Tube-number record
4D.1
0 archive entries
4D.1 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Brimar, construction Triode, socket 7-pin (non-miniature), and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandBrimar
ClassTriode
Base7-pin (non-miniature)
Filament13 V @ 200 mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesSuitable for A.C., universal, or automobile receivers
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Amplifier Characteristics | 100 V | 4000 | 10000 | 40 | 2.5 mA |
| Amplifier | 200 V | — | — | — | 5 mA |
| Amplifier | 150 V | — | — | — | 3 mA |
Application Notes
Eminently suitable for use as a detector of the grid leak and condenser or anode bend (grid biassed) type.
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