Data set 01
199X Svetlana
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
2.5 A
Nominal
Maximum Plate Voltage
250 V
Maximum Plate Dissipation
13 W
Power - Triode ·Triode-Triode
6AS7
Dual low-mu high-current power triode developed primarily for series-pass voltage-regulator service. Very low plate resistance and substantial current capability make its two sections effective control elements in stabilized DC supplies and other high-current circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 8BD
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 2.5 A
Description
The Svetlana™ 6AS7 is a glass envelope, dual power triode with high transconductance and high plate current capacity. Each triode has a plate dissipa- tion rating of 13 Watts with convection cooling. It is intended for low distortion audio frequency power amplification service in either single or push-pull/parallel tube applications. The Svetlana 6AS7 has an indirectly-heated unipotential cathode. The heater may be DC operated for the absolute best hum/noise performance. The Svetlana 6AS7A was originally designed as a series pass tube in regulated power supplies. Low plate resistance makes it an excellent choice in OTL and other high perfor- mance audio circuits. Close manufacturing specification tolerances and improved process- ing provides enhanced reliability and superior sonic performance. The Svetlana 6AS7 is manufactured in the Svetlana factory in Russia, and is designed to be a direct replacement for any 6AS7.
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
- 0.0055 S
- Max plate voltage
- 250 V
- Max plate dissipation
- 13 W
Representative promoted row for two identical physical triode sections.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 280 Ω
- Transconductance
- 0.0055 S
- Max plate voltage
- 250 V
- Max plate dissipation
- 13 W
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.