Data set 01
2026 Electro Harmonix
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Input Capacitance
4 pF
Output Capacitance
5.5 pF
Other
TransferCapacitance
0.05 pF
Voltage Pentode ·Pentode
EF806SG
Modern low-noise miniature pentode designed specifically for input stages of sound-recording and sound-reproducing equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 200 mA
Description
Low-noise miniature pentode for input stages of sound recording and reproducing equipment.
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
- 6.3 V
- Nominal heater current
- 200 mA
- 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
Pentode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.002 S
- Max plate voltage
- 300 V
- Max screen voltage
- 200 V
- Max plate dissipation
- 1 W
- Max screen dissipation
- 0.2 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.
Data set 02
2026 Tungsol Rebrand
Published operating points and test conditions from this source.
SECTION 1
Pentode
Application
Application
SoundRecordingInputStage text
Application
SoundReproducingInputStage text