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W30

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BrandM.O. Valve Company Ltd
ClassPentode
Base7-pin
Filament13V @ 0.3mA

Construction

Primary TypeIndirectly Heated H.F. Pentode
EnvelopeCatkin (all-metal)
SectionsSingle

Filament / Heater

Heater NotesIntended for series or parallel running

Absolute Maximum Ratings

Plate Voltage250 V
Grid 2 Voltage250 V

Audio Performance

Key Features
  • Variable-mu characteristic
  • All-metal construction
  • Catkin design
  • Mica to metal clamp
  • Low microphonic noise

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. Amplifier250V4000--12mA
H.F. Amplifier (Volume Controlled)250V30--0.5mA

Application Notes

High Frequency Pentode for series or parallel running in A.C./D.C. receivers or 12-volt car radio systems. Variable-mu characteristic allows for volume control via grid bias variation.

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