Tube-number record
3A/146J
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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
Plate Dissipation2 W
Audio Performance
Key Features
- UHF Operation
- Grounded Grid design
- Frequency range 50 to 450 Mc/s
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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