Tube-number record
OE3/85A1
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BrandAmperex
ClassVoltage Reference Tube
BaseLoctal
Construction
Primary TypeOther / special
EnvelopeTubular
Base MaterialLock-in
SectionsSingle
Filament / Heater
MaterialMolybdenum
Warm-up Time180s
Absolute Maximum Ratings
Cathode Current8 mA
Audio Performance
Key Features
- Constant voltage stability
- Molybdenum cathode
- Lock-in base
- Low tolerance between tubes
- Independent of ambient temperature
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Voltage Reference | 85 V | — | 450 | — | 4 mA |
Application Notes
A warmup period of 3 minutes is recommended to insure minimum voltage drift. A series resistor must always be used to limit current. Minimum DC supply voltage of 120V required for ignition.
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