FTS81

Vapor-cooled Brown Boveri high-power triode for industrial and communications RF or AF service. Its very high dissipation and multi-kilowatt output ratings support major continuous-duty transmitter and industrial installations.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 8 V / 80 A

Description

Vapour-cooled power triode for industry and communication, RF and AF service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 8 V
Nominal heater current: 80 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Max plate voltage: 10000 V
Max plate dissipation: 20000 W
Max cathode current: 3.5 A

Published ratings and characteristics promoted where reliably recoverable from the approved sheet.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1969 Brown Boveri

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Maximum Frequency
60 MHz
RF/Output Power
26000 W
Quick Reference, stated operating class where applicable
Maximum Anode Current
3.5 A