Tube-number record
309
0 archive entries
309 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: construction Triode and maximum plate voltage 190 V. The archive does not yet hold a photographed example of this type.
ClassTriode
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage190 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 | 190 V | 4000 | 3250 | 13 | 9 mA |
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