Evaluation of High Power Tubes for Loran-C Use

Abstract

Problems in the operation of the EIMAC Y-711 Power Grid Tube when used in the second intermediate power amplifier of the AN/FPN-44/45 Transmitter have been encountered by LORSTAs DANA and EJDE. These problems involved numerous overloads and an inability to obtain rated transmitter output. Tests have been conducted to determine the nature, cause, and possible solution to these problems. The tests involved the operating parameters of the tube and transmitter such as tube dynamic characteristics, drive and pulse shape, biasing conditions, transmitter drive level, and tube high voltage breakdown level. The Y-711 tube exhibits a negative grid current region and will therefore overload the transmitter if overdriven. It is hypothesized that the problem encountered in the field is due to an imperfect drive waveform requiring higher drive levels than normal. Under correct conditions of pulse shape the tube works satisfactorily.

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Document Details

Document Type
Technical Report
Publication Date
Nov 11, 1976
Accession Number
ADA032811

Entities

People

  • Gary R. Sobotka

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Amplitude
  • Cathode Followers
  • Coast Guard
  • Electric Fields
  • Electrical Grids
  • Equivalent Circuits
  • Generators
  • High Voltage
  • Load Monitoring
  • Loran
  • Power Amplifiers
  • Pulse Generators
  • Resistance
  • Secondary Emission
  • Test And Evaluation
  • Waveforms

Readers

  • Electronics Engineering
  • Theoretical Analysis.