Data set 01
2026 Tungsol Rebrand
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Power Output
-
HI-FI audio output; Class A/push-pull data published
Power - Beam (NOT sweep) ·BeamPower
6L6GCSTR
Modern 6L6GC STR beam tetrode intended for high-power hi-fi and musical-instrument audio output stages, supporting demanding Class A and push-pull operation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7AC
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 900 mA
Description
6L6GC STR beam tetrode for low-frequency power amplification in HI-FI audio output stages.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7AC
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 900 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7AC - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Pin 1 | — | NC | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN2Pin 2 | — | H — Heater | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN3Pin 3 | A | P — Plate (Anode) | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN4Pin 4 | A | G2 — Screen Grid | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN5Pin 5 | A | G1 — Control Grid | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN7Pin 7 | — | H — Heater | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN8Pin 8 | A | BP — Beam-Forming PlateGroup AC8 | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN8Pin 8 | A | K — CathodeGroup AC8 | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
Section ratings
1 physical section, each with unique specifications.
Section 1
Beam Power
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0052 S
- Max plate voltage
- 500 V
- Max screen voltage
- 450 V
- Max plate dissipation
- 30 W
- Max screen dissipation
- 5 W
Published ratings and characteristics promoted from the approved source.
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.