Tube-number record
6F21
0 archive entries
6F21 is a tube type in the TubeDatabase archive (class: Variable Mu H.F. Pentode). Recorded specifications: brand Ediswan, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 300 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.
BrandEdiswan
ClassVariable Mu H.F. Pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeClear
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated for parallel operation
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 | 250 V | 2500 | 1200000 | — | 4.9 mA |
| Condition 2 | 250 V | 2500 | 1200000 | — | 7.8 mA |
Datasheets
Datasheet: 6F21.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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