Tube-number record
DF91
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DF91 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Mullard, construction Pentode, socket Miniature 7-pin (B7G), and maximum plate voltage 90 V. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassPentode
BaseMiniature 7-pin (B7G)
Construction
Primary TypePentode
EnvelopeMiniature
SectionsSingle
Filament / Heater
MaterialDirectly heated
Absolute Maximum Ratings
Plate Voltage90 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. or I.F. amplifier 1 | 45 V | 700 | 350000 | — | 1.7 mA |
| R.F. or I.F. amplifier 2 | 67.5 V | 875 | 250000 | — | 3.4 mA |
| R.F. or I.F. amplifier 3 | 90 V | 750 | 800000 | — | 1.8 mA |
Datasheets
Datasheet: DF91.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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