575A
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BrandEIMAC
ClassHalf-wave mercury vapor rectifier
BaseE.F. Johnson #123-211
Construction
Primary Typehalf-wave
Rectifier Typemercury vapor
EnvelopeGlass
Base Material50 watt, A4-29
Sections1
Filament / Heater
MaterialOxide-coated
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage15000 V
Cathode Current2500 mA
Audio Performance
Key Features
- Withstands high peak inverse voltages
- Conducts at relatively low applied voltages
- Oxide-coated filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Quadrature Filament Excitation (20-50°C Mercury Temp) | 15000V | - | - | - | 2500mA |
| In-Phase Filament Excitation (20-50°C Mercury Temp) | 15000V | - | - | - | 1500mA |
Application Notes
The tube must be mounted vertically base down. Provisions should be made for adequate air circulation. Condensed mercury temperature should be maintained at 40°±5°C for most satisfactory operation. Filament should reach operating temperature (30s) before plate voltage is applied.
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