Tube-number record
ED 500
0 archive entries
ED 500 is a tube type in the TubeDatabase archive (class: High Voltage Shunt Regulator Triode). Recorded specifications: brand Mazda Belvu, year 1968, construction Triode, socket Magnoval, maximum plate voltage 25000 V, and maximum plate dissipation 30 W. The archive does not yet hold a photographed example of this type.
BrandMazda Belvu
ClassHigh Voltage Shunt Regulator Triode
BaseMagnoval
Filament6.3 V @ 400 mA
Construction
Primary TypeTriode
EnvelopeT12
Sections1
Filament / Heater
Heater NotesIndirect heating, parallel feed
Absolute Maximum Ratings
Plate Voltage25000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Shunt Regulator | 25000 V | — | — | — | 1.5 mA |
| Shunt Regulator (Low current) | 25000 V | — | — | — | 0.1 mA |
Application Notes
The ED500 is designed for high anode voltages; X-ray shielding must be used. Pin 2 (Shield) must be connected to Pin 1 (Cathode).
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