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Free-Standing AM Radio Antenna System with Tower
Our High Efficiency Antenna System

Related Links

Standard AM Radio Antenna

High Performance AM Radio Antenna

Vertical Profile Antenna Support and Grounding System

ITS6000 Highway Advisory Radio Network

The High Efficiency Antenna System produces a signal intensity, which, with FCC allowance, is higher than possible using the standard antenna system (linked below). At 10 watts, the signal intensity may be 2.0 mV/m at 2.25 miles, producing a sign-able range of 8 to 12 miles. (Note:  Special FCC allowance for increased signal intensity is required.)

The High Efficiency Antenna System's 49-foot antenna/tower, antenna tuner and 30-foot groundplane are designed to be ground-mounted in an unobstructed area approximately 100 feet in radius for maximum propagation. A concrete pad supports the antenna, tower and tuner.
Antenna Tower
The tower is 21” square at the top and base and 48” high. It is a one-piece, galvanized steel tower with a hinged bottom plate that allows the tower to “tilt-down” to a 90-degree angle during antenna setup and erection. The tower includes a side mount for the antenna tuner. The antenna bolts to the tower through the tower’s top plate.

Antenna Tuner System
Provided in a weatherproof NEMA4 cabinet, the High Efficiency Antenna System tuner features tuning networks for both resistive and reactive components, lightning arrestor and ground bus on an aluminum panel.

A groundplane is the copper wire part of the antenna system buried beneath the antenna support. The PowerPlaneTM Groundplane is placed in a 6” to 12” excavation that extends outward 30’ in all directions and is covered with backfill. The groundplane consists of two central arcs of #4 bare stranded copper wire with 80 radials that extend outward in a circular pattern, provided in two halves for convenience.

Hardware & Accessories

  • Pad mounting bolts.
  • Antenna/Tower assembly hardware.
  • Conductive grease kit for antenna assembly.
  • Length: 44’.
  • Weight: 300 lbs.
  • Base diameter: 13”.
  • Material: filament wound epoxy glass.
  • Finish: epoxy polyamide paint.
  • Wind resistance: 180 MPH.
  • Ice load: 3/4” radial at 100 MPH.
  • Base section conductor: 8 copper braids.
  • Third conductor: 6 copper braids.
  • Assembly: 3 sections, each approximately 15' in length; 1/4", 3/16" and 3/32" hex allen head bolt connections.
  • Position of loading coil: base and second sections.
  • Top loading: 32” diameter sphere.
  • Power rating: 1 KW.
  • Dry withstanding voltage: 25 KV.
  • Temperature: -60 degrees F to 150 degrees F.
  • Base mounting: Eight .678” holes, equally spaced on a 10.75” circle.
  • Includes written documentation of safe RF exposure distance per ANSI/IEEE C95.1-1992 standard by a professional engineer (PE).


  • Quantity: single PowerPlane Groundplane System in 2 equal sections for convenience.
  • Radials in system: 80 minimum.
  • Radial length: 30’ each.
  • Radial size: #12 bare solid copper wire.
  • Bonding method: silver solder brazing with double weather-resistant coating.
  • Bonding arc size: #4 bare stranded copper wire.
  • Leads: #4 bare stranded copper wire, 15’.

Lightning Arrestor System

  • Capacity: 18,000 amps surge.
  • Clamping speed: fewer than 4 nS.
  • Connectors: UHF (2).
  • Ground connection: aluminum flange.
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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Fax 616.772.2966, Email

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, 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, , 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, Stylized ISS Logo, SX200 Watt Meter, Talking House , TR6000 HQ5.0 Transmitter, TR6000 15.73 Transmitter, VP.9000 Vertical Profile Antenna Support and Grounding System, VoiceStar Portable Highway Advisory Radio Station (with our without Changeable Message Sign), 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.