Tube-number record
3A4
0 archive entries
3A4 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand MAZDA BELVU, year 1968, construction Pentode, base Glass, socket Miniature 7-pin (B7G), maximum plate voltage 165 V, and maximum plate dissipation 2.2 W. The archive does not yet hold a photographed example of this type.
BrandMAZDA BELVU
ClassPower Pentode
BaseMiniature 7-pin (B7G)
Construction
Primary TypePentode
EnvelopeA 19-2
Base MaterialGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage165 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A - Parallel Filament (1.4V) | 135 V | 1900 | 100000 | — | 14.8 mA |
| Class A - Parallel Filament (1.4V) | 150 V | 1900 | 100000 | — | 13.3 mA |
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