40 dipole

Shortened dipole for 10 & 40m bands - A shorten Dual-Band Dipole with overall length of about 11 m. For this antenna traps are substituted by inductors, in order to cover the 10 & 40 m. Bands.

Easy wire antenna for 40-20-10 meters - PE3HMP project of a triband wire antenna for 40 20 10 meters band, made using home made coils

Invisible DX antenna for the low bands - Article by DK5WL describes a multi-band DX antenna for the 160m-40m amateur radio bands with low visibility but great performance for long distance communication.

Dual Band 40m/17m dipole - A center feed dual band dipole for 40 and 17 meters by W5DXP

2 elements YAGI for field day operation - A wire yagi antenna for 20 and 40 meters band suitable for outdoor and field day operations

Trapped dipole for 40 80m - I0SJC trapped dipole for 40 and 80 meters, traps done with 170 turns 1 mm diam, on a 3.2 mm cilinder in Italian.

4Z5NY Antenn calculators - The formulas for a dipole and vertical, j-pole, double square, Yagi and EH antenna calculators

Inverted V - Described is a simple inverted-V antenna which, when used with a balanced ATU, can be used on all the main Radio Amateur HF bands (80, 40, 20, 15 and 10m). The cental support is made in such a way that the wire can be coiled up for storage when the antenna is taken down.

Off Center Fed Dipole - A K2GXT project documentation of how to homebrew and setup an off-center fed dipole

Feeder Radiation - Connecting centre fed antennas, dipoles, yagis, rhombics, loops to coaxial cable, unless care is taken, it is not difficult to end up with feeder radiation resulting in power loss and the radiation characteristics changes

Log Periodic Dipole Antennas: TITANEX DLPD-15 - Review of the DLPD 15 is a log periodical dipole antenna with 15 elements made with state-of-the-art technology.

Log Periodic of Another Sort - A log periodic dipole array (LPDA) antenna design that offer continuous low SWR in 13-30MHz range

The Thick Loop - 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

The Upright V Dipole - A small antenna for limited space / lanai use.

Traps for 40/80 m dipole - I6DVX article on hoembrewing traps, using vetrnonite instead of common coax cable.

G8JNJ Broadband HF Vertical Antenna - G8JNJ Broadband HF Vertical Antenna - Requires no tuner - great results from 40m to 10m plus 80m & 6m with reduced performance

W3DZZ multiband dipole - The multi-band trapped dipole is resonant on approx 3.7, 7, 14, 24 7 28.5 Mhz. The overall top length needs to be approximately 32.9 Meters

High Performance 802.11 Antenna - It is cheap and simple and has a gain of about 17 dBi.

Homebrew a W3DZZ antenna - Build your own multiband W3DZZ antenna resonating on 80 40 20 15 and 10 meters band

SARL Beacon Project on 40 Meters - The beacon project is a South Africa national system of beacons on the 40 meter band operating on a single frequency

YB9BWN Beacon - Homebrew crystal-based with IRF510 PA at 2W into a dipole

VU2IIA -Ham Radio & NOAA - Ham Radio & NOAA Apt Weather Satellite blog. All weather satellite NOAA APT images are decoded with homebrew receiver. Setup using homebrew Turnstile Cross Dipole antenna, P-3 500MHZ PC with WIN-XP & WXTOIMG program.

WebSDR on 20m, 40m and 80m  ^pop - On this page you can listen to and control a short-wave receiver located at the amateur radio club ETGD at the University of Twente. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio

Lance Johnson Engineering - Manufacturer of ham radio accessories, D-LAY-5 Rotor Brake Delay, ECP-1 Remote 40-80-160 Preamplifier, GP-1 Radial Buss , Kansas City Keyer Elizabeth CO

DK9SQ Antennen - Walter Spieth Antennen offer, Duoband-Portable-Log. Periodic 2m/70cm, Vertical-Loop-Antenna,10-40 Meter and PortableW3DZZ-Antenna as well as fiberglass tubes