How The World Communicates
 
  LF/VLF Case Histories
Continental Electronics has created LF and VLF solutions for some of the world's most important governmental and military projects. Our work has made it possible to literally communicate over the horizon, under the seas and into space in ways that once were only the dreams of science fiction. Learn more about how we've led the way in innovative uses of RF in the Low and Very Low Frequency ranges.
 
  Case Histories
You'll be surprsed to learn about the ways we've used RF technology to innovate some very impressive accomplishments:

FM Broadcast Case Histories
Shortwave Case Histories
LF/VLF Case Histories
Science/Industry Case Histories
  Continental History
Long before founding Continental Electronics in 1946, our Founder J.O. Weldon was a leader in the RF industry. Over the ensuing 7-decades, Continental has continued to show the way. Learn how our work has literally defined the science and applications of RF technology.
  News
We're still making history, today! Learn how Continental is customizing RF technology to meet today's needs, and see what amazing things we're creating for our current clients.

 

 

LF/VLF Case Histories

Low Frequency / Very Low Frequency
 

Continental Electronics has extensive experience in the design, development, manufacturing, and installation of complex RF communications stations throughout the world including VLF submarine communications, LF timing stations, HF over-the-horizon and surface-wave radars, and many customized design-to-spec applications for commercial and government uses alike. . Transmitters from 1MW to 2MW output power have been built for naval stations around the world since the 1960s.

 

LF/VLF Case Study 1:
Arecibo

Continental Electronics has earned recognition in scientific circles with its 1MW planetary radio transmitter, a key component behind the Arecibo Observatory's radio telescope. The Arecibo radio telescope is the world's largest single-dish radio telescope. With the support of CEC's engineering expertise, NASA scientists were able to map the moon in preparation for the historic lunar landings.

 

LF/VLF Case Study 2:
HAARP

One of our largest active program is HAARP, a collection of 132 transmitters provided by Continental Electronics over a 3 yr. period. Continental was awarded the program for the design and supply of a ten kilowatt average output transmitters for the Ionospheric Research Instrument (IRI) for the HAARP program in Gakona, Alaska.  The transmitters are designed as  paired sets of two 10 kW transmitters, using a common power supply and control system.  Each of the eighteen transmitter pairs feeds a crossed dipole pair.

Several of other large installations have recently undergone upgrades performed by CEC, extending their service lives well into the 21st Century. VLF submarine communications, LF timing stations, HF over-the-horizon and surface-wave radars, and many customized design-to-spec applications for commercial and government uses alike. 

 

LF/VLF Case Study 3:
VALUE
(VLF Ashore Lifetime Upkeep Effort)

In 1999, Continental received the follow-on contract to TKAP for an additional $35 million in renovations and upgrades to the Navy's worldwide submarine communications sites.  These upgrades, known as the VALUE program, replace old control systems with state-of-the-art computer systems, and at the same time, remove and replace all the aging wire in these multi-megawatt transmitters.  The station in Cutler, Maine, is to be changed to dual frequency operation.  Numerous equipments nearing obsolescence are being replaced.

CEC is drawing upon more than five decades of experience in designing, developing, and installing VLF systems and other communications technologies to provide the Navy with the world's most advanced, reliable communications networks available. The new upgrades, which include software and hardware, will bring a high level of automation to
the VLF communications network.

"The U.S. Navy trusts CEC's equipment with one of the world's most vital broadcast communications networks because of our proven reliability. We apply that same level of reliability to commercial applications because we believe all of our customers deserve the same dependability," said David Burkey, CEC president. "We deliver the identical level of expertise, quality and commitment to our AM/FM and digital television broadcasting customers that we provide the Navy because they have mission-critical needs as well." The Navy has already exercised part of the contract by placing an order for more than $5.1 million in modifications to the Naval Radio Station, Jim Creek in Arlington, WA. The Navy is expected to (and DID) exercise its options to upgrade additional VLF broadcast network sites annually for the next four years.

The VLF technology, the radio spectrum between 3 kHz and 30 kHz, has been used for naval submarine communications since the first systems were designed and installed by CEC during the 1950s and 1960s. The VLF system is the most reliable form of long distance and underwater communications ever developed, even under the most adverse conditions. The VLF signals can penetrate solid rock and the ocean surface, both of which block radio waves at higher frequencies. In 1991, CEC was awarded another U.S. Navy VLF contract for the Transmitter Keep Alive Program (TKAP).

In addition to its demonstrated expertise in VLF transmission technology, CEC is an established player in the AM/FM and High-Power short-wave broadcast industries, with an equally impressive track record for engineering quality and reliability in its commercial systems. CEC has successfully combined its strength to design, develop and deliver the world's most advanced digital broadcast equipment for commercial and military applications.

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