20m loop

PV5 Yagi antenna for 20m - 5 elelents yagi beam antenna for 20 meters band by T93M

Delta-Loop for 40 Meters - Two-element Parasitic Delta-Loop Array for 40 Meters by WB3HUZ

Loop Antenna for 6m  ^pop - Indoor loop antenna for six meters band, project by Colen Harlow, G8BTK

A magnetic loop antenna for HF  ^pop - Able to cover all frequencies between 3.5 and about 10 MHz, the loop described here is directional, does not require a radial system, and stands just 1.8 metres tall. Most parts needed can be purchased at a hardware shop. The antenna can be put together in an afternoon and requires only hand tools to assemble. It should cost less than sixty dollars to build. by Peter Parker VK3YE ex VK1PK

AM Antennas  ^pop - The ultimate AM loop antenna article. It is the only article that includes the calculations and detailed plans

The Carpet loop indoor antenna  ^pop - High performance indoor shortwave antenna, the Carpet Loop II is an ideal step upward for the listener who wants something better than a random wire but doesn't want the expensive dice roll of an active antenna.

Remote Loop Tuning - Lyle Koehler's article on remote use of LF loop antennas for receiving purposes.

Multi Turn Magnetic Loop for 40/60/80 - The 40/60/80 is a portable loop that covers 80 meters with a high degree of compromise

GM3MXN Magnetic Loop Antenna - This article describes a loop usable from 7 - 21 mHz, using half inch copper tube 3 feet in circumference

A magnetic loop antenna  ^pop - Magnetic loop antenna by GM3MXN

Center-Loaded Off-Center-Fed Dipole - 6 band - Multiband Center-Loaded Off-Center-Fed Dipole (CL-OCFD) antenna that work on 80m 40m 30m 20m 15m 10m by ON4AA

RockLoop Antenna  ^pop - A Compact antenna for 10.1, 14 & 21 Mhz Bands. A multiband portable antenna suitable for QRP operations.

160/80m Coaxial Receiving Loop Antennas  ^pop - Receiving loop antenna for top band. This antenna allow to reduce noise on both bands. The stand alone 80m loop is approximately four feet in diameter. And made of light weight material. Which makes it ideal for portable use or you can mount it above a pre-existing vhf antenna, and due to it's small size it is quite rotatable.

LF Receiving Loop - A really simple LF receiving loop antenna

Omiss - OM International sideband society incorporated nets 75M, 40M, and 20M Nets begin one hour earlier during Daylight Savings Time

PSK31 Web Receiver - These web receiver based in Kiew Ukraine show PSK31 activity on 20m band 14.070-14.074 MHz remotely by using a web browser. Requires java by the MixW team

FR Radio Lab - Magnetic Loop antennas, also availble in parts from japan

The Ventenna - Rugged, disguised 2m, 220MHz, 440MHz, and 2m/440 dual band antennas, HF portable antennas, portable dipoles.

Delta X-Ray Antennas - Antenna Manufacturer HF Delta Loops and VHF/UHF Ground Planes

Wellbrook Communications - Broadband active loop antennas for radio amateurs and hobbyists

Palomar Engineers - RFI Kit, ferrite cores, baluns, loop antennas, antenna tuners and various accessories

Latest Satellite Pictures - Visible images and loops, infra-Red images and loops, water vapor images

Funkenhauser's WHAMLOG & Mediumwave DX Links - Free WHAMLOG files download page, medium wave (AM/BCB) resources, homebrew loop antennas, radio receivers, DX lists, DXpeditions, ODXA MW Notebook.

PLL2 - 2nd Order phase locked loop design for passive and active circuits. Bode plot, step response, design parameters

Universal LF/MF Preamplifier - "A ""Universal Antenna Preamplifier"" design, in Web page form. Works with long wires, loops, or whips. For longwave and medium wave."