Tube-number record
2-240A
0 archive entries
2-240A is a tube type in the TubeDatabase archive (class: High Vacuum Diode Rectifier). Recorded specifications: brand Eimac, year 1959, construction Diode, socket 4-pin, maximum plate voltage 25000 V, and maximum plate dissipation 150 W. The archive does not yet hold a photographed example of this type.
BrandEimac
ClassHigh Vacuum Diode Rectifier
Base4-pin
Construction
Primary TypeDiode
Rectifier Typevacuum
Envelopeglass
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single-phase, Half-Wave (Capacitor-Input) | 10000 V | — | — | — | 320 mA |
| Single-phase, Full-Wave (Capacitor-Input) | 10000 V | — | — | — | 640 mA |
| Single-phase, Full-Wave (Choke-Input) | 8000 V | — | — | — |
Application Notes
The 2-240A must be mounted vertically with the base either down or up. Clearance should be provided around the glass envelope for free circulation of air. An Eimac HR-6 heat dissipating connector is recommended for the plate terminal.
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