Tube-number record
3A/146J
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3A/146J is a tube type in the TubeDatabase archive (class: UHF Grounded Grid Triode). Recorded specifications: construction Triode, socket Planar / disc seal, maximum plate voltage 350 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.
ClassUHF Grounded Grid Triode
BasePlanar / disc seal
Filament4 V @ 650 mA
Construction
Primary TypeTriode
EnvelopeGlass with metal grid disc
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated; cathode strapped to one heater lead
Absolute Maximum Ratings
Plate Voltage350 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Amplifier | 250 V | 5000 | — | 100 | — |
Application Notes
Designed primarily for use as an amplifier at frequencies between 50 and 450 Mc/s. Coaxial line resonators necessary above 350 Mc/s.
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