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14A7/12B7

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BrandTung-Sol
ClassPentode Voltage Amplifier
BaseLock-in
Filament12.6V @ 150mA

Construction

Primary TypePentode
EnvelopeGlass Bulb
Base MaterialLock-in
SectionsSingle

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Plate Voltage300 V
Plate Dissipation4 W
Grid 2 Voltage125 V
H-C Voltage90 V

Audio Performance

Key Features
  • Coated Unipotential Cathode
  • Lock-in Construction
  • Any Mounting Position

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier100V2350120000-13mA
Class A1 Amplifier250V2000800000-9.2mA

Application Notes

Designed for RF or IF service in AC/DC receivers.

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