uhf frequencies

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uhf frequencies

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Antennas : Magnetic Loop

  • Thinking about Ideal Loops - Loop antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.
    [ Hits: 2270 | Votes: 6 | Rating: 7.33 ]
Antennas : Microwave
  • Cavity antennas - Cavity antennas are weatherproof antennas for UHF and microwave frequencies. Require more metal for the same decibels of antenna gain but a cavity antenna is relatively easy to weatherproof.
    [ Hits: 305 | Votes: 2 | Rating: 5.5 ]
Manufacturers : Antennas : VHF UHF Microwave : Mobile Antennas
  • US Communication antennas - UnderBumper diversity licence plate antenna system (front and rear license plates) become the antennas. Available in VHF, UHF, Dual Band and other frequencies. We also manufacture mobile antennas for HF VHF UHF wideband antennas
    [ Hits: 580 | Votes: 0 | Rating: 0 ]
Operating Modes : Repeaters
  • Ham Radio: Using Repeaters - The most basic form of repeater receives communication on one frequency and re-transmits at a different frequency. This is known as duplex communication. Repeaters are generally set up to operate with FM modulation on the amateur bands within the VHF (30 MHZ – 300 MHZ) and UHF frequencies (300 MHZ – 3 GHz). These are generally the frequencies used by handheld and mobile devices.
    [ Hits: 92 | Votes: 1 | Rating: 8 ]
Operating Modes : Repeaters : Repeater maps
  • UHF VHF Repeaters in Italy - List of VHF UHF ham radio repeaters in italy with frequencies and locations
    [ Hits: 2435 | Votes: 15 | Rating: 6.15 ]
Operating Modes : VHF UHF Propagation : Beginner's Guide
  • Exploring the Spectrum From HF to UHF Frequencies - During radio's early days, high frequencies were under 30 MHz due to technical limitations. As understanding grew, components improved, allowing for higher frequencies like VHF and UHF up to 3 GHz. The HF band's long wavelengths provide unique propagation challenges influenced by solar activity. VHF and UHF bands face diffraction and reflection issues but offer diverse applications, from amateur radio to 5G and GPS technologies.
    [ Hits: 54 | Votes: 0 | Rating: 0 ]
Radio Scanning : Maritime Radio Scanning : Regional : Australia
  • Sydney Scanner Frequencies - One of the best compilations of frequencies in Sydney particularly SW. Include Police, other emergency people, Marine, the entire aircraft list for Sydney, RAAF squadron frequencies, UHF CB frequencies as well as a heap of miscellaneous frequencies like security, shoppin malls etc.
    [ Hits: 14046 | Votes: 59 | Rating: 6 ]
Radio Scanning : Regional : Europe
  • UK Scanner Frequencies - The UK Scanning Directory - HF, VHF and UHF UK Scanner Frequencies Database Updated Daily by a dedicated group of Radio Amateurs and SWL Listeners
    [ Hits: 2312 | Votes: 337 | Rating: 7.69 ]
  • UK Scanner Frequencies - UK frequency list provide reference table to lister to Police scanner channels UHF VHF, Amateur Repeaters, Ambulance CB Radio CoastGuard Rescue, marine VHF, Military and more.
    [ Hits: 140 | Votes: 1 | Rating: 1 ]
Radio Scanning : Regional : USA
  • Wisconsin Scanner - Wisconsin UHF VHF scanning frequencies
    [ Hits: 196 | Votes: 0 | Rating: 0 ]
Shopping and Services : Antennas : VHF Antenna
  • Specialist Antennas - Antenna products and accessories for commercial, industrial, Emergency Service and military applications covering VHF, UHF, TETRA, ISM and GSM frequencies and beyond.
    [ Hits: 485 | Votes: 0 | Rating: 0 ]
Shortwave Radio : SWL Resources
  • Monitoring the Crisis in the Balkans - By the Monitoring Times Staff, NATO HF Frequencies, NATO Common VHF/UHF Frequencies and English Language Shortwave Broadcasts from the Balkans
    [ Hits: 1167 | Votes: 1 | Rating: 8 ]
Technical Reference : Duplexers
  • VHF-UHF Diplexer - Diplexer is a passive device, a special filter circuit that seperates 2 different bands, not to be confused with the duplexer that usually separate 2 different frequencies on the same band.
    [ Hits: 1133 | Votes: 2 | Rating: 5 ]
Technical Reference : Software Defined Radio
  • DSP-10 2-meter DSP transceiver - The DSP-10 is an amateur-radio, software-defined 2-meter transceiver that can be built at home. It operates not only on SSB, FM and CW, but also on four Weak-Signal modes. Features are tailored to operation on VHF, UHF and Microwave frequencies. By W7PUA
    [ Hits: 15565 | Votes: 39 | Rating: 8.03 ]

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