Tube-number record
18A5
0 archive entries
18A5 is a tube type in the TubeDatabase archive (class: Beam Pentode). Recorded specifications: brand General Electric, year 1956, construction Beam tetrode / beam power, base Intermediate Shell Octal 6-Pin, socket Octal, maximum plate voltage 350 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassBeam Pentode
BaseOctal
Filament18.5 V @ 0.3 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeT-9
Base MaterialIntermediate Shell Octal 6-Pin
Sections1
Filament / Heater
MaterialCoated Unipotential
Warm-up Time11s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 60 V | — | — | — | 165 mA |
| Pentode | 200 V | 4800 | 27000 | 4.6 | 40 mA |
Application Notes
Specifically designed for horizontal-deflection amplifier service in compact series-string television receivers with low d-c supply voltages.
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