Data set 01
2026 Electro Harmonix
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Cathode Current Maximum
90 mA
Power - Beam (NOT sweep) ·BeamPower
7591AEH
Modern 7591A-family beam tetrode designed for low-frequency power amplification in hi-fi audio output stages, with substantial plate dissipation and high transconductance for compact high-power amplifiers.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 8
- Nominal heater
- 6.3 V / 1.07 A
Description
Beam tetrode power tube for low-frequency power amplification in HI-FI audio output stages.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 1.07 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Beam Power
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0099 S
- Max plate voltage
- 550 V
- Max screen voltage
- 440 V
- Max plate dissipation
- 19 W
- Max screen dissipation
- 4.5 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.