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VoiceStar Model T100 Technical Specifications *

Information Radio Station on Towable Trailer
Related Links

VoiceStar Main Page

Planning Steps

VoiceStar 100 Components 

VoiceStar T100 is a solar-powered, portable information radio station, commonly known as a Travelers Information Station or Highway Advisory Radio System. This system allows the user to transmit audible messages over AM radio. The system is battery powered with both solar and 110 VAC charging systems.


Requires FCC license granted to local government or health agency (FCC Rules Part 90.242) or by NTIA (National Telecommunications and Information Administration) for federal government agency or by US Military. Federal Compliance: NTCIP (National Transportation Communications for Intelligent Transportation Systems Protocol).

Standard Components
Transmitter (TR.6000 HQ 5.0)
  • FCC certified Travelers' Information (TIS) radio applications (Certification B7MTR-6000TIS-WB).
  • Manufactured in the USA.
  • 0-10 watt operation, Class D, duel output devices.
  • Approved for military and federal agencies use on 510-530 kHz, 1610-1710 kHz - Certification J/F 12/07677.
  • Synthesized frequency selection.
  • Frequency stability +/-20 Hz.
  • Frequency range: 530 to 1710 kHz AM.
  • 5000 Hz audio bandwidth with limiting.
  • Power and audio control relays.
  • Internal monitor speaker with volume control.
  • 24V DC; power consumption 36 watts.
  • 19” rack mount, 1 RU.

Digital Audio Management System

TMS.020 Browser-Based Audio Management System (LAN/WAN)

  • Local message selection via front panel control.
  • File format: MP3, WAV, FLAAC, OGG; (64-128 kbps recommended).
  • Network (RJ-45 Port).
  • Memory format: nonvolatile - no battery backup required.
  • Currently playing message displayed on front panel LCD.
  • Message loading via network upload or removable SD card.
  • Memory storage size 32GB minimum.
  • Message lengths: variable. Message playlists may be created and stored.
  • Message order: continuous sequential message play-out based on user-determined order.
  • Messages and playlists may also be triggered by HTML CGI commands.
  • Audio inputs and outputs: 600 ohms; RCA jacks; unbalanced.
  • Power: 120VAC/12VDC (2 watts); 150 ma @ 12VDC.
  • 19” rack mount format; 1 RU. Dimensions: 19” W X 1.75” H X 10” D.

Alternate MGR.021 USB-Based Audio System for Local/Redundant Programming

  • Playback: MPEG (.mp3).
  • Frequency Response: 20Hz to 20KHz.
  • Bit/Sample Rate: up to 128Kbps/48KHz.
  • Loading Type: USB flash drive.
  • Memory Type: flash.
  • Indicators: LED Status.
  • Controls: Speaker on/off; Output volume.
  • Memory Capacity: 34.7 hours @ 128 kbps.
  • Message Capacity: up to 1024.
  • Message Playback: continuous.
  • Power: AC Power Adapter to12VDC @ 500mA.
  • Audio Output: 8Ω or 600Ω RCA.
  • Size (H x W x D): 6.00" x 6.00" x 1.50".
Onboard Program Mixer (DN.1201)
  • 6 combination inputs with mic and line selector switches.
  • 6 mono RCA Inputs.
  • Mic monitor ¼” output.
  • Balanced XLR line outputs.
  • Mono ¼” line output.
  • AC or 24V DC power inputs.
  • Channel 1 priority control.
  • Master and Individual level controls.
  • 1U rack mountable.

AM Radio Antenna

  • Hinged erection system.
  • 3-piece construction.
  • Length varies with frequency.
  • Center loaded with tunable tip.
  • Black UV and ice-resistant finish.
  • AM lightning arrestor, 10' radius high-flexibility groundplane.
  • Frequency range: 530-1710 kHz.
  • Stored on trailer deck for transport.
FlexPlane Pro Preassembled Groundplane (PPFL.10)

See TechTalk article "Underground Power: Why Antenna Grounding Is Important, How It Works and Is Installed."
  • Preassembled, one-piece construction.
  • 32 elements.
  • 10' radius.
  • High flexibility stranded wire radials (16 AWG, 195-30 AWG strands per radial wire).
  • Connection wire: 5' length (4 AWG high flexibility stranded wire).
  •  The trailer shall be nominally 159 inches in length with the removable tongue in place and 79.2 inches in width. The trailer shall be nominally 188 inches in length if the optional expanded power configuration is chosen. Trailer length with tongue removed (storage position) shall be nominally 138” regardless of configuration.
  • It shall be constructed of 3"x3" and 3"x 5" steel tube (ASTM A36) with 1/8" wall thickness and shall be welded in accordance with applicable American Welding Society (AWS) standards.
  • The trailer shall have a lockable, weatherproof equipment cabinet housing for both transmission equipment and trailer connections.
  • The trailer shall also have lockable battery box for the power source batteries. An optional expanded battery bank may require an additional lockable battery box.
  • The trailer shall have a single axle and a fixed height ball hitch (fixed height tow ring and adjustable height ball or tow ring hitches optional).
  • The trailer shall be finished with either a powder coat finish or 2-coat automotive paint process to protect it from weather and road hazards.
  • The trailer shall possess all appropriate lighting on frame or tail lights with appropriate trailer electrical hookup (standard 4-pin plug connector connection).


  •  The trailer and springs and axle shall be rated for a minimum of 3000 pounds.
  • The removable tongue assembly with optional hydraulic surge brakes shall be constructed from 3” x 3” steel tube (ASTM A 36) with 3/8” wall thickness, rated for 6000 pounds and fitted with a 2” ball hitch. Wheels shall be 15” steel with 5 lug bolts per wheel and fitted with P205-75-15B-rated tires.

Removable Tongue:

  •  The removable tongue shall have safety chains attached.
  • No tools shall be required for removal or remounting of the tongue.
  • It shall not be necessary to disconnect any optional hydraulic brake lines to effect complete removal, and it shall not be necessary to bleed the optional brake system upon re-installation of the tongue.
  • The lighting lead shall be affixed permanently to the tongue and shall separate from the trailer wiring harness at a plug connector when the tongue is removed.

Leveling Jacks:

  • The trailer chassis shall have at each corner a 2000-pound leveling jack affixed in such a manner that the jacks may be readily placed and locked in a horizontal position for traveling without necessitating the use of any tools. The trailer and assembly, when stationary and supported properly with the leveling jacks shall withstand AASHTO rated 90 MPH wind gusts.

The 12 VDC power source for the system shall be a battery pack charged primarily by a solar array that provides power for the system.
  • The battery pack may consist of any of the following customer selected battery types (lead acid / AGM / lithium / etc.) that, when in a fully charged condition, shall provide sufficient electrical energy for the continuous and proper operation of the system for a nominal period of 30 days without the necessity of recharging.
  • Warranty service for the batteries shall be locally available on a nationwide basis from the batteries manufacturer.
  • A 110 VAC charging system is also standard on all units and available for landline operation of the system. control of the power supply shall be provided by a power management system that shall regulate the charging of the batteries by the solar charging system and shall provide for temperature compensation, regulation, and distribution of power to the various functions.
  • Charging:  the system shall be equipped to provide for the charging of the 12 VDC power source batteries by either a solar charging system, or alternatively, by a 110 VAC charging system.

Solar Charging System:

  •  The solar charging system shall consist of a photovoltaic array mounted at the top of the case and a power management system.
  • The system shall provide regulated, “on demand” charging consistent with battery condition, with the ambient solar luminance at the photovoltaic array and with net power consumption within the system.
  • Charging of the batteries shall be independent of the position of any switch on the control panel. Initiation of 110 VAC charging service shall completely disconnect the solar array from the charging circuit.

110 VAC Charging System:

  • The 110 VAC charging system, supplied as standard equipment, shall consist of a temperature compensating, 110 VAC input battery trickle charger, an ammeter for monitoring the charging process and an electrical receptacle mounted on the control pedestal.
  • The system shall be configured to initiate charging of the power supply batteries when the 110 VAC service is connected without the necessity of operator intervention and shall be capable of completely charging the battery pack within a 72-hour time period in general. The actual charging time will vary depending upon conditions and state of charge/discharge of the batteries. Batteries should always be inspected for fluids, cracks, damage to terminals, etc., to ensure they are able to be charged / recharged.
Associated Materials
  • Illustrated instruction manual.
  • All wiring, connectors, mounts and hardware.
  • Test equipment: wattmeter and dummy load for antenna tuning and system diagnosis.
Required Utilities
  • For charging batteries: 110/220-volt AC, single phase/50/60 Hz, less than 1 amp AC operating current, 4-amp maximum AC charging current (20-amp breaker, nonGFI circuit).
  • For wireless changeable message sign and radio message operation: standard cellular data account.
Commonly Supplied Services
Lifetime Remote Technical Support
Frequency Search and FCC Licensing
Onsite Training and FCC-Required Signal Study
(*) These specifications are subject to change without notice.
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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Email Us

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Information Radio Station is a generic term synonymous with Travelers Information Station (TIS), Highway Advisory Radio (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, wattmeter, 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.