Data set 01
2026 Electro Harmonix Gold
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Plate Current
7.5 to 13.5 mA
Plate 250 V; Grid -8.5 V
Voltage - Dual Triode (similar) ·Triode-Triode
ECC82EH
Modern ECC82-family medium-mu twin triode intended for general audio and voltage-amplifier service, including phase-inverter, driver, and control applications.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 12.6 V / 162.5 mA
Description
Miniature twin triode for low-frequency voltage amplification; source co-designates 12AU7A.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 162.5 mA
- Parallel heater voltage
- 6.3 V
- Parallel heater current
- 325 mA
- Series capable
- Yes
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.00235 S
- Amplification factor
- 13
- Max plate voltage
- 300 V
- Max plate dissipation
- 2.75 W
- Max cathode current
- 20 mA
Representative section for two electrically identical triodes.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.00235 S
- Amplification factor
- 13
- Max plate voltage
- 300 V
- Max plate dissipation
- 2.75 W
- Max cathode current
- 20 mA
Second physical triode restored.
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.