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Antennas : 160M- Magnetic Monster Loop Antenna for 160m
- A monster magnetic loop antenna for 160 meters band. This Magnetic loop is optimized for 1840 Khz + 50 Khz. PDF Article published on La Radiospecola 10.22
[ Hits: 836 | Votes: 2 | Rating: 10 ]
- A Simple High-Performance Vertical Antenna
- This article describes the details of the design, which can be easily scaled for just about any HF band. The antenna described in this article is for the 20 meters band.
[ Hits: 660 | Votes: 3 | Rating: 9.67 ]
- Half-Size 6 meter J-antenna
- How to use a little known J-antenna characteristic to reduce a conventional 14 foot antenna to 7 feet. Perfect 50 Ohm match, same gain, no radials.
[ Hits: 61 | Votes: 0 | Rating: 0 ]
- A 6m beam for portable operations
- A project for a six meters Yagi beam antenna, built mainly for portable operations. This is a 4 element Yagi beam with a 4 meters boom.
[ Hits: 76 | Votes: 0 | Rating: 0 ]
- The Pop-Up Vertical 2.0
- Basically, this antenna is a 23-foot wire fed through a 4:1 un-un transformer. This antenna can be easily used in portable operation, for operating all bands from 40-10 meters.
[ Hits: 253 | Votes: 0 | Rating: 0 ]
- 2 meter Magnetic Loop Antenna
- VHF Antenna in a Lunchbox, The Magnetic Loop on Two Metres. The two metre magnetic loop is a compact antenna which can easily be hung up under the eaves, the carport, or any other place where space is limited including indoors
[ Hits: 515 | Votes: 1 | Rating: 1 ]
- Magnetic Loop for 20 meters band
- A magnetic loop antenna designed for 14 MHz.
This kind of antennas is also known as STL, small transmitting loop and can be an excellent solution when you are not allowed to put antennas on your roof
[ Hits: 204 | Votes: 0 | Rating: 0 ]
- Multi-Band 4 Foot Magnetic Loop with Gamma Match
- This antenna works on 17, 20, and 30 meters, with the best bandwidth on 20 meters. The bandwidth on 17 and 30 is quite small but usable. There is a 20 KHz bandwidth on 20 meters.
[ Hits: 136 | Votes: 2 | Rating: 10 ]
- Loop magnetic antenna for 80-160 meters band
- Jeri Ellsworthhas started a video series devoted to building a magnetic loop antenna for the 160- and 80-meter bands. The first video, included after the break, is an overview of the rationale behind a magnetic loop
[ Hits: 174 | Votes: 0 | Rating: 0 ]
- K1FM Mini Magnetic Loop
- Original HF magnetic loop antenna designed by the author to work in conjunction with QRP transceivers like the FT-817 in portable operations. In this configuration the loop can operate from 30 to 10 meters. Using a two spires radiator of the same diameter it also covers 40 meters.
[ Hits: 116 | Votes: 1 | Rating: 8 ]
- 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 ]
- Modified Ground Plane Antenna Adds Second Band
- This article explains the trick of how to shorten and lengthen pairs of radials to make a 2-band ground plane antenna.
Included is a "Table of Multi-Band Possibilities" covering the range of 6 to 40 meters.
[ Hits: 53 | Votes: 0 | Rating: 0 ]
- DIY Yagi Antenna
- This article describes the phases for the construction of a Yagi antenna. The calculations of the parameters are made using 4NEC2 software. This type of antenna is used for transmissions and receptions of electromagnetic waves. The project shown here refers to the frequency of 433.92 MHz.
[ Hits: 107 | Votes: 4 | Rating: 3.5 ]
- WebSDR from Croatia
- WebSDR receiver located near Krizevci, Croatia with 0-2 MHz, 60-80 meters band and 40-49 meters band
[ Hits: 171 | Votes: 2 | Rating: 8.5 ]
- W6LVP Loop Antennas
- Magnetic loop receive antennas manufacturer. W6LVP loops cover 2200 through 10 meters (135 kHz through 30 MHz) with no tuning or adjustment.
[ Hits: 144 | Votes: 1 | Rating: 4 ]
- Propagation on 630 Meters and 2200 Meters
- This is a theoretical look at propagation on 630-Meters and 2200-Meters using ray tracing software. It expands on the brief discussion in the ARRL Handbooks.
The Earth's magnetic field affects 630-Meter and 2200-Meter band propagation. Lower ionization reduces absorption, aiding low-frequency propagation. Differences exist between bands, limited daytime sky-wave propagation. Sunrise/sunset show promise, yet mechanisms are unclear. Ducting possible at night in specific conditions. Negative ions enhance propagation. Inefficient antennas and high man-made noise are anticipated. Groundwave propagation is significant on 2200-Meters.
[ Hits: 36 | Votes: 1 | Rating: 10 ]
- ICOM IC-R75 Review by N9EWO
- Icom IC-R75 tabletop HF communications receiver came onto the market back in 1999 and was taken out of production in late 2015. Frequency coverage is from 30 hz right to 60 MHz. This allows one to catch the 6 Meter amateur band as well.
[ Hits: 44 | Votes: 0 | Rating: 0 ]
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