How The World Communicates

  LF VLF Transmitters  

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Learn how Continental has been an innovative force in the development of complex RF communications systems designed to serve and supporrt US interests.


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Continentals Very Low Frequency (VLF) and Low Frequency (LF) transmitters serve a critical role in providing reliable communications between military commanders and their submarines and surface ships around the globe. Continental has more than 50 years of experience in VLF and LF communications including turnkey projects such as the well known Cutler, ME VLF station (NAA) that utilizes a Continental 2,000kW transmitter. Our transmitters are so widely deployed that at any time, at any location on earth, a Continental VLF transmitter signal can be received.

Continental has developed, in cooperation with Transradio, a complete line of VLF and LF solid state transmitters that incorporate the latest advances in digital modulation techniques. By combining sophisticated digital signal processing with high efficiency power amplifiers Continental offers VLF and LF systems that require less energy and significantly smaller antenna footprints without sacrificing signal penetration or coverage area.

Continental LF transmitters are also used in familiar non-military applications such as radio controlled clocks, also known as timing stations. Well known installations utilizing Continental transmitters include WWVB in the US and JJY in Japan.

Click here to see many of our LF/VLF Installations.


Continentals Very Low Frequency (VLF) and Low Frequency (LF) transmitters maintain the same common features:

  • Durable solid state FET H-bridge amplifier technology with onboard fault protection.
  • Low RF switching losses.
  • Ability to operate over very wide load angle ranges necessitated by VLF usage.
  • Ability to source and sink current to handle dynamic antenna characteristics.
  • Simple air-cooled technology.
  • Power level from 50kW to 2,000kW.
  • Frequency range from 10kHz to 500kHz customized per customer specification.
  • Digital signal processing for lowest possible bit error rate (BER) utilizing smallest possible antenna size.*
  • Overall transmitter efficiency in excess of 80%
  • Maximum reliability and availability afforded by multiple power modules with active and passive reserve redundancy.




LF / VLF Transmitters