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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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4 Q 025-3 vacuum tube outline illustration

Tube-number record

4 Q 025-3

0 archive entries

4 Q 025-3 is a tube type in the TubeDatabase archive (class: High-voltage half-wave rectifier). Recorded specifications: brand VEB WERK FÜR FERNSEHELEKTRONIK BERLIN, construction Rectifier, socket Special / none, and maximum plate voltage 10000 V. The archive does not yet hold a photographed example of this type.

BrandVEB WERK FÜR FERNSEHELEKTRONIK BERLIN
ClassHigh-voltage half-wave rectifier
BaseSpecial / none

Construction

Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialOxide-coated
Warm-up Time120s

Absolute Maximum Ratings

Datasheets

Datasheet: 4Q025-3.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Plate Voltage10000 V
    Cathode Current250 mA

    Audio Performance

    Key Features
    • Mercury-vapor filled
    • Directly heated oxide cathode