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ACT 9

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BrandMarconi
ClassTransmitting Triode
BaseCustom / Stud mounting

Construction

Primary TypeTransmitting Triode
EnvelopeGlass with external radiator
SectionsSingle

Filament / Heater

MaterialTungsten

Absolute Maximum Ratings

Plate Voltage10000 V
Plate Dissipation1100 W
Cathode Current400 mA

Audio Performance

Key Features
  • Air-cooled
  • Tungsten filament
  • Supports forced air cooling for higher dissipation
  • Suitable for frequencies up to 80 Mc/s

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class C Telegraphy10000V31001300040380mA
Class B Telephony10000V31001300040160mA

Application Notes

Valve must be mounted vertically with anode uppermost. Convection cooling is adequate for dissipation up to 800W with 12 inch clearance. Forced air cooling (10 cu. ft./min) allows dissipation up to 1,100W.

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