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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube-number record

3A/109A

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ClassRepeater Triode
Base4-pin

Construction

Primary TypeTriode
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialOxide-coated

Absolute Maximum Ratings

Plate Voltage190 V

Audio Performance

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical130 V500120006—

Application Notes

3A/109A is for replacement purposes only

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