Tube-number record
EL90
0 archive entries
EL90 is a tube type in the TubeDatabase archive (class: NF-Endverstärkung Pentode). Recorded specifications: year 1953, construction Pentode, base Glass, socket Miniature 7-pin (B7G), maximum plate voltage 300 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.
ClassNF-Endverstärkung Pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 0.45 mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesParallel feeding; Indirectly heated cathode
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250 V | 4100 | 52000 | — | 45 mA |
| Triode | 250 V | 4500 | — | — | 49.5 mA |
Application Notes
Die Steuergitteranschlüsse 1 - 1 an der Fassung müssen beide mit der Steuergitterleitung verbunden werden. Der Heizerstift 2 soll vorzugsweise geerdet werden.
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