Data set 01
1948 Brimar Radio Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater Voltage
6.3 V
Heater Current
300 mA
Voltage Pentode - Remote Cutoff (single) ·Pentode
6SG7
Semi-variable-mu RF pentode intended for controlled high-frequency signal amplification. Its intermediate cutoff characteristic provides gain regulation while preserving useful RF performance in receiver stages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- RTMA 8BK
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 300 mA
Description
Semi-variable-mu RF pentode.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- RTMA 8BK
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
RTMA 8BK - 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
- 900000 Ω
- Transconductance
- 0.0047 S
- Max plate voltage
- 300 V
- Max screen voltage
- 200 V
- Max plate dissipation
- 3 W
- Max screen dissipation
- 0.6 W
Promoted characteristics use the published 250 V plate / 125 V screen operating point.
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
Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
150 V
Published handbook rating
Plate voltage
250 V
ClassA OperatingPoint1
Screen voltage
150 V
ClassA OperatingPoint1
Control-grid bias
2.5 V
ClassA OperatingPoint1
Plate current
9.2 mA
ClassA OperatingPoint1
Screen current
3.4 mA
ClassA OperatingPoint1
Characteristic
Plate resistance
1000000 ohm
ClassA OperatingPoint1
Transconductance
4000 µS
ClassA OperatingPoint1
Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating
Data set 03
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Transconductance
4700 uS
AlternateOperatingPoint
Data set 04
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Voltage
250 V
ClassA
Screen Voltage
125 V
ClassA
Characteristic
Plate Current
1.8 mA
ClassA
Screen Current
4.4 mA
ClassA
Capacitance
Grid-to-Plate Capacitance Maximum
0.003 pF