call

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507 links - and 2 categories

Antennas : Feed Lines
  • Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
    [ Hits: 1157 | Votes: 0 | Rating: 0.00 ]
DX Resources : Callsigns
  • Italian Callbook - CallBook OnLine - this callbook includes data from over 50000 italian radio amateurs
    [ Hits: 1546 | Votes: 12 | Rating: 5.25 ]
  • Russian Callsign database - Russians Ham on-line lookup database. Search and create new callsign records. The most full russian and CIS callsign database (more 50,000 CIS records). More than 1,400,000 international calls.
    [ Hits: 2750 | Votes: 13 | Rating: 5.62 ]
Ham Radio : Clubs : Europe 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: 276 | Votes: 8 | Rating: 7.50 ]
Internet and Radio : Directories
  • K8ZT's Ham Radio Resources - K8ZT's Extensive Ham Radio Resources about QRP, Vanity Callsigns, Software, Maps, Kent State, Shack Design, Argonaut, Sommer, Log Analysis
    [ Hits: 3179 | Votes: 10 | Rating: 5.50 ]
Manufacturers : Cable and Connectors
  • Micro Coax Priority listing - Serving the defense, telecommunications and test measurement marketplace.
    [ Hits: 462 | Votes: 0 | Rating: 0.00 ]
Operating Aids : Radio Spectrum Operating Modes : Satellites
  • ESA Portal - Calling all radio amateurs Priority listing - Radio amateurs worldwide are being asked to help collect data from the student-built SSETI Express satellite, due to be placed in orbit on 27 September. To encourage them, ESA’s Education department has organised two competitions and is supplying free downloadable software.
    [ Hits: 351 | Votes: 0 | Rating: 0.00 ]
Radio Scanning : Maritime
  • Automatic Identification Systems (AIS) - Automatic identification systems (AISs) are designed to be capable of providing information about the ship to other ships and to coastal authorities automatically.
    [ Hits: 1288 | Votes: 1 | Rating: 1.00 ]
Shopping and Services : Regional : Europe : UK
  • Communication Specialists Ltd - Commercial and Private Two Way Radio Communication equipment manufactured specifically for the United Kingdom, Europe, African, Asian and the USA markets.
    [ Hits: 374 | Votes: 0 | Rating: 0.00 ]
  • BB Shopping UK Distributor of PMR 446 Priority listing - We stock a range of two way PMR446 radios. PMR 446 is a license free frequency, which means that you can communicate for up to 3km (terrain allowing) without any call charges or license requirements. They can be used in most European countries and are ideal for holiday trips.
    [ Hits: 418 | Votes: 1 | Rating: 10.00 ]
Software : Antenna analysis
  • SmartSmith - A smarter version of the Smith Chart program. It allows you to dynamically generate impedance point plots as you configure each design element of an impedance matching network. Has an extensive Help file with a Wizard that tells you what steps to take in designing a matching network for a given load impedance. Complete Windows installation kit by w9dmk
    [ Hits: 1881 | Votes: 7 | Rating: 1.43 ]
Software : Linux
  • DF9CY Project Auriga - PA is a JAVA software package containing several programs, SW/VHF/UHF Logbook (imports format from RADIOMAN, VMT), Log conversion to HTML format, Import and export functions for RADIOMAN, CT RES files, BV QSL Labels, CSV etc. Internet DX-Cluster support, Keeps track of your worked Callsigns, Checks your worked Grid Squares per band, Databases for worked Grids and Callsigns Uses K1EA CQWW.CTY country file, Easy command line version for terminal operation Moontracking as clock, Pathloss calculation
    [ Hits: 1557 | Votes: 0 | Rating: 0.00 ]
Software : Utilities
  • DDS VFO Controller - Control the NJQRP DDS Daughtercard from your PC. The DDS Controller has eight user programmable configurations. Each of the eight configurations have twenty memory cells for saving and recalling frequencies
    [ Hits: 1545 | Votes: 7 | Rating: 3.71 ]
Technical Reference : Radio Frequency Interference
  • Safety: RF awarness guidelines - Although Amateur Radio is basically a safe activity, in recent years there has been considerable discussion and concern about the possible hazards of electromagnetic radiation (EMR), including both RF energy and power frequency (50-60 Hz) electromagnetic fields. This section summarizes what is now known and offers safety precautions based on the research to date.
    [ Hits: 445 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Radio Frequency Interference : BPL
  • Broadband over power lines - PLT/PLC/BPL/DPL - it doesn't matter what you call it said one of our readers it has significant technical problems
    [ Hits: 241 | Votes: 0 | Rating: 0.00 ]
  • PLT trials in Ireland - The Irish Powerline internet trials have begun in a Town called Tuam in North Co, Galway.
    [ Hits: 226 | Votes: 1 | Rating: 10.00 ]
Technical Reference : Test Equipment
  • Rainbow Antenna Analyzer - A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings
    [ Hits: 6175 | Votes: 6 | Rating: 6.33 ]
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