rf strength

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rf strength

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Antennas : End-Fed : End Fed Half Wave Antenna

  • Comparing Mobile whip versus EF HW Vertical - PH0NO conducted field tests comparing a mobile antenna (DX-UHV) to an end-fed half-wave wire. Results on 20m showed the end-fed wire outperforming the mobile antenna, with a significant difference in signal strength. On 40m, the end-fed wire surpassed the mobile antenna in spots and reach. While the mobile antenna is more practical, the end-fed wire offers superior performance. Further testing is planned.
    [ Hits: 80 | Votes: 0 | Rating: 0 ]
Antennas : Homebrewing Techniques
  • Choosing the Right Aluminum Stock for Antenna Building - Building an efficient antenna begins with selecting the right aluminum stock. This article provides a comprehensive guide to sourcing aluminum materials for antenna construction. It covers different aluminum grades, their tensile strengths, tempering options, and their suitability for various antenna components. The article also recommends reputable suppliers in the UK, making it a valuable resource for antenna builders seeking durable and high-performance materials.
    [ Hits: 76 | 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 ]
Manufacturers : Accessories
  • LinkPlus - LinkPlus products enhance the voice quality of HF SSB amateur. Eliminates virtually all channel noise and interference and greatly strengthens SSB radio signals
    [ Hits: 963 | Votes: 2 | Rating: 5.5 ]
Operating Modes : Mobile
  • A mobile radio installation - Detailing a Yaesu FT-857 and ATAS-120 installation in a 1997 Toyota Tacoma, the author used Polar Plot to map signal strength. Using a hand truck with a laptop, FT-817, and an Iron Horse antenna, they circled a chalk-outlined 100-foot diameter, revealing potential nulls towards the truck's rear and through the cab, offering insights into antenna performance.
    [ Hits: 43 | Votes: 1 | Rating: 3 ]
Shopping and Services : Cables and Connectors
  • Davis RF - DAVIS RF Co. has been in the business of supplying the staples of wire antennas for over 30 years. DAVIS RF Co. supply all coax cables, all connectors, ladder line, rotar control cable, insulators, and we have the largest selection of wire for wire antennas. DAVIS RF Co. is the designer and trade mark holder, and primary source for Bury-Flex Tm low loss coax cable. PolyStealth Tm high strength PE insulated antenna wire, and Flex-Weave Tm wire
    [ Hits: 2476 | Votes: 11 | Rating: 7.64 ]
Technical Reference : Test Equipment : RF Probe
  • RF Probe for HF - A RF Probe circuit for the RADIO frequency experimenter to check the presence of a RF signal and also to measure its strength
    [ Hits: 669 | Votes: 0 | Rating: 0 ]
  • RF Field Strength Meter - An RF Field Strenght meter project by the Shefford & District Amateur Radio Society
    [ Hits: 815 | Votes: 6 | Rating: 6.67 ]
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