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How to build a phasing harness for stacking antennas

The performance of a small magnetic loop can be improved constructing it larger, thicker or both. The antenna is covering from 12 Megahertz to 32 megahertz and adding a 156 Pico farads ceramic capacitor it resonates on the 40 meters band. by PY1AHD

DL7JV Christian report his direct experience on magnetic antennas

80 to 6 meters, 2 KW, designed to be used at heights of only 25 to 45 feet, includes a twenty foot long vertical radiator

An interesting article on how to make copper cactus J-Pole antennas

A three band short Vee antenna is feasible with two legs per side on a dipole. 10-15-20 meters by W8HDU

Isolation vs antenna separation an interesting article by WA6ILQ

A VHF UHF handheld antenna suitable for satellite operation by LY3H include antenna plan with dimensions and pictures.

A short multi-band vertical antenna

A 4-Band vertical antenna that needs NO tuner, NO traps. Implement an LC matched on 4 bands with relay switching.

EF0603S is a 3 element portable yagi antenna for six meters band by YU7EF

Personal Blog devoted to ham radio topics,homebrew,antenna,satellite and other projects

Dish antenna and its theory and design for high performance applications such as satellite transmission and reception as well as microwave links. Parabolic Reflector Antenna: Dish Antenna The parabolic reflector antenna which is often called the dish antenna provides an antenna solution applicable for VHF and above where high gain and directivity are needed for all type of radio communications and radio reception.

Specialist in the design and supply of Radio Communications Equipment and Systems. West Sussex England. Antennas, traps and baluns inline isolators, Outbacker Antennas, Mobile Mounts and Accessories

The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators.

Phased wire vertical antennas for 40 meters band

Homebrew project of a windom antenna, an off center fed dipole, resonating from 10 to 80 meters

A 144 Mhz Slim Jim Antenna, aluminum tubing version project by Mohammad 9W2WTF

Ground Plane - 1/4 wave vertical, J-Pole, 3 Element Yagi Beam and simple antenna supports

Dragoslav Dobricic, YU1AW antennex article on influence of Boom on frequency performance and how compensate it

The X80 multi-band HF vertical antenna, a commercial iteration of the Rybakov design, exhibits a physical length of 5.5 meters, or approximately 18 feet, and is constructed from aluminum tubing. It operates as a non-resonant vertical, requiring an external antenna tuner for impedance matching across its intended operating frequencies. The antenna's design incorporates a 1:4 UNUN at its base, facilitating a nominal 50-ohm feed point impedance for the coaxial cable. Performance observations indicate effective operation on 40 meters, 20 meters, 15 meters, and 10 meters, with reduced efficiency on 80 meters and 160 meters due to its relatively short electrical length for these lower bands. Comparative analysis with a G5RV dipole and a half-wave end-fed antenna reveals the X80 offers a lower take-off angle, beneficial for DX contacts, particularly on the higher HF bands. Field tests conducted with an Icom IC-706MKIIG transceiver and an LDG AT-100ProII autotuner demonstrate the X80's ability to achieve acceptable SWR across 80m through 10m. The antenna's compact footprint and ease of deployment make it suitable for restricted spaces or portable operations, though its performance on 80 meters is noted as a compromise compared to full-size resonant antennas.

Fabricates baseplate components, and provides hardware kits for DIY hex beam, spiderbeam and moxon antennas.

A really simple LF receiving loop antenna

An homebrew Lindenblad antenna designed specifically for LEOs reception.

A spiral antenna experiment for RTL SDR usage.

Quarter wave omni-directional spider antenna for 2.4GHz 802.11b

6 Meter 1/4 Wave Antenna by Mike Fedler N6TWW. A detailed article with pictures of construction details of this 50 Mhz antenna

A simple antenna analyser for the HF spectrum with a built-in signal generator with 3-digit LED frequency display.

The Double Bazooka Dipole is a very efficient single band antenna which is very quite,and does not require the use of a balun. This antenna consists of coax (RG58) with the shield split at the center and the feedline attached to the open ends.

A comparison of multiband dipoles, including jumpered dipole versus fan dipole antennas, dipole fed by ladder line, resonant dipoles antennas. ARRL lab notes

The ZS6BKW multi-band antenna, an optimized variant of the classic G5RV, is presented with detailed construction and tuning instructions. This resource outlines the antenna's design principles, which were developed by _Brian Austin (G0GSF)_ using computer programs and Smith charts to achieve optimal dimensions. It provides specific guidance on calculating and adjusting the lengths of the radiators (L1) and the matching ladder line (L2), emphasizing the critical role of velocity factor (VF) in achieving resonance. The article includes a step-by-step procedure for empirically determining the VF of ladder line using an antenna analyzer, ensuring accurate physical lengths for the matching section. It details the tuning process for the radiators, offering practical tips for incremental adjustments to achieve the best SWR curve. The resource presents SWR measurement results obtained with an _AIM-4170C_ analyzer across multiple bands, alongside predicted SWR graphs from an AutoEZ model. It confirms successful contacts on 80, 40, 20, and 17 meters, including a **17-meter DX contact** to Italy. EZNEC and AutoEZ models for the ZS6BKW antenna, covering 80 through 6 meters, are provided for download, allowing further analysis and customization. The document specifies component details, such as the use of Wireman 554 ladder line and #14 AWG THHN copper wire, and discusses the antenna's performance characteristics, noting high SWR on 15 and 30 meters but successful tuning on 6 and 80 meters with an external tuner.

A vertical antenna for Six Meters band

A compact 2 element W8JK beam antenna for 20M to 10M bands by AF6SA

Sleeve baluns are normally used at VHF and higher. As a general rule, they are not practical at HF. The balun can be inverted and used as a skirt to form part of the antenna element

Comments received from QRP-L members concerning their experiences with GAP antennas.

Windows Magnetic Loop antenna design software by DG0KW in Detusch

A project for a 50 MHz moxon rectangle antenna

A dipole antenna for 7 MHz support for this antenna is fiberglass military mast

Extend the range of wireless network or connect to other wireless networks in neighborhood with your own wifi antenna.

In this PDF article Zack Lau describe how to homebrew a four element yagi beam antenna for 50 MHz band, including how to build mounting blocks and tubing clamps to hold elements.

A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN

Mounting on Roof or at Ground Level? Why ground plane antenna works better at lower level.

An article at NFARL web site about differences in setting up a half-square antenna versus a Loop Skywire by W4QO

Article by VU2GT about VHF antennas, how to evaluate performances and models.

A Compact and efficient multiband beam antenna based on a Modified W8JK Array by K5LJ

Chart showing how SWR effects how much power you actually radiate from your antenna.

The antenna described here is a direct-connect dual-rectangle beam for use on 70 cm between 440 and 450 MHz

Manufacturing distributor of infrastructure products for the telecommunications industry; antenna mounts, ice bridge, cable ladder, ground bars, weatherproofing, exothermic, safety equipment.

Website for radio Amateurs in the Hastings, Peterborough, and Northumberland Counties of East Central Ontario, Canada. Propagation information as well as antenna designs and home brew projects and Club News. Many links to Amateur Radio information

The GM4JJJ VHF and EME pages document David's extensive work in Earth-Moon-Earth (EME) communication, specifically on the 144 MHz band, and his involvement in amateur radio astronomy. The resource details his station setup and operational experiences, providing insights into the technical challenges and rewards of bouncing signals off the moon. It offers a glimpse into the specialized equipment and techniques required for successful EME contacts, a niche but highly rewarding aspect of amateur radio. David's content shares practical applications and field results from his EME endeavors, which can be particularly useful for hams contemplating or actively pursuing moonbounce operations. The information, while not a step-by-step guide, implicitly compares the complexities of EME with more conventional VHF/UHF operations, highlighting the significant power and antenna gain necessary to overcome path losses. This resource serves as a testament to the advanced capabilities achievable in amateur radio.