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• 160M antenna for small lots or gardens - Small & practical DIY inverted U antenna. This design worked very well during the 2017 CQWW 160M SSB contest.
  [ Hits: 1700 | Votes: 5 | Rating: 4.2 ]

• Guanella 4:1 balun - This article reviews the proposition that a 4:1 current balun in the style of Guanella can be constructed with both pairs of windings sharing a common magnetic circuit.
  [ Hits: 3113 | Votes: 2 | Rating: 5.5 ]

• Fritzel Antenna maintenance - Article on maintenance of a FRITZEL antenna by cleaning and restoring antenna traps, baluns and elements.
  [ Hits: 1746 | Votes: 7 | Rating: 6.75 ]

• Antenna Efficiency - K0BG article con antenna efficiency covering topics like radiation resistance, coil losses and ground losses, other kind of losses. How calculate efficiency and Bandwidth Notes
  [ Hits: 458 | Votes: 0 | Rating: 0 ]
• Large Antenna in a fixed direction? - If your antenna is fixed in one direction, you will notice that your antenna works perfectly only during fall and spring.
  [ Hits: 333 | Votes: 0 | Rating: 0 ]

• Ham Radio - Amateur Radio Fascinating Secrets - Ham radio or amateur radio has fascinated generations. This Web site reveals the secrets behind its enduring popularity and usefulness.
  [ Hits: 539 | Votes: 1 | Rating: 10 ]

• LZ Antenna - LZ Antennas LTD is specializing in manufacturing antennas HF multiband Yagi and vertical antennas. LZAntenna is based in Bulgaria
  [ Hits: 1935 | Votes: 12 | Rating: 7.42 ]

• Radio Bygoned - From the Publishers of EPE, this specialist niche publication is of interest to vintage radio enthusiasts, offering step-by-step rebuilds of selected receivers and helpful ideas and advice. Published every other month, each issue contains articles on radio restoration and repairs, histories, circuit diagrams, nostalgic memories and adverts by specialists.
  [ Hits: 809 | Votes: 0 | Rating: 0 ]

• Meteor scatter or meteor burst communications - A summary, overview or tutorial covering the basics of Meteor Scatter or Meteor Burst Communications, a form of radio signal propagation often used at VHF.
  [ Hits: 449 | Votes: 0 | Rating: 0 ]

• Iambic Keying - Iambic Keying, Debunking the Myth by Marshall G. Emm, N1FN. A keying system controls transmitter activation, ranging from basic switches to electronic keyers that generate Morse code based on paddle input. Iambic keyers, introduced in the late 1950s, respond to simultaneous paddle closures with alternating dots and dashes. Despite touted efficiency, actual benefits are modest, offering about a 5% improvement in keystrokes, diminishing at higher speeds. Iambic keying's practical value is limited and may restrict sending speeds.
  [ Hits: 627 | Votes: 0 | Rating: 0 ]

• Radiowave Propagation Center - High frequecy and VHF radio propagation data, solar and geomagnetic real-time and historic data, sunspot activity reports, as well as forecasts. A comprehensive propagation resource compiled by Tomas Hood, editor of the propagation columns of CQ, CQ VHF, Popular Communications, and Monitoring Times magazines.
  [ Hits: 444 | Votes: 1 | Rating: 10 ]

• Restoring A Drake TR-7 To Full Output Power - By Floyd Sense K8AC
  [ Hits: 522 | Votes: 0 | Rating: 0 ]

• Using FT-2000 in Contest by IK4AUY - Article by Sergio IK4AUY about the yaesu FT-2000 used during CQWW DX SSB contest. Performance reports and comparison with other transceivers
  [ Hits: 818 | Votes: 0 | Rating: 0 ]

• Yaesu FT-857 Jumpers - Schematic of Yaesu FT-857 main board original jumpers based on different radio type
  [ Hits: 1292 | Votes: 1 | Rating: 1 ]

• Cluster Client - A Windows freeware DX cluster client, allows you to monitor DX spots from users worldwide includes DX filtering and statical functions.
  [ Hits: 2550 | Votes: 8 | Rating: 4.75 ]

• Cables - A basic article on audio cables, electrical wiring, cable lenght, data cables.
  [ Hits: 382 | Votes: 0 | Rating: 0 ]

• Measuring Inductances with a Freqeuency Counter - This article also shows how you can make your own measurements that are as good as those possible with professional equipment
  [ Hits: 738 | Votes: 3 | Rating: 2.67 ]

• A PIC16F84 based CW Decoder - CW decoder project that automatically adapts itself to the CW rate and may be employed for learning purpose substituting the traditional tone generator and offering the capability of displaying the keyed code.
  [ Hits: 2432 | Votes: 11 | Rating: 8.08 ]

• XPhase - Interference reduction - The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna. When the phase-shift is more or less 180°, the interfering signal is canceled out.
  [ Hits: 733 | Votes: 0 | Rating: 0 ]

• What Does Your SWR Cost You ? - Wondering whether to spend a fine day with the YL or with the antenna? This article may help you decide by W1GV
  [ Hits: 686 | Votes: 0 | Rating: 0 ]

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