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Antennas : 160M
  • 160m Short Vertical Loft Antenna - This is a very small vertical 160m antenna that fits in the loft of even my small house. It was built as a way of getting a signal out on 160m for local AM contacts, but the local noise level was far too high to allow it to be used at night for this purpose. However, on WSPR it did a pretty good job with WSPR spots from a very long way across Europe being received when running 2.5W out.
    [ Hits: 207 | Votes: 1 | Rating: 7 ]
Antennas : Homebrewing Techniques
  • Antenna Manufacturing: How to Prevent Galvanic Corrosion - Galvanic corrosion, a destructive process triggered by dissimilar metal contact in a corrosive electrolyte, poses a significant threat in antenna manufacturing. With aluminum and stainless steel components commonly involved, unaddressed corrosion can lead to white particle accumulation, causing long-term damage. Awareness of the galvanic series and the application of protective coatings like Alumslip can mitigate this pervasive issue, ensuring a prolonged antenna lifespan.
    [ Hits: 54 | Votes: 0 | Rating: 0 ]
Antennas : Moxon
  • Moxon Mania - Building the Ultimate 4-Band Moxon Antenna - The article details the design and construction of a four-band Moxon beam by a radio amateur. The beam, mounted atop a rooftop tower, aimed for gain over a dipole on 20 meters, cost under $500, and included additional bands. The design features fiberglass spreaders, four bands (20/15/10/6 meters), and a single feedpoint. The construction involved computer modeling, NEC source code, and specific dimensions. The article outlines the assembly, materials, and tuning process, including in-situ adjustments for optimal performance. Despite initial challenges, the beam improved signal strength and facilitated contacts on multiple bands, marking it as the best HF antenna the author has owned.
    [ Hits: 94 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • An automatically tuned 7 to 30 MHz mobile antenna - For every radio amateur who loves to travel by car, a mobile installation soon becomes a necessity. While in inhabited areas there is usually some coverage of VHF repeaters, in many other places VHF radios are useless. In these very places, HF can provide reliable contacts, and a lot of fun, from anywhere.
    [ Hits: 258 | Votes: 1 | Rating: 10 ]
  • Portable Half-Square Antenna: - The author explores a portable version of the half-square antenna, typically a single-band structure. Using a 9:1 unun for versatility, they describe construction with speaker wire, deployment using collapsible poles, and field tests, achieving successful contacts on multiple bands. The article suggests efficient matching methods and concludes with the antenna's integration into the author's portable options.
    [ Hits: 120 | Votes: 0 | Rating: 0 ]
DX Resources : DX Maps
  • EDI Visualizer - Create an on-line QSO Map of your contacts submitting a simple EDI contest log file. The EDI file must contain locators, the app will create a nice map based on google maps engine. Map will be saved online and the resulting url can be easily shared on social networks.
    [ Hits: 1201 | Votes: 2 | Rating: 5.5 ]
DX Resources : Ham Radio Awards
  • Uzice Award - The earliest known historical record of the name Uzice is found in a document in the Ragusan archives, dated October 9th, 1329. In memory of this date, October 9th is now Uzice City Day. Earlier settlements in the vicinity date back to the Neolithic times. Throughout history, this area has been at a crossroads connecting economies and cultures North-South and East-West. To this day, Uzice is an important economic, industrial and cultural center. Award is active from October 1st to October 16th each year. To win you have to collect enough points making contacts (QSOs) with amateur radio stations which base locations are in the Uzice City Area.
    [ Hits: 102 | Votes: 0 | Rating: 0 ]
DX Resources : Log Analysis
  • ADIF Processor Map QSOs with Google Earth - The ADIF Processor is an online application that visualizes amateur radio contacts from an ADIF log file using Google Earth. SOTA CSV log files can also be used. As well as allowing you to view and explore your contacts in Google Earth, you will be able to see a Markdown or text table of contacts, use the output ADIF file which contains QRZ.com data, accurate contact distances and fields populated from comments in the input file. Print QSL labels. One of the benefits of using the ADIF Processor before uploading/storing your ADIF file is detecting errors in callsigns and activity references (e.g. POTA or SOTA references).
    [ Hits: 392 | Votes: 3 | Rating: 7 ]
Ham Radio : Clubs : Europe : UK : Northern England Manufacturers : Tubes & Semiconductors
  • Greenstone USA - GREENSTONE USA leader in the Vacuum Industry manufacturing products such as Vacuum Tubes, Vacuum Capacitor, Vacuum Relays, Vacuum Contactors and Vacuum Interrupters.
    [ Hits: 233 | Votes: 2 | Rating: 9.5 ]
Operating Aids : Beginner's Guides
  • The HF Bands - For HF Newcomers - The HF ham bands can be mysterious. Some work at night, some during the day. Some seem to be good for long distance contacts while some are better for nearby contacts. Even worse, they change tremendously from hour to hour and day to day. An overview on operating on HF amateur radio bands
    [ Hits: 1771 | Votes: 5 | Rating: 9.2 ]
Propagation : MUF Indicators
  • HamDXMap - This dynamic DX Map aggregates various resources that will help radio amateurs to operate their stations in search of long distance contacts, DX. HamDXMap displays current MUF values and foF2 critical frequency values around the globe.
    [ Hits: 385 | Votes: 9 | Rating: 9.22 ]
Software : DX Cluster
  • ZCZ Cluster - Telnet client for DXCluster, Sorts, colours and filters DX Spots by (2) bands, wanted DX Station, who spotted the DX, local to your area and more, Can spot automatically after logging a contact if you are using ZCZ Log, Look up call on QRZ.com
    [ Hits: 158 | Votes: 0 | Rating: 0 ]
Software : Developer Resources
  • QSO Map Pyton Script - This project is a python program used to plot the location of QSOs (radio contacts) on Google Earth or other mapping applications. It reads an ADI file of the QSOs and creates a KML file
    [ Hits: 107 | Votes: 0 | Rating: 0 ]
Software : Log Analysis
  • ClubLog - Log Inspector - Club log, the popular online logbook service, offer an online general pourpose contacts log analysis including DXCC Charts, QSL Charts, log inspector, and many statistical reports with charts and log matching with other clublog users.
    [ Hits: 511 | Votes: 2 | Rating: 10 ]
Software : Radio Programming
  • DMR Contact Manager - DMR Contact Manager is a Free software package designed to make it easy to maintain channel, zone, contact and call group information in these radios. It is fully compatible with the Ham-Digital and RadioID database systems and allows instant codeplug updates from a wide variety of sources. DMR Contact Manager is designed for use with Connect Systems CS700/CS701/CS750/CS800/CS801/CS800D radios, as well as the Tytera MD-380/390/390GPS, TYT MD2017/MD9600, AnyTone AT-D868UV and AT-D858, Retevis RT3, and similar radios that use the RDT/RDB file formats.
    [ Hits: 353 | Votes: 2 | Rating: 9 ]
Technical Reference : Antenna Switch
  • Five Antennas Switch Box - A project of a 5 Antennas Relay Switch Box, all Switches & Relays have both contacts wired in parallel to improve reliability of operation, to prevent static build up, when an antenna is not in use the feeder coax is grounded.
    [ Hits: 1244 | Votes: 1 | Rating: 10 ]
Technical Reference : Morse Keys
  • Morse key and buzzer project for Scouts - This morse key and buzzer design only requires parts that one may already have or are easy to find on the web. There is nothing critical except that the contacts must meet when the key is depressed.
    [ Hits: 148 | Votes: 1 | Rating: 9 ]

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