Tube-number record
NF 3
0 archive entries
NF 3 is a tube type in the TubeDatabase archive (class: Regelpentode). Recorded specifications: brand Telefunken, construction Pentode, base Metal/Side-contact, socket Side-contact (P-base), maximum plate voltage 200 V, and maximum plate dissipation 1.5 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassRegelpentode
BaseSide-contact (P-base)
Filament12.6 V @ 195 mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialMetal/Side-contact
SectionsSingle
Filament / Heater
Heater NotesSerienschaltung zum Betrieb aus 25-Volt Starterbatterien zugelassen
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Characteristics | 200 V | 2300 | 700000 | — | 4.5 mA |
Application Notes
Designed for radio frequency stages and operation from 25V battery systems.
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