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179 links about lf radio on dxzone.com

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Antennas : 40M
  • 40-80 Half-Extended Double Zepp Antenna - A dual-bander for 80M and 40m. An Extended Double Zepp (EDZ) is a 5/4 wavelength center-fed dipole. This article will introduce the Half-Extended Double Zepp (HEDZ) which has characteristics that a lot of amateur radio operators should find quite interesting
    [ Hits: 9704 | Votes: 6 | Rating: 3.33 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End-Fed Halfwave Antenna - The end-fed halfwave antenna is a resonant half wavelength long antenna like a dipole antenna except for it is fed at its end rather then in the center. This antenna is as old as radio and is probably best known as the Zepp Antenna
    [ Hits: 22284 | Votes: 14 | Rating: 7.85 ]
Antennas : Magnetic Loop
  • Active Loop Converter for LF - Active Loop Converter for the LF Band by Lloyd Butler VK5BR originally published in Amateur Radio, July 2000)
    [ Hits: 1550 | Votes: 0 | Rating: 0.00 ]
  • 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: 1653 | Votes: 0 | Rating: 0.00 ]
Antennas : Mobile
  • A $20 HF mobile antenna - A few hours of fun with PVC and wire and you’ve got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.
    [ Hits: 8833 | Votes: 5 | Rating: 6.80 ]
Antennas : Shortwave
  • An easy loop for VLF - An easy VLF loop, 200Hz-20kHz reception without transformers by Renato Romero and Marco Bruno
    [ Hits: 6285 | Votes: 5 | Rating: 4.60 ]
Antennas : WiFi Antennas : Wire
  • Half square antenna - The elevated half square antenna is a very simple antenna that can be constructed from common materials yet gives significant improvement over a dipole at the same elevation. Ground mounted versions of this antenna are commonly used in amateur radio for 75/80 and 160 meter bands
    [ Hits: 6848 | Votes: 3 | Rating: 7.67 ]
Ham Radio : Clubs : North America : USA : North Carolina
  • Robeson County Amateur Radio Society - RCARS has been formed to be a non-profit corporation dedicated to the safety and welfare of the citizens of Robeson County in times of emergency, disaster or other communications breakdown or overload.
    [ Hits: 141 | Votes: 0 | Rating: 0.00 ]
Ham Radio : Personal Pages
  • VU2LFA ham radio in india - This site is basically for the begeners (SWL) of india. This site is supporting to digital communication for hams also.
    [ Hits: 244 | Votes: 8 | Rating: 7.50 ]
Ham Radio : Personal Pages : Europe
  • SM5IQ Alf - "Ham" Radio, History of Amateur Radio Direction Finding (ARDF) in Sweden, Genealogy, Nostalgia. In English and Swedish
    [ Hits: 214 | Votes: 1 | Rating: 9.00 ]
Manufacturers : Antenna Rotators
  • Alfa Radio Ltd. - Makers of the AlfaSpid RAS and RAK Rotators
    [ Hits: 2543 | Votes: 8 | Rating: 6.25 ]
Manufacturers : Towers and Accessories
  • AN Wireless Tower Company - AN Wireless is a manufacturer and distributor of Self Supporting Tower Systems for Wireless Communications, Wireless Internet, Wireless Networking, Microwave, Paging, Broadcast, Two-Way Radio and Amateur Radio.
    [ Hits: 1591 | Votes: 3 | Rating: 7.67 ]
Propagation : Propagation Forecast Propagation : Resources 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: 11899 | Votes: 59 | Rating: 6.00 ]
Shopping and Services : Radio Equipment Repair
  • MTS Ham Radio Repair - Radio / electronics repair ICOM authorized service center
    [ Hits: 1699 | Votes: 4 | Rating: 10.00 ]
Shortwave Radio : Broadcasters : Clandestine Radios Shortwave Radio : Broadcasters : Pirate Radio
  • Alfa Lima International - A free radio station that is transmitting world wide on several shortwave frequency 's with loads of pirate and freeradio information.
    [ Hits: 903 | Votes: 1 | Rating: 9.00 ]
Shortwave Radio : Schedules Software : Audio Recorders
  • WEaudio recorder - WEaudio was born as a program to record activity on VLF band, it can records audio file on HD as long as you want within prefixed pauses. It can starts record at the hour you want to monitor.
    [ Hits: 2169 | Votes: 1 | Rating: 9.00 ]
Software : Radio Programming
  • Control Freq Jr v2.0 - Control Freq Jr v2.0 is a software tool for the Uniden BC250D and BC785D to assist in programming these complex scanner radios.
    [ Hits: 960 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Electronics
  • 10 Amp 13.8 Volt Power Supply - Sometimes amateurs like to home-brew their power supplies instead of purchasing one off the shelf at any of the major ham radio retail dealers.
    [ Hits: 1661 | Votes: 3 | Rating: 9.67 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • QRM and noise reduction Priority listing - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
    [ Hits: 4127 | Votes: 5 | Rating: 8.20 ]
Technical Reference : Software Defined Radio
  • Wavefront CompactPCI (CPCI) RF converter - The Wavefront CompactPCI (CPCI) RF converter provides a complete half-duplex radio front-end in an industry-standard 6U format. The architecture consists of dedicated receive and transmit channels that share a common RF interface.
    [ Hits: 745 | Votes: 0 | Rating: 0.00 ]
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