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

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7551 vacuum tube outline illustration

Tube-number record

7551

0 archive entries

7551 is a tube type in the TubeDatabase archive (class: Receiving Tube). Recorded specifications: brand SYLVANIA, construction Beam tetrode / beam power, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 10 W. The archive does not yet hold a photographed example of this type.

BrandSYLVANIA
ClassReceiving Tube
BaseNoval (B9A)
Filament12 V @ 360 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeT6 1/2
SectionsSingle

Filament / Heater

Heater NotesCurrent measured at 13.5 Volts

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Characteristics250 V5300—8.740 mA
Class C Telegraphy CCS300 V———70 mA
Class AB1 AF Amplifier (Push-Pull)300 V———125 mA

Application Notes

Designed for use as a Class C RF amplifier, oscillator, or frequency multiplier up to 175 Mc. Can also be used as a modulator or AF amplifier.

Datasheets

Datasheet: 7551.pdf

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

Filters

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Manufacturers

Brands

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    Plate Dissipation10 W
    Grid 2 Voltage250 V
    Grid 1 Voltage-125 V
    H-C Voltage100 V

    Audio Performance

    Typical THD5%
    Power Output20.5 W
    Key Features
    • Mobile equipment design
    • Up to 175 Mc frequency range