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

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Tube-number record

ML-7209

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BrandMachlett
ClassUHF Planar Triode
BaseCoaxial
Filament6 V @ 1 mA

Construction

Primary TypeTriode
EnvelopeMetal-Ceramic
Sections1

Filament / Heater

Warm-up Time60s

Absolute Maximum Ratings

Plate Voltage15000 V
Plate Dissipation25 W
Grid 1 Voltage-150 V
Cathode Current3000 mA

Audio Performance

Power Output2200 W
Key Features
  • Low interelectrode capacitances
  • High transconductance
  • Rugged coaxial construction
  • Forced-air cooled

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
General Test600 V25000—10070 mA
Plate-Pulsed RF Oscillator (2.5 Gc)3500 V———4000 mA
Frequency Doubler (1.2 Gc)3500 V———1200 mA

Application Notes

Designed for use as a grid- or plate-pulsed oscillator, switch tube, or frequency multiplier at frequencies up to 3 Gc.

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