Tube-number record
A 109
0 archive entries
A 109 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Philips, construction Triode, socket 4-pin, and maximum plate voltage 120 V. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassTriode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage120 V
Cathode Current10 mA
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| General | 80 V | 400 | 22500 | 9 | 4 mA |
Application Notes
Geschikt voor detectie, hoog- en laagfrequentie-versterking. Een regelbare gloeistroomweerstand van minstens 12 ohm moet worden voorgeschakeld.
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