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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

AC/SP3/RH

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BrandEdiswan
ClassLow Noise H.F. Pentode
Base7-pin (non-miniature)
Filament4 V @ 1000 mA

Construction

Primary TypePentode
EnvelopeMetallised
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated; parallel operation

Absolute Maximum Ratings

Plate Voltage250 V
Grid 2 Voltage250 V

Audio Performance

Key Features
  • Low noise
  • High slope
  • Low microphony
  • Metallised bulb

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. Amplifier250 V7000550000—7.8 mA
H.F. Amplifier250 V7000550000—7.9 mA
H.F. Amplifier250 V7450400000—10.5 mA

Filters

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Manufacturers

Brands

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    H.F. Amplifier250 V7600340000—12.3 mA
    Resistance Capacity Coupled Amplifier250 V————