Tube-number record
4205-E
0 archive entries
4205-E is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Standard Valves, construction Triode, socket 4-pin, maximum plate voltage 400 V, and maximum plate dissipation 15 W. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassTriode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated
Absolute Maximum Ratings
Plate Voltage400 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Audio | 250 V | 1655 | 4350 | 7.2 | 19 mA |
| Class A Audio (Maximum Operating) | 400 V | 1894 | 3800 | 7.2 | 30 mA |
| Class C Telegraphy | 400 V | — | — | — | 45 mA |
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