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Antenna mounted tuning indicator

  • US 4,167,738 A
  • Filed: 06/27/1977
  • Issued: 09/11/1979
  • Est. Priority Date: 06/27/1977
  • Status: Expired due to Term
First Claim
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1. Apparatus for use in tuning an antenna system the antenna rod unit of which mounts exterior to a vehicle comprising a body having a fixed opening therein constructed and arranged to mount to the antenna simply by the projection of the antenna rod unit within said opening, said body embodying therein coil means arranged by the mount of said body to position in immediate, spaced proximity to a portion of said antenna rod unit which positions within the limits of said body, in an orientation which disposes it at an essentially right angle thereto, said coil means forming the secondary of a transformer, the primary of which is provided by the portion of the antenna rod unit which positions within the limits of said body, and said coil means including in connection therewith a device incorporated in and forming a part of said body to signal from said body the tuned or untuned condition of the antenana unit to which the body is applied, said coil means being arranged to sense the R.F. current at the base of said rod unit and said body being free of any physical electrical connection to the antenna rod unit or any structure in connection with the vehicle to which it mounts.

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