Tube-number record
E 80 CF
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E 80 CF is a tube type in the TubeDatabase archive (class: Triode-Pentode). Recorded specifications: brand Siemens, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 275 V, and maximum plate dissipation 4.75 W. The archive does not yet hold a photographed example of this type.
BrandSiemens
ClassTriode-Pentode
BaseNoval (B9A)
Filament6.3 V @ 330 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesIndirectly heated, AC or DC, parallel supply
Absolute Maximum Ratings
Plate Voltage275 V
Plate Dissipation4.75 W
Grid 2 Voltage225 V
Grid 1 Voltage-100 V
Cathode Current18 mA
H-C Voltage100 V
Audio Performance
Power Output0.05 W
Key Features
- Long life
- High reliability
- Tight tolerances
- High shock and vibration resistance
- Heater switching stability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode | 100 V | 5500 | 3250 | 18 | 14 mA |
| Pentode HF Amplifier | 170 V | 6200 | 400000 | 40 | 10 mA |
| Pentode Mixer | 170 V | 2400 | 500000 | — | 8.9 mA |
Application Notes
Triode suitable for oscillators up to 300 MHz, multivibrators, and blocking oscillators. Pentode suitable for mixer stages, HF, and AF amplifiers.
Datasheets
Datasheet: E80CF.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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