3d antenna

3d antenna

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• 6el LFA Yagi for 50MHz - This six element LFA Yagi for six meters has a 1.5 inch square boom with a 1.5 inch secondary boom beneath the first. This ensures the 7.3 metre long boom will not sag and will not require any guying. This antenna has 12.3 dBi Gain and just over 23dB F/B.
  [ Hits: 117 | Votes: 2 | Rating: 4 ]

• Mini Whip - Active HF Antenna  ^new - The author investigated electric field antennas and achieved promising results with a shortened active whip antenna (30 cm). The findings suggest that at LF, active whips function primarily through electric field capacitance coupling.
  [ Hits: 58 | Votes: 1 | Rating: 10 ]

• End Fed Antenna for WARC Bands - I used a FT 240-43 for much more power, not needed but beter safe than sorry. 150 Watt continious, 300 Watt PEP SSB, 90 Watt Digimodes 10 Mhz, 18 Mhz, 24 Mhz Very easy to build design and a good antenna for people who don't have much space for big towers or long wires This design is from Hans - PE1RNU
  [ Hits: 187 | Votes: 1 | Rating: 3 ]
• TEFV Terminated End Fed Vee Antenna - The Terminated End Fed Vee Antenna (TEFV) is a travelling wave antenna with constant current distribution. Unlike traditional resonant antennas, TEFV operates without standing waves, using a terminating resistor for broadband efficiency. With a combination of vertical and horizontal polarization, it offers wide bandwidth from 1.8 MHz to 30 MHz, eliminating the need for a tuner. Key components include a 9:1 unun transformer and a 500-ohm terminating resistor. Grounding and counterpoise enhance performance, and it can handle power losses of up to 30%. TEFV provides an effective, versatile antenna solution for amateur radio and broadcast applications.
  [ Hits: 187 | Votes: 2 | Rating: 6.5 ]
• 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 ]

• 1:49 unun for end fed half wave antennas - 1:49 UNUN using two stacked FT240-43 cores for end fed halfwave antenna. To match the end fed half wave antenna to the coaxial feeder, it is necessary to have a matching network or transmission line transformer.
  [ Hits: 398 | Votes: 10 | Rating: 8.1 ]

• RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
  [ Hits: 86 | Votes: 0 | Rating: 0 ]

• Antennas for HOAs and Apartments - This presentation applies to HF / VHF / UHF antennas and is about 14 different type of antennas suitable for indoor od apartament installations
  [ Hits: 187 | Votes: 0 | Rating: 0 ]

• Build the K1FM-Loop - The latest version of the K1FM-Loop is electrically similar to the previous one, but it is designed around off-the-shelf parts or, more generically, items you can readily order online. This antenna relies heavily on 3D printing.
  [ Hits: 102 | Votes: 0 | Rating: 0 ]

• KD5RVX MicroVert Antenna - A Microvert antenna by KD5RVX based on the original microvert concept by DL7PE. PDF includes a 20 foot portable PVC tower project
  [ Hits: 454 | Votes: 0 | Rating: 0 ]

• W3DZZ Multiband Antenna - An easy to build and extremely high performance antenna, works perfectly on all HF bands 3.5-28 MHz with some compromises, it is basically an half wave dipole for 40-80 meters, an LC circuit or trap 40 meters allows you to use a single radiating element.
  [ Hits: 464 | Votes: 3 | Rating: 7.67 ]
• Build a W3DZZ Antenna - The purpose of this construction is to enable the realization of an HF antenna called W3DZZ with minimal equipment and low cost. It allows traffic on the bands 3.5 / 7/14/21 and 28MHz.
  [ Hits: 219 | Votes: 1 | Rating: 1 ]

• NEC-Win Plus+ - Developed for beginners, hobbyists, and field engineers. Includes polar plots, rectangular plots for input impedance and VSWR, tabular data, NEC-Win Synth Light and Necvu 3D. Includes NEC2. The program also offers stepped-diameter corrections, Gain Averaging Test, CAD (.DXF) file input, 2-D and 3-D plots and antenna views, and graphical outputs. Run on older Windows version and is out of support.
  [ Hits: 314 | Votes: 2 | Rating: 4.5 ]

• 3D Ham Radio Antenna models Thingiverse - Ham Radio 3D Models published on Thingiverse, includes several parts for homebrewing amateur radio antennas, like spreaders, isolators a and mounts, wire antenna winders, adapters and many other accessories useful to antenna homebrewers.
  [ Hits: 345 | Votes: 1 | Rating: 10 ]
• 3D Printed Accessories for the FT-817 and KX2 - DC plug adaptor using an XT60 connector. 18650 Lithium battery 3 cell carrier, Three band end fed half wave antenna, XT60 chassis mounted flange.
  [ Hits: 185 | Votes: 0 | Rating: 0 ]
• 3D Printer Makes Ham Antenna Portable - An end fed antenna winder design that also contains the necessary matching toroid. This would be just the thing to throw in your backpack for portable operation.
  [ Hits: 217 | Votes: 0 | Rating: 0 ]

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