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)
DisclaimerA–Z indexSubmit a tube
EL821 vacuum tube outline illustration

Tube-number record

EL821

0 archive entries

EL821 is a tube type in the TubeDatabase archive (class: Video Output Pentode). Recorded specifications: construction Pentode, socket Noval (B9A), maximum plate voltage 275 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.

ClassVideo Output Pentode
BaseNoval (B9A)
Filament6.3 V @ 750 mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Plate Voltage275 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Condition 1250 V13000600002640 mA
Condition 2250 V11000500002640 mA

Application Notes

Particularly suitable for use in high definition television equipment as a video output stage.

Datasheets

Datasheet: EL821.pdf

Download PDF
Loading datasheet...

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

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Plate Dissipation
    12 W
    Grid 2 Voltage275 V
    Cathode Current60 mA
    H-C Voltage90 V

    Audio Performance

    Key Features
    • High mutual conductance
    • Video output pentode
    • Suitable for high definition television equipment