Tube-number record
EBF89
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EBF89 is a tube type in the TubeDatabase archive (class: Double Diode - Remote-cutoff Pentode). Recorded specifications: construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 2.25 W. The archive does not yet hold a photographed example of this type.
ClassDouble Diode - Remote-cutoff Pentode
BaseNoval (B9A)
Filament6.3 V @ 0.3 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections3
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.25 W
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current16.5 mA
H-C Voltage100 V
Audio Performance
Key Features
- Remote-cutoff characteristic
- Combined AM/FM detector and IF amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 250 V | 4500 | 900000 | 20 | 9 mA |
Application Notes
Commonly used in radio receivers for IF amplification and detection.
Datasheets
Datasheet: EBF89.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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