20m j pole

14 links

20m mini dipole antenna - This antenna project is a compact center-loaded wire-dipole. Center-loading is the most efficient way of loading a dipole or mono-pole
[ Hits: 1962 | Votes: 4 | Rating: 9.75 ]

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: 95 | Votes: 0 | Rating: 0 ]

80m OCF Dipole - A simple 7 bands off-center dipole wire antenna designed to work on 80 meters band and that can cover also 40m 30m 20m 15m 12m 10m with acceptable SWR
[ Hits: 2002 | Votes: 2 | Rating: 6 ]

40 meter shortened dipole - M0MCX - Interesting little project with a couple of loading coils by M0MCX
[ Hits: 14308 | Votes: 11 | Rating: 6.55 ]
10 15 20m Open Sleeve Dipole - Based on a simple project based on a 2 elements Yagi for 20m band, and then becomed a triband yagi with a open-sleeve feed system
[ Hits: 786 | Votes: 3 | Rating: 3 ]
A simple 20-40 dipole - A simple to build full length 20/40 dipole antenna to be used in inverted vee configuration
[ Hits: 992 | Votes: 3 | Rating: 5.67 ]

20m Half-Wave End Fed - A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.
[ Hits: 1847 | Votes: 7 | Rating: 8 ]

Fan Dipole for DX - Modeling an 80/40/20M Fan Dipole for DX by Larry Banks, W1DYJ
[ Hits: 1160 | Votes: 3 | Rating: 6 ]
Half Wave Fan Dipole Antenna - Amateur Radio 40m 20m 15m Half Wave Fan dipole antenna project with part list, pictures and drawing. Includes the option to expand the antenna to cover the 80 meters band
[ Hits: 683 | Votes: 1 | Rating: 1 ]
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: 542 | Votes: 2 | Rating: 5.5 ]

J-Pole for 14MHz ^updated - 20 meter wire j-pole for 14.2 MHz, a vertical, end-fed half wave antenna by N1LO
[ Hits: 5235 | Votes: 4 | Rating: 6.25 ]

Heavy Duty linked dipole - A multi band dipole antenna that covers 15m 20m 30m 40m
[ Hits: 1333 | Votes: 0 | Rating: 0 ]
ZS6KMD 20-40m Multiband Dipole - The dipole shown in this document is installed in an inverted Vee configuration, with two leg elements on each side held parallel to each other by 21cm spacers. The upper leg is for 40m and the lower leg for 20m. The spacers are made of 7mm plastic garden hose support for garden sprayers cut to 21cm.
[ Hits: 534 | Votes: 0 | Rating: 0 ]

ZR6KMD 20m Field Dipole - A simple drawing schematic of a portable field dipole for 14 MHz with dimensions in meters and instruction for setting up the antenna and to store the radial for easy transportation
[ Hits: 519 | Votes: 3 | Rating: 7.33 ]