Tube-number record
509
0 archive entries
509 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand Mazda, construction Pentode, maximum plate voltage 250 V, and maximum plate dissipation 11 W. The archive does not yet hold a photographed example of this type.
BrandMazda
ClassPower Pentode
Filament6.3 V @ 1.2 mA
Construction
Primary TypePentode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation11 W
Grid 2 Voltage250 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 250 V | 9000 | 25000 | — | 45 mA |
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