Tube-number record
4212-E
0 archive entries
4212-E is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Standard Valves, construction Triode, base Bayonet, socket 4-pin, maximum plate voltage 3000 V, and maximum plate dissipation 275 W. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassTriode
Base4-pin
Construction
Primary TypeTriode
EnvelopeHard glass bulb
Base MaterialBayonet
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A AF Amp (1) | 1500 V | 8400 | 1900 | 16 | 170 mA |
| Class A AF Amp (2) | 1250 V | — | — | — | 200 mA |
| Class B AF Amp (2 Valves, zero signal) | 2000 V | — | — | — | 40 mA |
Application Notes
This valve should be mounted so that the plane of the filament is vertical.
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