Tube-number record
EF 860
0 archive entries
EF 860 is a tube type in the TubeDatabase archive (class: High-frequency pentode). Recorded specifications: brand VEB Werk für Fernmeldewesen (WF), year 1956, construction Pentode, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2.1 W. The archive does not yet hold a photographed example of this type.
BrandVEB Werk für Fernmeldewesen (WF)
ClassHigh-frequency pentode
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2.1 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Operation | 210 V | 10000 | 550000 | 50 | 10 mA |
| Pre-amplifier Mode | 170 V | 7500 | 500000 | — | 10 mA |
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