Tube-number record
SR 53 (OG 3)
0 archive entries
SR 53 (OG 3) is a tube type in the TubeDatabase archive (class: Voltage Reference Tube). Recorded specifications: construction Other / special, base Glass, socket Miniature 7-pin (B7G), and maximum plate voltage 115 V. The archive does not yet hold a photographed example of this type.
ClassVoltage Reference Tube
BaseMiniature 7-pin (B7G)
Construction
Primary TypeOther / special
EnvelopeGlass
Base MaterialGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage115 V
Cathode Current10 mA
Audio Performance
Key Features
- Molybdenum cathode
- Extremely long life
- High stability
- Freedom of flickering
- Breakdown voltage not influenced by light
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Stabilizing | 85 V | — | — | — | 5.5 mA |
Application Notes
The breakdown voltage remains unchanged even in total darkness. Complete information on stabilizing circuits in information 5.07. Mounting in any position.
0 results