Spend a few minutes reading this two-way radio frequency guide and learn the basics of two-way radio frequencies. These radio services are designed for different types of usage and each has its own regulations. This is an overview of the various services and bands of frequencies.
This is a radio service similar to citizens band that does not require a license to operate. The FCC set aside these frequencies for two-way, private data or voice communications over a short distance.
Using radio repeaters and transmitting above 2 watts with MURS is not allowed. Longer radio waves are able to cover a greater distance with less power. However, they work best in outdoor areas with fewer obstacles. VHF radio antennas tend to be longer than UHF radio antennas so they can transmit over a longer distance and accommodate the frequency range. As its name suggests, it is meant as a personal radio service and is not intended for business use.
UHF two-way radios are best if there will be any indoor use, because the shorter radio waves can more easily penetrate obstructions that are found inside buildings.
Higher frequencies are also preferred for outdoor urban settings with many obstructions and areas that are hilly or have a lot of trees. The higher the frequency, the smaller the antenna size can be, and with a portable walkie-talkie antenna, this allows for maximum portability and a smaller design. The range is similar to UHF and MHz digital radios work well indoors, but usually do not cover as great a distance outdoors.
This band can be used by anyone of any age and for any purpose. An FCC license is required to use these frequencies. I agree to have my personal information transfered to MailChimp more information. Create Account Signup for eNewsletter Call Signup for our Newsletter! If you are a human and are seeing this field, please leave it blank.
Join over 3. We hate spam. Your email address will not be sold or shared with anyone else. Two Communications.Radio waves that carry mobile communications are defined by a frequency that is expressed by a number measured in megahertz. This number represents a range of frequencies and not the cell phone frequency itself. Bands that carriers use are numbered and may be assigned to one exclusive carrier, or shared by many carriers.
The MHz cell phone frequency range is comprised of multiple bands 12, 13, 17, etc. Cellular phones, repeaters, amplifiers, and antennas are frequency-specific. The boosters you buy need to support the cell phone frequency used by your carrier in the area you plan to use them.
PRO-CELL signal boosters are compatible with all cell phone carriers and all phones on the five major frequencies listed above. You can easily determine the frequency of your cell phone in your given area.
Visit wirelessadvisor. A list of all the cell phone carriers in your area will appear. They may have more than one frequency listed, and which one they use at a given time can depend on your location. Cell Phone Frequency Guide Cell Phone Frequency Guide Radio waves that carry mobile communications are defined by a frequency that is expressed by a number measured in megahertz.
Cell phone signals are simply radio waves that operate on various frequencies: 3G normally operates at the MHz and MHz frequencies. Cell Phone Frequency Lookup You can easily determine the frequency of your cell phone in your given area. Cellular U. Shop Now We make it easy!
Radio Shortwave Frequency Guide
Our three cell boosters are compatible with all carriers and devices. Call Berk-Tel Visit Gainbars.It allows users to communicate in a large geographical location and is safe to use. Let this quick guide help you develop a deeper understanding of the shortwave radio technology that we use today. Shortwave radio is an audio network that operates on frequencies in between the FM and AM bands. Its primary advantage is that data can be transferred throughout long distances and can reach the masses through one transmitter.
Messages and sound are transmitted through electromagnetic waves that range from 10 to 80 meters long feet. Each wave has a frequency length of about 2. Due to their extended length, shortwave radios are mainly used for international broadcasting, maritime communications, and amateur radio stations.
Shortwave bands are frequencies that can be used inside the shortwave radio spectrum. The effectiveness of the bands depends on the level of solar activity, time of the day, and the location of the station. Shortwave bands are frequencies where a radio station is located. On some radios, the frequencies will appear as kHz, kHz, or kHz. On other radio equipment it will look like Shortwave bands have names such as 41 meters, 33 meters, and 50 meters to note what radio stations are within them.
They are usually abbreviated to 41m, 33m, and 50m. Here are 14 of the most common band frequencies that are used throughout the shortwave radio network. Make sure to have your radio on during the desired time to get an accurate signal and a clear sound.
The signals are made via limited local coverage and line of sight. On average, FM radio stations have a radius of miles depending on the antenna placement and the power of the antenna.
Amplitude Modulated AM bands have frequencies within a kHz and are used to reach local and regional audiences. The Voice of Hope is a kilowatt station founded in Israel and uses AM bands to broadcast up to miles during the day. During the evening, this reach expands up to miles due to Skywave an enhanced radio signal that occurs in the night. Before shortwave radios were invented, data and information were sent through longwave radio networks.
However, this system had a multitude of drawbacks. Longwave radio transmitters required expensive antennas, transmitters, and receivers. Because of this, communication computers opted for shortwave radios because they were more cost-effective. Additionally, radio operators discovered that the shortwave bands can create long term communication.
Beforehand, long-distance communication required surface wave propagation which would reduce the low-frequency signals. The longer the signals and the higher the frequencies meant for a longer signal reduction. This problem would remain prevalent until the s era began. During the s, the US created their first attempt to transmit radio frequencies over long distances. As a result, shortwave radios began to receive success in the s.
This lead to further inventions and innovations within the communication industry. Since shortwave radios use sky wave propagation, the shortwave radio energy can be found in any location on earth. Skip zones were also included as a propagation of the shortwave radio. Skip zones are small disturbances in the radio frequency and are usually found during the evening.
Now, shortwave radios are the popular source of entertainment and news throughout highly developed regions such as North America, Japan, and Western Europe.
Some of the most well-known shortwave radio stations are Voice of America, British Broadcasting Corporation, and Voice of Russia previously voice of Moscow.
Besides being used for international stations, shortwave radios are used for telegraph and telephone conversations through long distances. Simply, shortwave radios work through radio waves.Read more From all of us here at CB World, we wish you the very best.
Contact CB World! Citizens Band CB radio dates back to the s. Ham Service's channel 11 to form a band megacycles UHF for personal and business communication, as well as for controlling model aircraft.
Business communication is still banned from Amateur Radio channels, so CB has taken over that role.
That makes sense, as less expensive CB equipment offers the general public the chance to communicate with each other short distances over various CB frequencies without the expense, study and then the waiting period for getting an FCC license. Class A and B radio services were established inwhich formed the basis of the Family Radio Service. Ten years later Class D was established, becoming the forerunner of CB radio. CB radio channels have expanded.
Class D began with only 23 channels, but more were added to bring CB to the current 40 channels in Back in the 70s, CB became very popular. There was an oil crisis when OPEC, a group of oil producing countries, declared an oil embargo. The U. The embargo caused fuel shortages and that led to rationing, which made it difficult to locate gas supplies.
That's when CB radio use exploded.
Using CBs, drivers could find fuel sources and communicate the location to others. They could also alert others to speed traps. Truckers' wages depend on the miles driven, so their productivity and thus their wages were negatively impacted by the 55 mph speed limit. Truckers protested the lower speed limits by setting up highway blockades, using their CBs to organize and carry out those protests. A list of CB frequencies and CB radio channels follows.
Note that the channel numbers are not necessarily sequential with frequency e. The frequencies The following table presents the CB frequencies, the particular wavebands at which a signal is transmitted. The next columns list the corresponding 40 CB channels and the customary uses of the channels. Any authorized CB radio frequency is open to all, but some have agreed-upon special purposes. For instance, channel 9 is for emergency use, and channel 19 is used by truckers to report on traffic conditions.
Channel 19 is at the middle of the bands, thus has the best antenna efficiency. Channel 9 is used less often for emergencies since the advent of cell phones, but some rural communities still monitor that channel for emergencies. Those who want information or wish to contribute appropriate information on specialized channels are welcomed, as are listeners.
Listening is an important step for beginners, especially on channel Truckers have their own handles names and jargon, and many do not welcome non-truckers on the channel.The best national resource for frequency information is found at www. Frequencies, communications systems and more! Analog Conventional 2. Analog trunking 3.
Digital scanner cover all three types of systems The type of scanner needed is determine by the communications systems in use in your area. What is an Analog Conventional Scanner? Analog conventional scanners do not pick up trunking, digital, or MHz systems. These scanners are non digital that pick up both analog conventional and analog trunking scanning them at the same time. Trunking is a system which multiple agencies are sharing the same system.
One individual department conversation jump from one frequency to another. Most system there is one frequency called a Control Channel, this channel sounds like a buzz-saw if monitored conventional. The Control Channel is the brain of the system, assigning each user on the system a frequency when transmitting.
Site 1 - Portland - This software looks very much like a spreadsheet. You can enter the data into the appropriate fields. The other option is to leave the programming to us with our HomeTown Programming Service. Digital communications are transmitted in ones and zeros like computer binary code, or like Digital TV. Digital scanners decode both a digital signal and receive analog signal. Digital scanner cannot pick up encrypted communications, or cell phone calls. Click here to see our full line of Digital Scanners.
Did you buy the right scanner? You can check by simply visiting our sister website policescanners. This website will tell you what types of communication systems are in use in your area.Don Schimmel's Radio Intrigue. Joe Carr's Tech Notes. Frequency vs. Modes and Modulation. Call Sign Prefixes. Introduction to Shortwave Listening. Tuning kHz to 30 MHz. Selecting a Shortwave Radio. Reporting and QSLs.
Modern Shortwave Receiver Survey. Introducing the "Action Bands". The World Above 30 MHz. Selecting a Scanner. National Scanner Frequency Guide. Clandestine Radio. Numbers Stations. Shortwave Listening. International Broadcasters. Scanner Listening.
Web-Controlled Radios. Top of Page Most frequencies above 30 MHz are assigned on a local basis. To know where to listen for your local police or fire department, you'll need a frequency guide or directory for your locality.
However, some frequencies, particularly those used for emergency or inter-agency communications, have been allocated nationally. The following is a list of some of the more widely used and active national frequencies. Program these into your scanner and get see what you can hear! During periods of exceptional propagation, this frequency is filled with signals from hundreds or even thousands of miles away.
If you're hearing distant signals here, then the 30 to 50 MHz range is also open for long distance reception. Circuses, exhibitions, trade showsand sports teams are some of the users you can hear. Other widely used itinerant channels are All ships must monitor this frequency while at sea.
It is also heavily used on rivers, lakes, etc. Air Force. Coast Guard aviation. Navy aviators. All rights reserved. Most frequencies above 30 MHz are assigned on a local basis.We use frequencies associated with various mental states of being, so that by using our music you can entrain your brainwaves to either a specific frequency, or to emit frequencies in and around a certain range, with the intention of achieving the brain state associated with that frequency.
For the majority of music in our catalogue, we tune the instrumentation of the composition to a specific frequency that complements the intended state of entrainment, unless a different tuning is required for effectiveness.
For this, we reference the Solfeggio frequencies, which make up the ancient 6-tone scale used in many sacred forms of music, including the beautiful Gregorian Chants. Each Solfeggio tone is comprised of a frequency that has a particular effect on the mind and body such healing, relaxation, balancing chakras and in general keeping the mind and body in harmony with nature. To put this in less technical terminology, and to provide a clearer example, when we create a track that contains binaural beats frequencies that help you sleep better, we also tune the music instrumentation to promote a feeling of deep relaxation too.
We find this to be very effective because it means the composition the whole song is working towards the same goal. We appreciate that the information on this page is quite technical and that many of our customers may not completely understand the terminology used.
In the meantime, if you would prefer a simpler explanation of how our music works, you can find one by clicking here. Please note: The frequency descriptions below are based on the minute versions of our recordings. When a particular frequency is stated to play for a specific duration, this time frame will be doubled for our 1-hour versions.
For explanations on why specific frequencies are used, please visit the individual product pages in our store. For example: to go from 12 Hz to 9 Hz, we might step down 1 Hz per minute, remaining at 11 Hz and 10 Hz for one minute each.
Each Chakra is activated for approximately 4 minutes 30 seconds by using its corresponding frequency, as follows:.
Dear James, I am glad to tell you that I passed my exam successfully. Using your music not only the brain power one every day helped me a lot. Thank you for the creation of such beneficial music. This is a marvellous audio. I listen up to an hour right at bedtime and always fall asleep within a few minutes. It is also helping me stay asleep longer which has been my main sleep issue waking up times and often having trouble falling back to sleep …I have a total of 9 of […].
I love it. I have tried many different BB recordings from other providers with varying results. I tried yours last night and WOW! Mindful Media. Binaural Beats Frequency Guide Please note: The frequency descriptions below are based on the minute versions of our recordings. Spiritual Awakening Frequency: Starts at 7. Ramps down to 3. Ramps up to 7. Instrumentation: Tuned to Hz to promote a return to spiritual order. Lucid Dreaming Frequency: Starts at 7 Hz. Ramps down to 3 Hz by 5 mins.