Data set 01
1959 Ediswan
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
Cascode / high-frequency amplifier
Voltage - Dual Triode (similar high frequency) ·Triode-Triode
7EK7
Twin triode intended for cascode-style high-frequency amplifier service, providing two triode sections suited to RF front-end amplification.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 7 V / 300 mA
Description
Twin triode for cascode-style high-frequency amplifier service.
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
- 7 V
- Nominal heater current
- 300 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
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0086 S
- Amplification factor
- 26
- Max plate voltage
- 250 V
- Max plate dissipation
- 2 W
- Max cathode current
- 16 mA
Grounded-cathode input section in VHF cascode RF amplifier. Ediswan/Mazda 7EK7: plate voltage maximum 250 V, plate dissipation maximum 2 W per section, cathode current maximum 16 mA per section. Published typical cascode operating conditions depend on circuit bias configuration.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0086 S
- Amplification factor
- 26
- Max plate voltage
- 250 V
- Max plate dissipation
- 2 W
- Max cathode current
- 16 mA
Grounded-grid output section in VHF cascode RF amplifier. Ediswan/Mazda 7EK7: plate voltage maximum 250 V, plate dissipation maximum 2 W per section, cathode current maximum 16 mA per section. Published typical cascode operating conditions depend on circuit bias configuration.
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.