hf frequencies

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Search Results for "hf frequencies"

43 links

Antennas : 80M
  • A magnetic loop antenna for HF  pop - Able to cover all frequencies between 3.5 and about 10 MHz, the loop described here is directional, does not require a radial system, and stands just 1.8 metres tall. Most parts needed can be purchased at a hardware shop. The antenna can be put together in an afternoon and requires only hand tools to assemble. It should cost less than sixty dollars to build. by Peter Parker VK3YE ex VK1PK
    [ Hits: 85459 | Votes: 27 | Rating: 4.45 ]
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: 1685 | Votes: 0 | Rating: 0.00 ]
Antennas : Multiband
  • Crossed-Wire HF Antenna - This Crossed-Wire Electrically-Steerable HF Antenna, capable of transmitting signals over the entire 1.8 to 30MHz HF range, and capable of receiving signals at much lower frequencies is basically a crossed centre-fed wire system, consisting of four thin wires brought to a central mast by G3YNH
    [ Hits: 4737 | Votes: 2 | Rating: 10.00 ]
DX Resources : Nets
  • HF Hamtrader Nes - Trader net frequencies
    [ Hits: 2203 | Votes: 3 | Rating: 5.33 ]
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: 2232 | Votes: 4 | Rating: 4.50 ]
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: 724 | Votes: 9 | Rating: 8.67 ]
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: 3414 | Votes: 1 | Rating: 1.00 ]
Manufacturers : Antennas : VHF UHF Microwave : Yagi Antennas
  • RF HAMDESIGN - An engineering oriented organization specializing in the design and manufacture of high performance parabolic antennas, 3dB high power RF couplers, Antenna power splitters, directional RF couplers and more items for RF transmission from HF through Microwave frequencies.
    [ Hits: 1339 | Votes: 4 | Rating: 9.00 ]
Operating Aids : Radio Spectrum
  • PSK31 Frequencies - HF VHF UHF PSK31 proposed frequencies
    [ Hits: 1503 | Votes: 9 | Rating: 2.88 ]
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: 2027 | Votes: 2 | Rating: 5.50 ]
Propagation : MUF Indicators
  • Current Optimal Frequency Charts - Optimal Working Frequencies (MHz) for High Frequency (HF) / Shortwave Radio. By region, updated monthy.
    [ Hits: 7799 | Votes: 11 | Rating: 5.09 ]
Radio Scanning Radio Scanning : Maritime Radio Scanning : Military
  • Iraq War Frequency Info. - IRAQ War Military HF freqs, Aero HF frequencies and Shortwave Broadcast schedules of interest
    [ Hits: 9269 | Votes: 32 | Rating: 6.41 ]
  • High Frequency  updated - Radio frequencies for HF-GCS, ARINC, MWARA, and military stations
    [ Hits: 5959 | Votes: 16 | Rating: 6.06 ]
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: 12084 | Votes: 59 | Rating: 6.00 ]
Radio Scanning : Regional : Europe
  • UK Scanner Frequencies  updated - 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: 1492 | Votes: 132 | Rating: 7.83 ]
Radio Scanning : Regional : USA 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: 1100 | Votes: 1 | Rating: 8.00 ]
  • Scaning The Utilities - Hf, vhf, and uhf utility listening, police frequencies, shuttle, aero, usaf callsigns and many other services
    [ Hits: 3130 | Votes: 8 | Rating: 3.00 ]
Software : Circuit Design
  • RF Filters - MS DOS Program for calculations of HP, LP and BP filters at VHF and UHF frequencies up to about 800 MHz by YU1AW
    [ Hits: 1102 | Votes: 6 | Rating: 4.33 ]
Technical Reference : Coax Cables and Connectors
  • Using RG-174 Coaxial Cable - Notes on using RG-174 Coaxial Cable at Medium and Lower HF Frequencies by John Bryant and Bill Bowers
    [ Hits: 678 | Votes: 3 | Rating: 5.33 ]
Technical Reference : Preamplifiers
  • Garex VHF preamp - It is available for spot frequencies in the range 40 - 250MHz, where a typical gain of 26dB can be achieved
    [ Hits: 2812 | Votes: 2 | Rating: 6.00 ]
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: 13509 | Votes: 34 | Rating: 8.22 ]
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