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

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Tube-number record

HIGH SLOPE R.F. PENTODE

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BrandMullard
ClassPentode
Base7-pin (non-miniature)
Filament4 V @ 1.3 mA

Construction

Primary TypePentode
EnvelopeMetallised
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage250 V
Grid 2 Voltage250 V
Grid 1 Voltage-1 V
Cathode Current20 mA

Audio Performance

Typical THD3.9%
Key Features
  • High slope
  • Indirectly heated
  • Metallised bulb finish

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. or L.F. Amplifier200 V4730—67308 mA
Output Valve for CRT250 V—750000—10.5 mA

Application Notes

Specially designed for application in television receivers, suitable for general use including that of an output valve for modulating a cathode ray tube.

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