3B27
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BrandElectronic Enterprises, Inc.
ClassHigh Vacuum Rectifier
BaseMedium 4-pin Bayonet
Filament2.5V @ 5mA
Construction
Primary TypeHalf-wave Rectifier
Rectifier TypeHigh Vacuum
EnvelopeST-19
Base MaterialPhenolic
SectionsSingle
Filament / Heater
MaterialOxide-coated
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage8500 V
Cathode Current250 mA
Audio Performance
Key Features
- Indirectly-heated
- Oxide-coated Cathode
- Bayonet base
- High vacuum
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Voltage Drop Point 1 | 55V | - | - | - | 250mA |
| Voltage Drop Point 2 | 45V | - | - | - | 200mA |
| Voltage Drop Point 3 | 35V | - | - | - | 150mA |
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