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U107

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BrandMarconi
ClassHalf-wave rectifier
BaseB7G
Filament4V @ 100mA

Construction

Primary TypeMiniature
Rectifier TypeHalf-wave
EnvelopeTubular
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage250 V
Cathode Current90 mA
H-C Voltage350 V

Audio Performance

Key Features
  • Miniature
  • Indirectly heated
  • Any mounting position

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Single phase half wave, Capacitor input250V---90mA

Application Notes

Free air circulation is preferable. If a retaining device in the form of a metal canister is used, the surfaces should be blackened. The temperature of the hottest part of the bulb must not exceed 250°C.

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