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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

6550-A

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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

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

Typical Operation

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

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