TubeDatabase
  • Tubes
  • Testers
  • Companies
  • Submit
  • About

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)
DisclaimerSubmit a tube

Tube-number record

42 M.P./PEN.

0 archive entries

BrandCossor
ClassOutput Pentode
Filament4 V @ 2 mA

Construction

Primary Type
Pentode
SectionsSingle

Filament / Heater

Heater NotesIndirectly Heated

Absolute Maximum Ratings

Plate Voltage250 V
Grid 2 Voltage250 V

Audio Performance

Key Features
  • Indirectly heated
  • High slope
  • Pentode output valve
  • Capable of very large undistorted volume

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A250 V7000——32 mA
Class A200 V———28 mA

Application Notes

Characterised by an exceptionally high slope, which enables it to deliver full output for a very small input. May be fed directly from a double diode detector such as the Cossor D.D.4.

Filters

0 tubes found

Manufacturers

Brands

    0 results