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Tube Database (7,341 tube types · 1,270 archive entries)

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EF86 vacuum tube outline illustration

Tube-number record

EF86

9 archive entries

EF86 is a tube type in the TubeDatabase archive (class: A.F. Amplifier Pentode). Recorded specifications: brand Philips, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive holds 9 photographed examples of this type.

Equivalent and related tube numbers

Commonly cross-referenced designations for EF86. Compatibility is not guaranteed. Before substituting, verify socket and pinout, heater voltage and current, bias requirements, and maximum ratings against the relevant manufacturers’ datasheets.

  • 6267
  • Z729
BrandPhilips
ClassA.F. Amplifier Pentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA

Construction

Primary TypePentode
EnvelopeGlass
Base Material

Datasheets

Datasheet: EF86.pdf

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

Filters

9 tubes found

Manufacturers

La Radiotechinque1Philips1
Glass
SectionsSingle

Filament / Heater

Heater NotesIndirect by A.C. or D.C.; series or parallel supply

Absolute Maximum Ratings

Plate Voltage300 V
Plate Dissipation1 W
Grid 2 Voltage200 V
Cathode Current6 mA
H-C Voltage100 V

Audio Performance

Typical THD5%
Key Features
  • Low microphony
  • Low hum
  • Low noise
  • Internal shielding

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode250 V20002500000383 mA
Triode connected (g2 to a, g3 to k)250 V——23.52.53 mA

Application Notes

Specifically designed for high-gain audio pre-amplifier stages. When used as a phase inverter immediately preceding the output stage, Rkf max may be 120 kOhms.
RFT
1

Brands

Marconi2Mullard2Telefunken2Amperex1RFT1Rogers1

Related tube numbers

626738Y519R11Z7291
  • Marconi EF86, 6267 tube - La Radiotechinque — photo 1 of 4
    Marconi EF86, 6267 tube - La Radiotechinque — photo 2 of 4
    Marconi EF86, 6267 tube - La Radiotechinque — photo 3 of 4
    Marconi EF86, 6267 tube - La Radiotechinque — photo 4 of 4

    Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

    Photo 1 of 4

    EF86, 6267

    Maker
    La Radiotechinque
    Brand
    Marconi
  • Rogers EF86, 6267 tube - Philips — photo 1 of 3
    Rogers EF86, 6267 tube - Philips — photo 2 of 3
    Rogers EF86, 6267 tube - Philips — photo 3 of 3

    Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

    Photo 1 of 3

    EF86, 6267

    Maker
    Philips
    Brand
    Rogers
  • Telefunken EF86 tube - RFT — photo 1 of 8
    Telefunken EF86 tube - RFT — photo 2 of 8
    Telefunken EF86 tube - RFT — photo 3 of 8
    Telefunken EF86 tube - RFT — photo 4 of 8
    Telefunken EF86 tube - RFT — photo 5 of 8
    Telefunken EF86 tube - RFT — photo 6 of 8
    Telefunken EF86 tube - RFT — photo 7 of 8
    Telefunken EF86 tube - RFT — photo 8 of 8

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    Photo 1 of 8

  • Mullard EF86, 9R1 tube — photo 1 of 3
    Mullard EF86, 9R1 tube — photo 2 of 3
    Mullard EF86, 9R1 tube — photo 3 of 3

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    Photo 1 of 3

    EF86, 9R1

    Brand
    Mullard
  • Amperex 6267, EF86, 8Y5 tube — photo 1 of 2
    Amperex 6267, EF86, 8Y5 tube — photo 2 of 2

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    Photo 1 of 2

    6267, EF86, 8Y5

    Brand
    Amperex
  • Telefunken EF86 tube — photo 1 of 4
    Telefunken EF86 tube — photo 2 of 4
    Telefunken EF86 tube — photo 3 of 4
    Telefunken EF86 tube — photo 4 of 4

    Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

    Photo 1 of 4

    EF86

    Brand
    Telefunken
  • RFT EF86 tube — photo 1 of 3
    RFT EF86 tube — photo 2 of 3
    RFT EF86 tube — photo 3 of 3

    Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

    Photo 1 of 3

    EF86

    Brand
    RFT
  • Mullard EF86 tube — photo 1 of 4
    Mullard EF86 tube — photo 2 of 4
    Mullard EF86 tube — photo 3 of 4
    Mullard EF86 tube — photo 4 of 4

    Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

    Photo 1 of 4

    EF86

    Brand
    Mullard
  • Marconi Z729, EF86 tube — photo 1 of 8
    Marconi Z729, EF86 tube — photo 2 of 8
    Marconi Z729, EF86 tube — photo 3 of 8
    Marconi Z729, EF86 tube — photo 4 of 8
    Marconi Z729, EF86 tube — photo 5 of 8
    Marconi Z729, EF86 tube — photo 6 of 8
    Marconi Z729, EF86 tube — photo 7 of 8
    Marconi Z729, EF86 tube — photo 8 of 8

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    Photo 1 of 8

Showing 1–9 of 9 results

EF86

Maker
RFT
Brand
Telefunken

Z729, EF86

Brand
Marconi