Tube-number record
3Z/340G
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3Z/340G is a tube type in the TubeDatabase archive (class: R.F. Power Triode). Recorded specifications: brand ITT (Standard Telephones and Cables Limited), construction Triode, maximum plate voltage 14000 V, and maximum plate dissipation 125000 W. The archive does not yet hold a photographed example of this type.
BrandITT (Standard Telephones and Cables Limited)
ClassR.F. Power Triode
Construction
Primary TypeTriode
EnvelopeGlass/Metal (Vapour-cooled)
SectionsDual-section filament
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage14000 V
Plate Dissipation125000 W
Cathode Current18000 mA
Audio Performance
Key Features
- Vapour-cooled
- Thoriated tungsten filament
- Cathode drive operation
- Dual filament sections
- Safety thermal fuse fitted
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C R.F. Power Amplifier or Oscillator | 14000 V | 90000 | — | 35 | 17500 mA |
Application Notes
Designed for use as an r.f. power amplifier or oscillator. The two filament sections should be operated in phase quadrature. Anode is cooled by evaporation of water in an approved boiler.
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