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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)
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6550-A vacuum tube outline illustration

Tube-number record

6550-A

0 archive entries

6550-A is a tube type in the TubeDatabase archive (class: Beam Power Pentode). Recorded specifications: brand General Electric, construction Beam tetrode / beam power, base Micanol, socket Octal, maximum plate voltage 660 V, and maximum plate dissipation 42 W. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric
ClassBeam Power Pentode
BaseOctal
Filament6.3 V @ 1.6 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeT-14
Base MaterialMicanol
Sections1

Filament / Heater

Heater NotesHeater voltage +/- 0.6V

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode Connection250 V11000150008140 mA

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    Plate Voltage660 V
    Plate Dissipation42 W
    Grid 2 Voltage440 V
    Cathode Current190 mA
    H-C Voltage300 V

    Audio Performance

    Typical THD0.7%
    Power Output100 W
    Key Features
    • Up to 100 Watts Output - 2 Tubes in Push-Pull
    • Straight sided T-14 envelope
    • Low loss Micanol base