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
286A vacuum tube outline illustration

Tube-number record

286A

0 archive entries

286A is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Western Electric, construction Pentode, base Medium six-pin, socket Special / none, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.

BrandWestern Electric
ClassPentode
BaseSpecial / none
Filament2 V @ 1600 mA

Construction

Primary TypePentode
EnvelopeGlass with top cap
Base MaterialMedium six-pin
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated cathode; designed to operate on a voltage basis

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Voltage Amplifier135 V11904000004756.1 mA
Voltage Amplifier180 V12007000008506.2 mA
Maximum Operating Conditions250 V1210105000012756.3 mA

Application Notes

To avoid undesired feed-back, use close-fitting shields, filter battery leads, and avoid common impedances. For amplifier applications, connect suppressor grid directly to cathode.

Datasheets

Datasheet: 286A.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 Voltage250 V
    Grid 1 Voltage-45 V
    H-C Voltage30 V

    Audio Performance

    Key Features
    • Variable-mu characteristic
    • Suppressor-grid pentode
    • Shielded modulator capability
    • High frequency capability
    • Separate terminal for each of the three grids
    Nominal cut-off250 V5———