10 meter mod

10 meter mod

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• Vertical dipole antenna - A vertical dipole for 10, 15, 20 and 40 meters made adapting two Hustler Model 6-BTV antennas by w6sdo
  [ Hits: 2238 | Votes: 9 | Rating: 6.56 ]

• Multi-Band End-Fed Antenna Design for Limited Space  ^new - This document details the construction of a multi-band end-fed antenna, suitable for situations with limited space for larger antennas. The design utilizes a 1:49 to 1:60 impedance transformer to match a half-wave wire antenna fed at one end. Compared to a traditional dipole, this antenna resembles a highly unbalanced Windom antenna with one very long leg and a virtual short leg. The design eliminates the need for radials but relies on the coax cable shield for grounding. The document recommends using at least 10 meters of coax and installing a common mode filter at the entry point to the shack for improved performance.
  [ Hits: 76 | Votes: 0 | Rating: 0 ]

• The KL3JM modified SRI Fan Dipole for 80-40-20 Meters - The antenna in this project is a modification of the techniques used to design a multiband fan type dipole with little or no tuning involved having a total space of 105 feet
  [ Hits: 502 | Votes: 1 | Rating: 5 ]
• 6 Bands Fan Dipole Antenna - Extension to an existing fan dipole originally modeled for 40 20 and 6 meters. This modification will add 80 15 and 10 meter bands.
  [ Hits: 1299 | Votes: 2 | Rating: 5 ]

• Chokes and Temperature changes - The influence of temperature changes in Common Mode Chokes. To get an indication of the impedance behavior when the core temperature changes, the author tested a CMC by heating it with a hairdryer, and measuring its temperature with an infrared thermometer. When the CMC temperature rises from 30C to 90C, the frequency of maximal impedance shifts down from ca.10 MHz to ca.7.2 MHz, or by a factor 1.4.
  [ Hits: 46 | Votes: 0 | Rating: 0 ]

• 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: 96 | Votes: 0 | Rating: 0 ]

• 5 Band Quad Antenna - A 5 band two element quad antenna working from 20 to 10 meters using hardware-store parts or modifying an existing commercial triband quad by KC6T
  [ Hits: 1329 | Votes: 2 | Rating: 7.5 ]
• 2 Meter 5 Element Quad - A five element quad antenna for 144 MHz DIY Project. This 2 Meter 5 Element Quad antenna was modeled using EZNEC, with a boom from a UHF TV antenna and CPVC pipe for spreaders. Constructed for 146MHz, it exhibits a gain of 10.7dB and an impedance of 75 ohms. Real-world results surpass the HT antenna, reaching over 20 repeaters up to 75 miles away. The design, costing around $10, employs simple tools for assembly.
  [ Hits: 1889 | Votes: 9 | Rating: 6.23 ]

• World Wide Digi DX Contest - World Wide Digi DX Contest 2019 The contest will occur over 24 hours on August 31 and September 1, 2019 using the FT4 and FT8 modes on the 160, 80, 40, 20, 15, and 10-meter bands.
  [ Hits: 156 | Votes: 0 | Rating: 0 ]
• Narrow FM Contest 2020 - The ARI Club of Lecce (Italy) is proud to present the first HF FM contest. This is the NARROW FM CONTEST which will debut the 6th and 7th of June 2020. It will last 24 hours and will take place on 10 meters exclusively in the FM emission mode.
  [ Hits: 82 | Votes: 8 | Rating: 8.63 ]

• Icom PW-1 band expansion mod - Enabling 10 and 12 meters band modification. This document explain how to do the modification to the PW1 in detail, with the aid of pictures & text
  [ Hits: 853 | Votes: 1 | Rating: 8 ]

• FL2100 - 12 meter band mod - Adding a full power output 12 meter band capability to the Yaesu FL-2100 despite of 10 meter.
  [ Hits: 547 | Votes: 1 | Rating: 1 ]

• Transmission Line Details - This utility program shows the impedance and reflection coefficient parameters (SWR, reflection coefficient magnitude Rho, or Return Loss RL in dB) at both ends of a transmission line and the details of power loss in the line. It includes built-in specifications for approximately 100 different line types. You can modify the specs to see how small changes affect the results or to specify custom lines. All program inputs may be changed directly or you can use spin buttons to make the changes.
  [ Hits: 128 | Votes: 0 | Rating: 0 ]

• Digital SWR and Power Meter - This module is an analogue and digital SWR and power meter/monitor, designed to replace analogue SWR and power metering in an AM Transmitter project.
  [ Hits: 268 | Votes: 0 | Rating: 0 ]

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