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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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Tube-number record

25E5

0 archive entries

25E5 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Rogers, year 1956, construction Pentode, socket Duodecal, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.

BrandRogers
ClassOutput Pentode
BaseDuodecal
Filament25 V @ 300 mA

Construction

Primary TypePentode
EnvelopeT9
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Grid 2 Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
pentode100 V1400050005.6100 mA

Application Notes

If the tube operates below the knee, Barkhausen oscillations can occur. This can be avoided by inserting a series resistor in grid No. 2 lead (min. 2200 ohms).

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Grid 1 Voltage
    1000 V
    Cathode Current200 mA
    H-C Voltage250 V

    Audio Performance

    Key Features
    • Output pentode
    • Television line output tube