Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Triode
Construction
Rugged construction
Yes
Voltage - Dual Triode (similar) ·Triode-Triode
6SL7WGT
Premium ruggedized high-mu twin triode for voltage amplification and phase inversion, constructed for demanding service while retaining 6SL7-family electrical characteristics.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 8BD
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 300 mA
Description
Premium high-mu twin triode for voltage amplification and phase inversion. Data was extracted from the supplied Tung-Sol source, including published ratings, characteristics, and operating information.
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
- 300 mA
- 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
- 44000 Ω
- Transconductance
- 0.0016 S
- Amplification factor
- 70
- Max plate voltage
- 300 V
- Max plate dissipation
- 1 W
- Max cathode current
- 20 mA
Published promoted fields populated from printed headings; identical repeated sections compressed.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 44000 Ω
- Transconductance
- 0.0016 S
- Amplification factor
- 70
- Max plate voltage
- 300 V
- Max plate dissipation
- 1 W
- Max cathode current
- 20 mA
Second identical physical triode section; added to align 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
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Maximum plate voltage
300 V
Published handbook rating
Plate voltage
250 V
ClassA OperatingPoint1
Control-grid bias
2 V
ClassA OperatingPoint1
Plate current
2.3 mA
ClassA OperatingPoint1
Characteristic
Plate resistance
44000 ohm
ClassA OperatingPoint1
Transconductance
1600 µS
ClassA OperatingPoint1
Amplification factor
70
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
Triode
Other
Plate Voltage
250 V
ClassA1;EachUnit
Characteristic
Plate Current
2.3 mA
ClassA1;EachUnit
Data set 04
1966 Tung Sol Electronic Tubes 3 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Plate resistance
44000 ohm
PromotedValue
Transconductance
0.0016 A/V
PromotedValue
Amplification factor
70
PromotedValue
AVERAGE CHARACTERISTICS — published value 1
6.3 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
AVERAGE CHARACTERISTICS — published value 2
300 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
LIMITS OF APPLIED VOLTAGE — published value 1
6.31 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
LIMITS OF APPLIED VOLTAGE — published value 2
6 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE VOLTAGE, DC
275 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE DISSIPATION, EACH SECTION
1.1 WATTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE VOLTAGE, DC
250 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID VOLTAGE, DC
-2 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE CURRENT
2.3 MA
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
AMPLIFICATION FACTOR
70
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
TRANSCONDUCTANCE
1.6
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
PLATE RESISTANCE
44 OHMS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID VOLTAGE FOR 10 µA PLATE CURRENT — published value 1
10 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
GRID VOLTAGE FOR 10 µA PLATE CURRENT — published value 2
0 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
D CROSS PLATE RESISTOR OF 2,000 OHMS, WITH APPLIED VIBRATIONAL ACCELERATION OF 2.5 e• SECTIONS — published value 1
2 OHMS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
D CROSS PLATE RESISTOR OF 2,000 OHMS, WITH APPLIED VIBRATIONAL ACCELERATION OF 2.5 e• SECTIONS — published value 2
2.5 OHMS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
Z. GAIN MEASURED AT i.0 VOLTS RMS OUTPUT.
0 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
111111111■■■~■■■■~ Alllllll Ef = 6.3Volts ~'f~~ — published value 1
111111111
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
111111111■■■~■■■■~ Alllllll Ef = 6.3Volts ~'f~~ — published value 2
6.3
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
Other
Maximum plate voltage
300 V
PromotedValue
Maximum plate dissipation
1 W
PromotedValue
Maximum cathode current
20 mA
PromotedValue
MAXIMUM HEATER-CATHODE VOLTAGE
100 VOLTS
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
NOISE OUTPUT VOLTAGE D
200
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.
1. Eo MAXIMUM RMS VOLTAGE OUTPUT FOR FIVE PERCENT (~:) HARMONIC DISTORTION.
1 PERCENT
OCR table transcription; verify against supplied datasheet layout where multiple columns represent operating conditions.