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Power - Triode ·Triode

HT311

High-frequency triode for RF amplification and related high-frequency electronic service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 800 mA

Description

A triode intended for amplification, oscillation, measurement, or microwave-frequency service, with source-published heater and electrical characteristics.

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
12.6 V
Nominal heater current
800 mA
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
Transconductance
0.01 S
Max plate voltage
1000 V
Max plate dissipation
80 W
Max grid dissipation
2 W
Max cathode current
125 mA

Published ratings and characteristics promoted where clearly stated. RFT HT311 is an indirectly heated, forced-air-cooled metal-ceramic microwave triode designed for amplification, frequency multiplication and oscillation to approximately 3.75 GHz. Maximum operating anode voltage is 1,000 V, plate dissipation 80 W, grid dissipation 2 W, and cathode current 125 mA. The 2,000 V cold-anode rating is not a continuous operating limit. Heater voltage is nominally 12.6 V at 0.8 A, with reduced voltage recommended above 400 MHz; 12.1 V is specified for 400–1,000 MHz continuous-wave operation. A minimum cooling airflow of 60 L/min is specified at maximum dissipation under the stated inlet-temperature conditions.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Frequenzen von etwa

    3.75 GHz

    Frequenzen von etwa 3,75 GHz

  • Bei Frequenzen oberhalb

    400 MHz

    Bei Frequenzen oberhalb 400 MHz

Other

  • I0

    800 mA

    I0 0,8 A V j | N

  • PublishedValue

    1000 MHz

    . . 1000 MHz 12,1 V

  • U,

    400 V

    U, 400 V

  • s

    10 mA

    s 10 mA/V

  • f 3,3

    3.3 GHz

    f 3,3 3,3 GHz Ua mMaX, 1000 V

  • Ua 500

    800 V

    Ua 500 800 V Ua mod maxX. ; <00 V

  • 1 100

    100 mA

    1 100 100 mA (100% moduliert)

  • —Ug 6

    15 V

    —Ug 6 15 V

  • 'Ug max

    150 V

    'Ug max. 150 V

  • I

    8 mA

    I8 mA

  • +Ugs maX,

    30 V

    +Ugs maX, 30 V

  • _Ugs maxX

    400 V

    _Ugs maxX. 400 V

  • Pou'l

    2 W

    Pou'l: 2 W

  • Pa maxX

    80 W

    Pa maxX. 80 W

  • Ik maxX

    125 mA

    Ik maxX. 125 mA

  • Cgk

    10 pF

    Cgk 10 pF 50 mA