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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

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Voltage Drop Point 155V---250mA
Voltage Drop Point 245V---200mA
Voltage Drop Point 335V---150mA

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