Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
6.3 V
Heater current
2.5 A
Peak inverse plate voltage
1700 V
Capacitance
Grid to plate each section
7.5 pF
Power - Triode ·Triode-Triode
6AS7GA
Low-mu twin power triode designed principally for series-regulator service. Each section combines high current capability, low plate resistance, and approximately 13 W dissipation, while published pulse ratings support additional high-current applications.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 8BD
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 2.5 A
Description
6AS7GA is described in the supplied Tung-Sol datasheet as a low-mu twin triode for series-regulator service. Published maximum ratings and core section characteristics were extracted into the technical tables.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 8BD
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 2.5 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
8BD - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12G1 | B | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN22P | B | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN32K | B | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN41G1 | A | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN51P | A | P — Plate (Anode) EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN61K | A | K — Cathode EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN7H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
| PIN8H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8BD |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 280 Ω
- Transconductance
- 0.007 S
- Amplification factor
- 2
- Max plate voltage
- 250 V
- Max plate dissipation
- 13 W
- Max cathode current
- 125 mA
- Rectifier peak inverse voltage
- 1700 V
- Rectifier max heater-cathode voltage
- 300 V
Promoted from published ratings/characteristics; identical repeated sections compressed where applicable.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 280 Ω
- Transconductance
- 0.007 S
- Amplification factor
- 2
- Max plate voltage
- 250 V
- Max plate dissipation
- 13 W
- Max cathode current
- 125 mA
- Rectifier max heater-cathode voltage
- 300 V
Second identical physical triode section; added to align physical section rows with SectionCount.
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
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater voltage
6.3 V
Published table
Heater current
2.5 A
Published table
Plate resistance
280 ohm
EachSection
Transconductance
7000 µS
EachSection
Amplification factor
2
EachSection
Other
Plate voltage
135 V
EachSection
Plate current
125 mA
EachSection
Booster-scanning peak inverse plate voltage
1700 V
EachSection
Booster-scanning maximum plate dissipation
23 W
EachSection