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TX Four Square Antenna - A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.

Trap Dipole for 17 and 20 - M0XDX trap dipole for 17 and 20 metres made from two fibreglass telescopic 5 metre long fishing poles.

Quadruple-Quadlong for the 2-m-Band - The DK7ZB-Quadruple-Quadlong for the 2 meter Band

Bobtail dipole - Bobtails are vertical arrays that look like the letter "E" turned 90° clockwise onto its tails. They have 3 quarter wave vertical elements and are one wavelength long. The Half Square is a shortened Bobtail- it has 2 quarter wave vertical elements and is a half wave long.

Inside view of a Magnetic Loop Balun - Inside view of the RF Systems magnetic longwire Bbalun

Magnetic Long Wire UnUn 9:1 - An impedance transformer (9:1) to feed a high impedance long wire (~450 ohm), down to a 50 ohm unbalanced coaxial input.

DL6WU Yagi antenna - The DL6WU yagi for 23cm bu M1EEV

W3EDP Antenna Checkout for PLP - The W3EDP is a 85 foot long wire and a 17 foot counterpoise. At N4KGL

Longwire Horizontal Antenna - An SWL longwire horizontal antenna

Long wire antenna random wire - About longwire antennas, technically to be a true longwire an antenna needs to be at least one wavelength long, but common use of the term by Hams is for any random wire length that is end fed.

G6RV Antenna - A 35 mt. long wire antenna by Maidstone Amateur Radio Society

70 MHz bandplan - The long range bandplan for 70 MHz by OZ2M

Geelong Radio & Electronics Society - Group of enthusiasts who actively pursue our hobbies of amateur radio, computers and electronics

WK3ATL - Geelong Amateur Radio Club

Kidderminster & District Amateur Radio Society - Kidderminster & District Amateur Radio Society is a long established Society serving the Wyre Forest area.

GM0AYR Ayr Amateur Radio Group - Founded in 1937, the Ayr Amateur Radio Group (AARG) has a long history of being the focus for amateur radio in Ayr and South Ayrshire

Ulvin International - Spanish manufacturer of the Tremendus HF power amplifier from 1 to 12 KW PEP, and 5 KW baluns along to Wattmeters and antenna commuters to 5 KW

C&S Antennas - manufactures HF wire antennas for short, medium and long range communications. The antennas are designed for tactical, emergency and fast-reaction situations.

Cobham Microwave Priority listing - Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.

QRA Calculator  ^updated - Converts your Lat/Long into an IARU Locator

Ground Wave Signal Propagation - Article on propagation basics. The ground wave used for radio communications signal propagation on the long, and medium wave bands for local radio communications

G4ILO : Baofeng in my shirt pocket - UV-3R Review at G4ILO Blog with long textual review, pictures and some sound files

HFUnderground - HFUnderground.com is dedicated to documenting longwave, mediumwave, and shortwave stations, including broadcasters, utility/military stations, pirate radio and spy numbers stations.

ASAP Electronic Component Distributors - ASAP Semiconductor is a premier source for all long lead-time, hard to find, and obsolete components.

Ham Dashboard - Iphone App with list of nearby repeaters in the UK, along with details of input and output frequencies, a map, and a handy bearing arrow for each repeater.