Tube-number record
EF 8010
0 archive entries
BrandTelefunken
ClassRemote cutoff RF-pentode
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated, DC-AC heating
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2.5 W
Grid 2 Voltage250 V
Grid 1 Voltage-50 V
Cathode Current20 mA
H-C Voltage150 V
Audio Performance
Key Features
- Long life
- Tight tolerances
- Vibration and shock proof
- Cathode free from interface
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Measuring Condition | 200 V | 12500 | 500000 | — | 12 mA |
| Typical Operation (170V) | 170 V | 14000 | — | — | 14 mA |
| Typical Operation (200V) | 200 V | 12500 | — | — | 10.5 mA |
Application Notes
The cathode establishes no interface even when heated without plate current for long periods. Operation with cathode and/or screen grid resistor is recommended.
Datasheets
Datasheet: EF8010.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results