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- Q17098776 subject Q10210014.
- Q17098776 subject Q8382312.
- Q17098776 abstract "In electronics, a Lecher line or Lecher wires is a pair of parallel wires or rods that were used to measure the wavelength of radio waves, mainly at UHF and microwave frequencies. They form a short length of balanced transmission line. When attached to a source of radio-frequency power such as a radio transmitter, the radio waves form standing waves along their length. By sliding a conductive bar that bridges the two wires along their length, the length of the waves can be physically measured. Austrian physicist Ernst Lecher, improving on techniques used by Oliver Lodge and Heinrich Hertz, developed this method of measuring wavelength around 1888. Lecher lines were used as frequency measuring devices until frequency counters became available after World War 2. They were also used as components, often called "resonant stubs", in UHF and microwave radio equipment such as transmitters, radar sets, and television sets, serving as tank circuits, filters, and impedance-matching devices. They are used at frequencies between HF/VHF, where lumped components are used, and UHF/SHF, where resonant cavities are more practical.".
- Q17098776 thumbnail Early_Lecher_line.png?width=300.
- Q17098776 wikiPageExternalLink 5N10_50.GIF.
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- Q17098776 wikiPageExternalLink V18N05_145.pdf.
- Q17098776 wikiPageExternalLink V18N05_163.pdf.
- Q17098776 wikiPageWikiLink Q10210014.
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- Q17098776 comment "In electronics, a Lecher line or Lecher wires is a pair of parallel wires or rods that were used to measure the wavelength of radio waves, mainly at UHF and microwave frequencies. They form a short length of balanced transmission line. When attached to a source of radio-frequency power such as a radio transmitter, the radio waves form standing waves along their length.".
- Q17098776 label "Lecher lines".
- Q17098776 depiction Early_Lecher_line.png.