Tube-number record
4079-A
0 archive entries
4079-A is a tube type in the TubeDatabase archive (class: Mercury Vapour Rectifier). Recorded specifications: brand Standard, construction Rectifier, socket Special / none, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandStandard
ClassMercury Vapour Rectifier
BaseSpecial / none
Construction
Primary TypeRectifier
Rectifier TypeMercury Vapour
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated
Warm-up Time300s
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Circuit 2 (2 Valves) | 6400 V | — | — | — | 12500 mA |
| Circuit 3 (4 Valves) | 12800 V | — | — | — | 12500 mA |
| Circuit 4 (3 Valves) | 9100 V | — | — | — | 15400 mA |
Application Notes
The rectifier is directly heated; output circuit must be connected to the mid-point of the filament transformer. Filament and anode voltages should be 90 degrees out of phase. After shipment, run filament at full voltage for 30 minutes before applying anode voltage.
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