Tube-number record
3A/147J
0 archive entries
3A/147J is a tube type in the TubeDatabase archive (class: Grounded Grid Oscillator Triode). Recorded specifications: construction Triode, base Disc Seal, socket Coaxial, maximum plate voltage 350 V, and maximum plate dissipation 6 W. The archive does not yet hold a photographed example of this type.
ClassGrounded Grid Oscillator Triode
BaseCoaxial
Filament4 V @ 700 mA
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialDisc Seal
SectionsSingle
Filament / Heater
Heater NotesCathode is strapped inside the bulb to one heater lead
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Oscillator at 250V | 250 V | 6000 | — | 35 | — |
Application Notes
The internal diameter of the outer conductor of any coaxial line system employed with this valve should not be less than 1.38 inches to avoid grid disc seal damage. Outputs between 1 and 2 watts are obtainable up to 750 Mc/s.
0 results