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Specialized - Traveling Wave ·TravelingWave

F2518

Voltage-tunable backward-wave oscillator with helix slow-wave structure and permanent-magnet focusing, providing at least 50 mW microwave output.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 970 mA

Description

F2518 voltage-tunable backward-wave oscillator with permanent-magnet focusing and helix slow-wave structure.

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
6.3 V
Nominal heater current
970 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

TravelingWave

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Applicable promoted fields mapped from printed headings; specialized microwave/imaging/electrode data retained densely in TUBE_SECTION_PARAMETER.

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

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

TravelingWave

Characteristic

  • Frequency Range

    6.6 to 8.7 GHz

Other

  • Power Output Range

    50 to 150 mW

  • Power Output Minimum

    50 mW

  • Power Output Variation Maximum

    6 dB

  • Fine Grain Variation Maximum

    2.5 dB

  • Anode Voltage Typical

    225 V

  • Anode Voltage Maximum

    250 V

  • Anode Current Typical

    0.5 mA

  • Anode Current Maximum

    1 mA

  • Cathode Current Typical

    8 mA

  • Cathode Current Maximum

    12 mA

  • Helix Current Typical

    3 mA

  • Helix Current Maximum

    5 mA

  • RF Cutoff Grid Voltage Typical

    -15 V

  • RF Cutoff Grid Voltage Maximum

    -30 V

  • Collector Voltage Typical

    100 V

  • Collector Voltage Maximum

    150 V

Capacitance

  • Cathode-All-Electrodes Capacitance Typical

    40 pF

  • Cathode-All-Electrodes Capacitance Maximum

    50 pF

  • Grid-All-Electrodes Capacitance Typical

    33 pF

  • Grid-All-Electrodes Capacitance Maximum

    45 pF

  • Helix-All-Electrodes Capacitance Typical

    101 pF

  • Helix-All-Electrodes Capacitance Maximum

    200 pF