4m dipole
15 links
Antennas : 20M : 20 meter Dipole Antennas
- Homemade 20 metre band Loft Dipole
- An homebrewed dipole antenna for 14MHz
[ Hits: 3078 | Votes: 3 | Rating: 3.67 ]
- 14MHz Inverted Vee Dipole
- Inverted vee dipole antenna for 20 meters band by VK1OD
[ Hits: 6448 | Votes: 13 | Rating: 2.39 ]
- 4m Tall Vertical Dipole for 20m
- Constructed in May 2008, this innovative 4m tall electrically full-size halfwave vertical dipole, tunable to multiple bands, offers HF coverage despite its space-saving design. Inspired by cost-effective DIY alternatives, the antenna design departs from conventional center-fed approaches, utilizing asymmetrical dimensions. Despite resonance challenges, the antenna's performance remains viable, boasting broad bandwidth and adaptability, as demonstrated through SWR measurements and EZNEC predictions.
[ Hits: 92 | Votes: 0 | Rating: 0 ]
- VDA Antenna for 30m
new
- This project documents the construction and enhancement of a 30m Vertical Dipole Array (VDA) antenna inspired by Remco 7QNL article. Initial design utilized an 18m Spiderbeam pole and a 4m boom. Improvements included a lighter boom structure using fishing rods and a revised coaxial arrangement for enhanced mechanical stability.
[ Hits: 38 | Votes: 0 | Rating: 0 ]
- A centre-fed co-axial dipole for 4m
- Easy to setup dipole antenna for 4 meters band by Tony Hawker G4CJZ
[ Hits: 6607 | Votes: 14 | Rating: 5.78 ]
- 70 MHz Antenna
- OZ1BXM 70 MHz horizontal dipole antenna
[ Hits: 3289 | Votes: 5 | Rating: 3.8 ]
- VHF Resonant Feedline Dipoles
- Resonant Feedline Dipoles for 4m and 2m
[ Hits: 1216 | Votes: 0 | Rating: 0 ]
- 6m and 4m Vertical Dipole Antenna
- The two dipoles are parallel with a distance of 12 cm and are also fed in parallel.
The total length of the 4 m dipole is 208 cm and the 6 m dipole is 280 cm.
[ Hits: 319 | Votes: 6 | Rating: 8.17 ]
- 80m Shortened Dipole Antenna
- This antenna just requires about 24m of free space instead of 41m that a normal half wave 80m antenna needs to hang up. The so called loaded dipole uses a coil in every dipole arm to electrically lengthen the
mechanical too short dipole arms. Every coil has an inductivity of 120 microHenry.
[ Hits: 154 | Votes: 0 | Rating: 0 ]
- Building Coils
- Building coils for a portable dipole using
a novel method of winding coils with weedeater cord!
By K4MMG
[ Hits: 3002 | Votes: 3 | Rating: 2.33 ]
- Inverted V Dipole for 10 15 20 meters
- Inverted V Trapped dipole antenna for 14MHz,
21MHz and 28MHz ham radio bands.
[ Hits: 1298 | Votes: 0 | Rating: 0 ]
- A 10-6-4 three band dipole antenna
- A home made dipole antenna for 10m, 6m, 4m bands made with two sections of 450 and 300 Ohm ladder lines, cut to achieve acceptable SWRs on all bands
[ Hits: 1020 | Votes: 5 | Rating: 8.2 ]
- Modeling an 80/40/20M Fan Dipole for DX
- An interesting presentation of a real multiband Fan Dipole antenna, optimized for better DX operation performances, considering the terrain, position, DX destination path and other influencing factors
[ Hits: 538 | Votes: 2 | Rating: 5.5 ]
- VHF / UHF Antenna Design
- A dipole for 2m, 4m, 6m band an hamdwritten note for a homemade vhf antenna that can be tuned across the VHF band
[ Hits: 1695 | Votes: 10 | Rating: 7.08 ]
- ZS6BKW Antenna
- How to Build a ZS6BKW Antenna, an optimised version of the popular G5RV multiband Antenna, basically a random length dipole with a 450 Ohm ladder line acting as a 1:1 transformer by VK4MDX
[ Hits: 1749 | Votes: 2 | Rating: 7.5 ]
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