Asked in Radio
Can HF radios communicate with UHF or VHF radios?
Asked in Radio
Can HF radio communicate with UHF or VHF radios?
No. The acronyms stand for different, non-overlapping frequency ranges. Since the #1 immutable requirement for radios to be able to talk to each other is that they be on the same frequency, and since HF, UHF, and VHF radios are by definition on different frequencies, that match would be harder to operate successfully than a mixed marriage.
Asked in Physics
What are the wavebands in order of increasing frequency?
Asked in Television and Video
What are the frequency ranges included in the following frequency subdivisions?
Asked in Physics, Electromagnetic Radiation
Which type of electromagnetic radiation includes the wave length 10-7m?
Asked in Physics, Electronics
What Amateur radio band is 2 meters in... UHF... VF?
Is the spectrum of an element limited to the visible region of the electromagnetic spectrum?
Asked in Fluid Dynamics
What are five common applications of waves in the electromagnetic spectrum?
Asked in Boats and Watercraft, Frequency Scanners
Can you get scanner frequencies for boats and ships?
Many ocean going vessels operate on HF bands and use satellite radios, none of which are accessible by most scanners. There are standard VHF frequencies/channels used by many boaters and ships though, and you can follow the link below for a complete list of them: http://www.navcen.uscg.gov/marcomms/vhf.htm
What is the difference between uhf and vhf?
For the benefit of a beginner , the typical VHF communications band is considered around 100 to 170 MHz (2 meters is 144-148 MHz and 220 is 219-225 MHz), UHF around 400 to 500 MHz (70 cm is 420-450 MHz, 33 cm is 902-928 MHz, 23 cm is 1240-1300MHz, also ham bands at 2300-2310 MHz and 2390-2450 MHz). FM radio would be VHF (88 - 108 MHz esp. in USA, 76-108 MHz in some other parts of world (e.g. Japan)) Cellular phones operate between 820- 920 MHz (approx) and 1805-1990 MHz with more spectrum added from time to time . When you get into 3 GHz (gigahertz or 3000 mhz) you are into microwave or RADAR frequencies . Another spectrum is called HF (High Frequency) , from 3-30 MHz. It was called HF because in the 1930's it was as high as they could go , but the label is still used in the Amateur Radio lexicon. From a US. Dept. of Commerce poster: VLF (Very Low Freq.) = 0 - 30kHz (audio) LF (Low Freq.) = 30 - 300 kHz (eg, Loran) MF (Medium Freq.) = 300kHz - 3MHz (eg, AM broadcast) HF (High Freq.) = 3MHz - 30MHz ("short wave") VHF (Very High Freq.) = 30MHz -300MHz (eg, FM broadcast, analog TV (VHF), civil aviation, analog public service) UHF (Ultra High Freq.) = 300MHz - 3GHz (eg, analog TV (UHF), analog cellphones) SHF (Super High Freq.) = 3GHz - 30GHz
Asked in Radio
How do CB skip work?
There's a level of the Earth's atmosphere called the ionosphere. Read the article on Wikipedia if you want specifics about that. Anyhow, the ionosphere can generally reflect radio signals of a frequency lower than 30 MHz back to earth... HF, VHF, UHF frequencies generally go right through it, which is why the line of sight limitation exists for these frequencies. CB radio runs in the 28-29 MHz range
Asked in Astronomy, Radio
What are the main methods and concepts in radio astronomy?
To measure RF emissions from a star, planet, or and also hearing radio emissions such as pulsars from a dying star system. VLF : For measuring the solar emissions and how it affects the D layer propagation on 27 kHz. And for radio emission that are happening on Earth. HF : For Jupiter and other gaseous systems. 18 to 24 MHz. VHF : Meteor skip monitoring on 75 MHz. UHF and Microwave : Star Observing and SETI (Search for Extraterrestrial Intelligence)
Asked in Jeep Liberty, Amateur Radio, Radio
How do you wire in a ham radio into a 2003 Jeep Liberty?
Power is best run directly from the battery. The power lines in the cab often do not carry sufficient, clean power. Just connect to the battery and route the wire through any available grommet or other opening in the firewall or drill and grommet a small hole in a safe location. As for antennas, it depends on what band radio you are running. for VHF/UHF, I drilled and mounted a small antenna on the roof im the middle near the tailgate. You can take the trim off around the healiner inside the tailgate and drop the headliner enough to allow you to drill and mount the antenna. I prefer the NMO mouting system. Other options for VHF/UHF would be a on the glass mount antenna that sticks to the side cargo windows. For HF, you'll need something bigger like maybe a trailer hitch mount or ball mount on the side.
Asked in Chemistry
How does the Hreaction relate to the Hf of molecules involved in a reaction?