windom 40

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.

Ground Plane for 7 MHz - How to build a ground plane antenna for the 40 meters band in french

EH antenna for 40 meters band - A 19 inch EH antenna for the 7 MHz

40 meter Moxon by SM0DTK - A wire moxon antenna plan for the 7 Mhz

Vertical Moxon for 40 meters - A vertical half-moxon for the 7 Mhz by F6IRF

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

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

AO-40 70cm Uplink Antenna - Homebrew satellite antenna by G6LVB

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

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

Windom antenna by PU1LHP - Project of a windom multiband antenna for 10 to 80 meters in portuguese

The FD4 Windom antenna - This antenna originated from darc QRV magazine in 1971 should be attributed to DJ2KT, works on 80 40 20 10 meters without ATU, based on the Windom principle.

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

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

Antennae Depot - HF Yagi and Vertical antennas for Amateur Radio. Full line of mono-band HF antennas (40, 20, 15, 10 m) high-efficient yagi beams from Russia

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

SoftRock SDR Interest Group - 5000+ member discussion group for the low-cost series of SoftRock SDR receiver and transceiver kits.