Tube-number record
2 XM 400
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BrandMazda
ClassMercury Vapor Rectifier
BaseSpecial / none
Construction
Primary TypeOther / special
Rectifier TypeMercury Vapor
EnvelopeVi
Sections1
Filament / Heater
MaterialOxide-coated
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage4000 V
Cathode Current400 mA
Audio Performance
Key Features
- Mercury vapor
- Oxide-coated cathode
- Direct heating
- Top cap anode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Internal Voltage Drop | 15 V | — | — | — | — |
Application Notes
The filament must be brought to operating temperature (approx 30 seconds) before anode voltage is applied. Shielding and H.F. filters should be used to protect from electromagnetic fields. Mounting must be vertical, base down.
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