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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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TBW 6/20 vacuum tube outline illustration

Tube-number record

TBW 6/20

0 archive entries

TBW 6/20 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Philips, construction Triode, base Coaxial terminals, socket Coaxial, maximum plate voltage 5500 V, and maximum plate dissipation 12000 W. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassTransmitting Triode
BaseCoaxial

Construction

Primary TypeTriode
EnvelopeMetal-ceramic/Glass
Base MaterialCoaxial terminals
SectionsSingle

Filament / Heater

MaterialThoriated tungsten

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
H.F. class C telegraphy, grounded grid5000 V60000—604800 mA
H.F. class B telephony for television (CCIR/FCC)4000 V———4380 mA

Application Notes

The filament current must never exceed a peak value of 500 A during the initial energizing schedule. Cooling requires water circulation and additional air flow for seals, especially at higher frequencies like 220 MHz.

Filters

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Manufacturers

Brands

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    Plate Voltage5500 V
    Plate Dissipation12000 W
    Grid 1 Voltage-500 V
    Cathode Current6000 mA

    Audio Performance

    Key Features
    • Coaxial construction
    • Thoriated tungsten filament
    • Water cooled anode
    • Designed for AM, FM and TV transmitters