate Voltage
250 V
ClassA
Data set 04
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 2
Triode
Other
Typical plate voltage
250 V
ClassA
Typical grid voltage
-2 V
ClassA
Typical plate current
0.9 mA
ClassA
Characteristic
Plate resistance
91000 Ohm
Section1
Transconductance
1100 uS
Section1
Amplification factor
100
Section1
Data set 05
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Diode
Characteristic
Minimum Diode Current
0.8 mA
EachDiode;AppliedVoltage=10V