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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube-number record

HY51A

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BrandHytron
ClassPower Triode
Base4-pin

Construction

Primary TypeTriode
EnvelopeST-19
Base MaterialIso.
SectionsSingle

Filament / Heater

MaterialThoriated Tungsten

Absolute Maximum Ratings

Plate Voltage1000 V
Plate Dissipation65 W
Grid 1 Voltage-200 V
Cathode Current155 mA

Audio Performance

Power Output180 W
Key Features
  • High Efficiency
  • Rugged construction
  • High transconductance
  • Low driving power

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class B Modulator (per tube)1000 V6500—25150 mA
Class C Telegraphy1000 V6500——140 mA
Class C Telephony (Plate Modulated)800 V———

Application Notes

Internal structure permits operation at maximum rating at frequencies up to 60 megacycles.

Datasheets

Datasheet: HY51A.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    100 mA