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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High Performance AM Radio Antenna
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Downloadable Specification Sheet


RadioSAFE System

Standard AM Radio Antenna

Free-Standing AM Radio Antenna System with Tower


High Power plus High Efficiency
This high performance AM radio antenna offers communication professionals the ability to establish an AM broadcast signal capable of reaching greater distances than before possible with antennas of similar design. Fully twice as efficient as comparable antennas, this high capacity antenna is compact and light-weight, making it easy to ship and install. It is also competitively priced.
Frequency Range Users
Different versions of the antenna's design allow it to function on any AM frequency in the 530 to 1710 kHz range. Field tests prove that this antenna is capable of handling hundreds of watts, producing a coverage pattern that can exceed 20 miles in radius. Common users are emergency managers and associated amateur radio operators who want to reach their publics during times when power, other communications and internet services are compromised. Commercial broadcasters can also benefit by using the High Performance AM Radio Antenna to keep their AM stations on the air temporarily at low power following calamities. And amateur radio enthusiasts who want a solution for special applications that can be installed in confined spaces will benefit.
Travelers' Information Station licensees can easily upgrade to the HPR.0990 Antenna because a similar mounting format. The antenna’s efficiency will allow a 10-watt signal to be produced that is two to four times that of the standard antenna, depending on frequency. A waiver is required from the FCC if the station’s field intensity would exceed 2.0 mV/m at 1.5 km (0.93 mile).

When utilized in higher-wattage applications As a higher wattage antenna as part of the RadioSAFE System, an emergency Special Temporary Authority (STA) from the FCC is required. See our Licensing Serivces webpage.

Engineering for the required waivers and STA’s can be supplied by Information Station Specialists.
  • Power: up to 300 watts - 50 ohms.
  • Frequency range: 470 kHz to 1800 kHz.
  • Type: center-loaded, bottom-fed vertical, whip-type antenna with capacitive hat. Omni directional. Anodized black aluminum finish. Adjustable tuning. Guying ring.
  • Radiation efficiency: at 45' tip height above ground on a 20’ metal support pole with 50’ 32-element groundplane (or Unirod grounding), varies from 54 mV/m/km (530 kHz) to 160 mV/m/km (1700 kHz).
  • Bandwidth varies with frequency (3:1 SWR): 530 kHz: 6 kHz. 1700 kHz: greater than 10 kHz.
  • Temperature endurance: -40°C to 85°C.
  • Wind endurance: minimum 100 miles per hour minimum. Additional wind endurance with the addition of guy wires.
  • Weight of the complete antenna varies with frequency from 27 lbs. (1700 kHz) to 40 lbs (530 kHz).
  • 4 Sections. Overall assembled length varies with frequency and tip extension required. Typical: 530 kHz; 385” (32‘). 1700 kHz; 354” (29.5’). Includes assembly hardware.
  • Recommended separation from buildings and structures: 100’ or equal to the height of the structure, whichever is greater.
  • Available options include matching transformer and lightning arrestor, coaxial cable and feedlines, guying kits, masts with insulators, fully assembled groundplanes and unirods.
  • RF exposure separation: 1 meter minimum recommended for both occupational and controlled environments.
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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 Emergency Advisory Radio Stations, Travelers' Information Stations, Highway Advisory Radio & related products/services.

 Trademarks: 2X Signal Booster, ALERT AM Emergency Advisory Radio System, ANXX AM Radio Antenna, AP55 Digital Message Player, ENcast Emergency Notification Broadcast System, FAS6000 Flashing Beacons & Controller, FASTrack Quick-Erect Sign, Flashing ALERT Sign System, Free-Radiate On-Premise Radio Broadcast System, HearMoreInfo Internet Broadcasts, HPR0990 High Performance AM Radio Antenna, i.A.M. Radio Transmitter, Information Station Specialists, InfoRadio Format, Information Station Classic, Information Station IP, InfOSpot License-Free Radio Station, IP8 Digital Message Player, IP76 Digital Message Player, ITS6000 Highway Advisory Radio Network, LIGHTNING LED Portable Changeable Message Sign, NX8R Digital Message Player, Potential Interference Notification Services (PINS), PowerPlane Flex  Factory-Assembled Groundplane, EventCAST Portable Information Radio Service, RadioSAFE Wide-Area Emergency Broadcast System, RadioSTAT Portable Emergency Advisory Radio Station, Signal Measurement Radio Receiver, SpotCAST Internet Broadcast Service, Stealth Sign, StreamCAST Internet Broadcast Service, SS3000 Free-Standing AM Radio Antenna System with Tower, Stylized ISS Logo, SX200 Watt Meter, Talking House AM Radio Transmitter, TR6000 Transmitter Model HQ5.0, TR6000 Transmitter Model 15.73, VoiceStar Portable Highway Advisory Radio Station (with or without Changeable Message Sign), VP9000 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.