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hi 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: 2271 | Votes: 6 | Rating: 7.33 ]
Antennas : Portable
  • Portable Rabbit-Ears Dipole Antenna - This handy and cheap portable dipole can be folded and backpacked, carried in use, and adjusted to a very wide range of frequencies by KV5R
    [ Hits: 1236 | Votes: 0 | Rating: 0 ]
Ham Radio : Band Plans
  • RSGB HF Data Band Plans - The following frequencies are assigned to datacommunications in the HF bands within the UK By RSGB data communications committee information.
    [ Hits: 2464 | Votes: 5 | Rating: 3.8 ]
Ham Radio : Blogs : Asia
  • Amateuradiomalaysia - This site is meant to assist all Amateur Radio members know the "ins" and the "outs" of how to enjoy the hobby of getting on the amateur radio frequencies, by 9W2SSJ & 9W2RYS
    [ Hits: 327 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : North Carolina
  • Shelby Amateur Radio Club's VHF Emergency Net - Shelby amateur radio club's VHF emergency net is open to all within the repeater's coverage area. 146.880 and 147.345 are the repeater frequencies. Shelby Radio Club is the sponsor of the Shelby hamfest.
    [ Hits: 870 | Votes: 9 | Rating: 8.67 ]
Ham Radio : Personal Pages
  • YY5OFW & YY5OFX - Information about Venezuela, frequencies, maps, photos, history, and related links
    [ Hits: 609 | Votes: 1 | Rating: 10 ]
Manufacturers : Antennas : HF : Vertical Antennas
  • KVK Antenna Systems - The manufacturer of the NuBeam, Vipole, and the multi-band Quad-Folded-Dipole (or QFD for short) antenna. Also have a unique multiband vertical which can combine operation on multiple HF frequencies as well as provide high gain on 50, 144 and 438MHz in a single antenna.
    [ Hits: 3973 | Votes: 1 | Rating: 1 ]
Operating Modes : Longwave
  • Frequency Calibration for Weak Signal Work - Accurate calibration of your receiver and sound card is necessary for good results with the weak signal modes in use at LF. Modern receivers with master oscillators that are synthesized to provide all conversion frequencies greatly simplify the process. This article describes a method of making the necessary measurements and adjustments to an ICOM R75 receiver and a sound card, using the ARGO software
    [ Hits: 872 | Votes: 1 | Rating: 7 ]
Operating Modes : Mobile
  • How to make your ham radio system mobile - How to make your ham radio system mobilemany ham radio operators carry radios for fun, safety and public service activities. radios for both vhf and hf frequencies can easily be installed in vehicles.
    [ Hits: 2240 | Votes: 2 | Rating: 5.5 ]
Operating Modes : Satellites
  • Ham Satellite frequencies - This listing was put together by ve7vdx on the USENET rec.radio.amateur.space, and is updated weekly there
    [ Hits: 6526 | Votes: 38 | Rating: 5.58 ]
Propagation : MUF Indicators
  • Current Optimal Frequency Charts - Optimal Working Frequencies (MHz) for High Frequency (HF) / Shortwave Radio. By region, updated monthy.
    [ Hits: 8817 | Votes: 14 | Rating: 4.93 ]
  • Near-Real-Time F2-Layer Critical Frequency Map - This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space. The map shows the radio auroral zones as green bands near the northern and southern poles.
    [ Hits: 5270 | Votes: 24 | Rating: 4.84 ]
Radio Scanning : Maritime Radio Scanning : Regional : Australia
  • Gold Coast Radio Scanner Frequencies - This web page is for all Radio Scanner listeners who live on or near the Gold Coast, Queensland. Australia
    [ Hits: 8424 | Votes: 76 | Rating: 5.75 ]
Radio Scanning : Regional : USA
  • Capitol Hill Monitors - Frequencies, links for scanners, email lists, online audio and more for Maryland, DC, and parts of Delaware and Virginia
    [ Hits: 1626 | Votes: 5 | Rating: 8 ]
  • ScanNewBedford.com - Welcome to scannewbedford.com. This site was built for people who would like to hear a live broadcast of New Bedford Massachusetts public services. There are also a few frequencies from other local towns such as Dartmouth, and Fairhaven being broadcasted on our live audio feed. The web site is free for everyone to use and pass along to another friend. Thank you and enjoy the Scan New Bedford Live Scanner Audio Broadcast of New Bedford`s Police, Fire, and EMS.
    [ Hits: 1691 | Votes: 11 | Rating: 6.45 ]
  • Long Beach California Frequencies - A complete list on Long Beach Frequencies. Long Beach Police Penal Codes, and Police 10 Codes
    [ Hits: 2716 | Votes: 9 | Rating: 3 ]
Shortwave Radio : Numbers stations
  • Spy Centre - All about Spy Numbers Stations, which send coded messages to agents. Includes schedules and frequencies of stations.
    [ Hits: 7257 | Votes: 11 | Rating: 7.74 ]
Software : Databases
  • Frequency Filer - Frequency Filer is database program designed for people who use a great many different radio frequencies. It is primarily intended for amateur radio operators, short-wave listening enthusiasts and scanner users. The program makes it easy to keep all of your important frequency information in one place, displayed in a logical format to facilitate easy retrieval. Frequency information can be displayed as a list and can be viewed on a world globe. Other features include easy data backup and custom field names. Included is database import utility that can be used as a general file conversion utility. The globe display can also be used as general geographic aid for countries, cities, states, rivers, and lakes. You may even find your home town. Windows Shareware
    [ Hits: 4424 | Votes: 6 | Rating: 6.5 ]
Software : Utilities
  • Defpom's CB Radio Simulator - It is a application which can be used for troubleshooting CB radio faults, by giving a graphical display of the normal operating frequencies generated by various parts of the CB radios circuits, it can help you identify if a frequency is incorrect or even missing. Another good use for this software is simulating possible frequency expansions, as it allows you to choose any frequency that the PLL is capable of generating, so you can see what the radio will allow you to get !
    [ Hits: 1682 | Votes: 1 | Rating: 10 ]

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