Tube-number record
5R4-G
0 archive entries
5R4-G is a tube type in the TubeDatabase archive (class: Full-Wave High-Vacuum Rectifier). Recorded specifications: brand Sheldon, year 1952, construction Rectifier, base Medium Shell Octal, socket Octal, and maximum plate voltage 2800 V. The archive does not yet hold a photographed example of this type.
BrandSheldon
ClassFull-Wave High-Vacuum Rectifier
BaseOctal
Construction
Primary TypeRectifier
Rectifier TypeHigh-Vacuum
EnvelopeST16
Base MaterialMedium Shell Octal
Sections2
Filament / Heater
MaterialCoated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condenser Input Filter (700V RMS) | 700 V | — | 125 | — | 250 mA |
| Condenser Input Filter (900V RMS) | 900 V | — | 575 | — | 150 mA |
| Choke Input Filter (750V RMS) | 750 V | — | — | — |
Application Notes
Horizontal operation is permissible if pins 1 and 4 are in a vertical plane. For capacitor inputs larger than 4 mfd, additional plate-supply impedance may be required. Filament should reach operating temperature (approx 10s) before plate voltage is applied.
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