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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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4094-A vacuum tube outline illustration

Tube-number record

4094-A

0 archive entries

4094-A is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Standard Valves, construction Triode, socket 4-pin, maximum plate voltage 1250 V, and maximum plate dissipation 85 W. The archive does not yet hold a photographed example of this type.

BrandStandard Valves
ClassTriode
Base4-pin

Construction

Primary TypeTriode
EnvelopeHard glass bulb
Sections1

Filament / Heater

MaterialThoriated tungsten

Absolute Maximum Ratings

Plate Voltage1250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Constants1000 V400093003730 mA
Class B A.F. Amp (Max Signal)1250 V———150 mA
Class C Telegraphy1250 V———150 mA

Application Notes

This valve should be mounted so that the plane of the filament is vertical.

Filters

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Manufacturers

Brands

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    Plate Dissipation85 W
    Cathode Current150 mA

    Audio Performance

    Power Output200 W
    Key Features
    • Thoriated tungsten filament
    • Molybdenum anode
    • Hard glass bulb
    • Constant voltage filament type