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Antennas : 80M
  • Umbrella Antenna for 80 Meters - An umbrella antenna is basically just a vertical monopole antenna that is top-loaded with a large end-hat. The hat consists of a number of radial wires that slope away, downward from the top of the antenna.
    [ Hits: 925 | Votes: 0 | Rating: 0 ]
Antennas : Fan Dipole
  • Caged Fan Dipole Antenna - There are a large number of antenna designs for HF. One choice out of many is the fan dipole. The ability to transmit of multiple bands without needing a tuner (and even more with a tuner) is a very desirable factor in choosing a versitle antenna for HF.
    [ Hits: 670 | Votes: 2 | Rating: 5.5 ]
Antennas : Homebrewing Techniques
  • Wire Antenna Design Lengths - The Classic Numbers for All Types of Wire Antennas at HF. Wire antennas need to be made a bit long and cut to resonance. They are affected by height above the ground and surrounding objects. In order to get an idea of the right place to start, certain formulas are generally accepted.
    [ Hits: 327 | Votes: 1 | Rating: 7 ]
Antennas : T2FD
  • The Tilted Terminated Folded Dipole - T2FD A practical construction article, which first appeared in the Electronic DX Press, contains a number of useful photos and detailed instruction to build this antenna by VK3BVW
    [ Hits: 1180 | Votes: 3 | Rating: 4 ]
Antique Radios : Clubs
  • New York Long Island Antique & Vintage Radios Club - The Greater New York Vintage Wireless Association is the number one club serving the collector of antique and vintage radios, TVs, and electronic equipment in the New York City Long Island area.
    [ Hits: 159 | Votes: 0 | Rating: 0 ]
Ham Radio : Regional : Ukraine
  • Schemes and programmes for radio amateurs - No matter who you are, beginner or professional, you cannot do without help. For such purposes, and created websites. Website, which aims to help in some areas-engineering. There is a lot of useful diagrams and ideas for improving your summer house, the House or garage. The site has a large number of schemas, programs, online
    [ Hits: 314 | Votes: 1 | Rating: 10 ]
Operating Modes : Amateur Television
  • Beginners Guide to Amateur Television - This article is intended as a basic guide for getting started in ATV, it is also worth having a chat with one of the growing numbers of ATV enthusiasts within MKARS.
    [ Hits: 220 | Votes: 0 | Rating: 0 ]
Radio Equipment : Antenna Analyzers : MFJ-259B
  • Calibrating the MFJ-259B Antenna Analyzer - This calibration procedure is the correct procedure for later MFJ-259B's. Disregard any other information. Since MFJ-259B software has been changed under the same model number, you may find some final performance test steps not valid. These steps will involve parameters that do not appear on the display.
    [ Hits: 634 | Votes: 4 | Rating: 1.25 ]
Shortwave Radio : Numbers stations
  • Priyom Number Stations - Number stations are shortwave transmissions from foreign intelligence agencies to spies in the field of foreign countries.
    [ Hits: 278 | Votes: 0 | Rating: 0 ]
  • Numbers stations OWVL - A numbers station, also known as a one-way voice link (OWVL), is a special type of unusual radio broadcast, generally on the Short Wave (SW) radio bands
    [ Hits: 280 | Votes: 1 | Rating: 6 ]
  • Numbers Stations Classification - Article on common Classification of Spy Numbers stations.
    [ Hits: 260 | Votes: 1 | Rating: 4 ]
  • Decoding West Germany Numbers - A simplified explanation of decoding West German numbers messages transmissions without a computer.
    [ Hits: 394 | Votes: 0 | Rating: 0 ]
  • ENIGMA 2000 - ENIGMA 2000 is a UK based online group, whose aims are to bring together listeners and enthusiasts who monitor and gather information on Number Stations and other related radio transmissions.
    [ Hits: 425 | Votes: 1 | Rating: 10 ]
  • E10 Mossad Number Station - Information about the E10 mossad number station with sample sound files, comple message transcriptions and general information
    [ Hits: 301 | Votes: 0 | Rating: 0 ]
  • Spy Numbers Forum - A Web forum dedicated to HF underground and in particular to Shortwave Pirate Radio Forums and Spy Numbers listenings
    [ Hits: 328 | Votes: 0 | Rating: 0 ]
Shortwave Radio : Schedules
  • Spy numbers schedule - An updated calendar schedule of spy numbers stations in english, german, slavic, morse and digital mode
    [ Hits: 853 | Votes: 3 | Rating: 8.67 ]
Software : Decoders
  • iPhone DTMF Decoder - Decode DTMF from your iPhone. Hold your smartphone close to a DTMF source and this app will decode the numbers being dialled.
    [ Hits: 412 | Votes: 1 | Rating: 10 ]
Software : Linux
  • GQRX - GQRX is a free and simple to use SDR receiver which runs on Linux and MacOS X. GQRX comes with a standard FFT spectrum and waterfall display and a number of common filter settings
    [ Hits: 1074 | Votes: 2 | Rating: 5.5 ]
Technical Reference : Calculators
  • Capacitance Calculator - An online calculator for designing and evaluating capacitors based on the capacitor's area, separation, number, and dielectric constant
    [ Hits: 254 | Votes: 0 | Rating: 0 ]
Technical Reference : Vector Network Analyzer
  • miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
    [ Hits: 136 | Votes: 5 | Rating: 7.8 ]

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