Tube-number record
1FD9
0 archive entries
1FD9 is a tube type in the TubeDatabase archive (class: Diode-RF Pentode). Recorded specifications: brand MAZDA, year 1948, construction Multi-section, base Glass, socket Miniature 7-pin (B7G), and maximum plate voltage 90 V. The archive does not yet hold a photographed example of this type.
BrandMAZDA
ClassDiode-RF Pentode
BaseMiniature 7-pin (B7G)
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage90 V
Cathode Current3 mA
Audio Performance
Key Features
- Directly heated
- Battery operation
- Tentative Rating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 67.5 V | 625 | 600000 | — | 1.6 mA |
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