Tube-number record
4E27A/5-125B
0 archive entries
4E27A/5-125B is a tube type in the TubeDatabase archive (class: Radial-Beam Power Pentode). Recorded specifications: brand Eimac, year 1952, construction Pentode, base Metal, socket 7-pin (non-miniature), maximum plate voltage 4000 V, and maximum plate dissipation 125 W. The archive does not yet hold a photographed example of this type.
BrandEimac
ClassRadial-Beam Power Pentode
Base7-pin (non-miniature)
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class-C Telegraphy | 3000 V | 2150 | — | 5 | 167 mA |
| Class AB1 Modulator (Two Tubes) | 2500 V | — | 20000 | — | 220 mA |
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