Information Station Specialists is the best known source of travelers information stations, highway advisory radio, advisory signs and services needed to reach motorists with public service information. Learn more about Information Station Specialists.
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Underground Power
Why antenna grounding is important, how it works and is installed.
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AM Radio Antenna ANXX

Transmitter System

Assuring a Strong Signal
Every agency that has invested in an Information Radio Station wants a signal with suitable strength to achieve the FCC ‘s maximum permitted signal coverage. The level of AM signal an antenna system can generate is related to many factors, and one of the most important is the antenna’s counterpoise (grounding) and how it is designed and installed. The vertical “whip” portion of the antenna and the ground portion beneath together are responsible for the generation of the station's signal. In general, the more robust the grounding, the more efficient the antenna system and the stronger the resulting signal.
Horizontal Antenna Grounding Vertical Antenna Grounding Limited-Area Grounding
FlexPlane Factory-Assembled Groundplane

The FlexPlane is a pre-built groundplane composed of 32 insulated, high-flexibility copper ground radial wires bonded to a 5 foot lead line. Each radial extends outward 10 feet or more feet in every direction, creating a circular fan pattern. It is installed with its center directly beneath the vertical antenna. Also available in 25 foot radius and custom sizes, the FlexPlane comprises the most efficient AM grounding method available.

This groundplane is highly portable and is built for quick set-up in surface- deployed applications. It may be buried for permanent installations.

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Vertical Profile Antenna Support and Grounding System

A most cost effective and least intrusive antenna grounding method is afforded by the Vertical Profile Antenna Support and Grounding System. The active element is comprised of a cylindrical copper sheath attached to the buried portion of the aluminum antenna support pole. The conductive pole and sheath, together create an effective, compact grounding method. Installation costs are reduced, compared to horizontal grounding methods, because the pole and the grounding are one piece. Utilize this method when there is not enough physical room for a horizontal groundplane and when conventional signal levels are required.

Unirods provide an alternate means of grounding, and are useful in limited-area situations where conventional signal levels are adequate and the antenna is to be mounted on a tower, pole or other similar structure. The Unirod is a 10’ – 2” copper rod which is installed vertically into a core of highly conductive bentonite soil (provided).
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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Fax 616.772.2966, Email Form

The USA's best known source for information radio station equipment, related products and technical services.

 Trademarks: 2X Signal Booster, ALERT AM Emergency Advisory Radio System, ANXX AM Radio Antenna, AP55 Digital Message Player, ENcast Emergency Notification Broadcast System, FAS.6000 Flashing Beacons & Controller, FASTrack Quick-Erect Sign, FlashCAST Internet Broadcast Service, Flashing ALERT Sign System, FlexPlane Factory-Assembled Groundplane, Free-Radiate On-Premise Radio Broadcast System, HearMoreInfo Internet Broadcasts, HPR.0990 High Performance Antenna, i A.M. Radio Transmitter, Information Station Specialists, InfoRadio Format, Information Station Classic, Information Station IP, Information Station USB, InfOSpot AM Radio Transmitter System, IP8 Digital Message Player, IP.76 Digital Message Player, ITS.6000 Highway Advisory Radio Network, LIGHTNING LED Portable Changeable Message Sign, MGR.021 Digital Audio Management System, NX8R Digital Message Player, EventCAST Portable Information Radio Service, RadioSAFE Wide Area Emergency Broadcast System, RadioSTAT Portable Emergency Advisory Radio Station, RE 2.5 Range Extender Outdoor Antenna and Tuner, Severe Storm Detector, Signal Measurement Radio Receiver, Stealth Sign, StreamCAST Internet Broadcast Service, SS.3000 Free-Standing AM Radio Antenna System with Tower, Stylized ISS Logo, SX.200 Wattmeter, Talking House AM Radio Transmitter, TH.5 InfOspot Transmitter, TR.6000 Transmitter Model HQ 5.0, TMS.020 Digital Audio Management System, TR.6000 Transmitter Model 15.73, VoiceStar Portable Highway Advisory Radio Station (with or without Changeable Message Sign), VP.9000 Vertical Profile Antenna Support and Grounding System, Wireless Audio Link..

Information Radio Stations is a generic term synonymous with Travelers Information Stations (TIS), Highway Advisory Radio Stations (HAR) / Highway Information Systems & Low Power Radio Stations (LPR). Operation of the stations is governed by FCC Part 90.242 Rules. A FCC license is required. Information Radio Stations may be fixed or portable. Subcomponents may include transmitter, antenna and ground system, digital voice player, wateter, cabinet with conventional or Corbin locks, lightning arrestors for RF, power and telephone lines, coaxial cable. Most stations employ black maximized antennas to discourage ice accumulation and security measures to prevent unauthorized program access. Options include synchronization, battery backup, solar power, remote programming by local, network or telco, multi-station audio distribution via RF or LAN / WAN or wireless network.