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195 links - and 3 categories

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: 10977 | Votes: 8 | Rating: 3.87 ]
Antennas : Baluns
  • Balun measuements - Why can't you find the specifications for the baluns on the market? The only specifications you'll see are the ratio, the power rating and a bandwidth that is more hoped for than reality.
    [ Hits: 2548 | Votes: 3 | Rating: 4 ]
Antennas : Theory : Antenna Gain
  • G/T Simulations - by VE7BQH - Here you will find information on how antennas behave when stacked G/T is an important figure-of-merit for the antenna's overall receive performance, because it balances forward gain (G) against received thermal noise (T).
    [ Hits: 759 | Votes: 8 | Rating: 7.87 ]
Antennas : Traps
  • Homebrew your own inductors  updated  pop - Cannot find the inductors you need for an antenna, a tuner or amplifier ? Build your own it is easy!
    [ Hits: 27323 | Votes: 19 | Rating: 7.11 ]
Antennas : Wire
  • Installing Wire Antennas - Before selecting an antenna system, you must first find a place to put it. A selection of techniques to setup antennas upon trees using pulleys or other tools
    [ Hits: 2027 | Votes: 1 | Rating: 10 ]
DX Resources : QSL manager
  • eHam QSL manager Finder - An online database of QSL managers at eHam maintained by K4WA
    [ Hits: 477 | Votes: 0 | Rating: 0 ]
Manufacturers : Power Supply
  • National RF, Inc. - National rf provides consulting engineer services, and manufactures direction finding antennas, test equipment, communications receiving equipment and adjuncts, satellite antennas, voice amplification and audio equipment.
    [ Hits: 704 | Votes: 0 | Rating: 0 ]
Operating Aids : Beginner's Guides
  • Ham Radio communications can be fun ! - Ham radio activities, from satellite operations, eme communications, dxing and contesting, qsling and direction findings, are just some of ham radio exciting activities
    [ Hits: 595 | Votes: 0 | Rating: 0 ]
Operating Modes : APRS
  • APRS in Tokyo - APRS stations in the Tokyo region tracking database from FindU.com
    [ Hits: 490 | Votes: 0 | Rating: 0 ]
Operating Modes : Meteors
  • F5VLB amateur radio astronomy station - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.
    [ Hits: 1457 | Votes: 3 | Rating: 10 ]
Operating Modes : Radio Direction Finding
  • Thunt.org : transmitter hunting - Amateur radio direction finding, transmitter hunting web site from San Francisco. Triangulating a radio signal direction and plotting its bearing on a map. Hunters use doppler systems for tracking hidden transmitters anywhere in the san francisco bay area, fremont california
    [ Hits: 838 | Votes: 2 | Rating: 7.5 ]
  • Far circuits - Direction finding projects, useful tools for t-hunting operations
    [ Hits: 1242 | Votes: 1 | Rating: 10 ]
Operating Modes : Radio Direction Finding : Clubs
  • Transmitter hunting, in San Francisco - Amateur radio direction finding, transmitter hunting. triangulating a radio signal direction and plotting its bearing on a map. hunters use doppler systems for tracking hidden transmitters
    [ Hits: 388 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-1000MP
  • IF-MOD for Yaesu FT-1000MP - In this page you can find some pics of the mods that you can make to the FT-1000MP/Mark V
    [ Hits: 1718 | Votes: 1 | Rating: 8 ]
Shopping and Services : Regional : Europe : Italy
  • Grandicelli - Hf-vhf-uhf-shf-digital-monitoring-site,wavecom Decoder and tools, winradio and DRM decoders, WD3000 Direction Finding System , radioraft software. PFSL3000 Integrated HF-VHF-UHF signal monitorin
    [ Hits: 702 | Votes: 0 | Rating: 0 ]
Software : APRS
  • Win APRS - Automatic Position Reporting System windows program, allow monitoring of real time geographical information such as the position of vehicles, the status of weather, radio direction finding and more.
    [ Hits: 17632 | Votes: 21 | Rating: 5 ]
Software : Databases
  • PreFind - A Free Prefix, DXCC and Locator program for Windows
    [ Hits: 941 | Votes: 1 | Rating: 10 ]
Technical Reference : Components : Component Database
  • DigChip IC database - Provider of electronic components documentation. Offer a reliable tool to find semiconductors components technical information like parts, datasheets, cross reference, obsolete and new circuits.
    [ Hits: 517 | Votes: 6 | Rating: 4.17 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • QRM and noise reduction - 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: 4841 | Votes: 6 | Rating: 7 ]
Technical Reference : Sound Card Radio Interfacing
  • FT-1000MP interface - YAESU FT-1000/MP/MARK V (filed) interface, this one of numerous RTX sound blaster interfaces you can find on the internet, but this one include: FSK KEYING to use with the RTTY port, DVS-2 to use the interface in AFSK mode, this include all digital modes + voice keyer, CW KEYING
    [ Hits: 6574 | Votes: 1 | Rating: 10 ]

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