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1L4

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BrandBrimar
ClassPentode
BaseMiniature 7-Pin

Construction

Primary TypeR.F. Pentode
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialDirectly Heated

Absolute Maximum Ratings

Plate Voltage110 V
Grid 2 Voltage90 V
Cathode Current6.5 mA

Audio Performance

Key Features
  • Miniature battery
  • Low filament current
  • R.F. or I.F. amplifier

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
RF/IF Amplifier Operation 190V930600000-2.9mA
RF/IF Amplifier Operation 290V1030350000-4.5mA

Application Notes

Suitable for R.C. coupled A.F. amplifier operation. Grid return should be made to negative filament (pin 1) via a resistance of at least 0.5 meg to minimize variations due to contact potential.

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