long range

Balun and Transformer Core Selection - Occasionally errors are made regarding core selection. This especially includes baluns, where on occasion some very strange ideas surface.

RF in shack with vertical and longwire antennas - Why a vertical antenna or longwire antenna might require a balun

Installing a balun - The correct way to install a lowngwire antenna with a balun

Longwire Antenna Balun Project  ^pop - Home brew a long wire balun

Antenna Transmatch Tips - Tips on tuning antennas using Antenna Tuning Units also called ATU. This article explains the functions and ills of tuners, along with some guide- lines for building an ATU.

A 16 Turn S-Band Helix - This design represents the smallest practical antenna for Oscar-13 mode-S. Perfect beacon reception at all times is possible, and acceptable SSB even at 43,000 km range.

PAC-12 Vertical portable antenna - Build the PAC-12 Antenna a multi-band portable vertical designed by KA5DVS, here’s an award-winning, easy-to-homebrew, multi-band portable vertical antenna designed by long-time antenna aficionado James Bennett, KA5DVS. He’s documented the design and construction plans for a portable antenna

A low cost fishing pole vertical antenna  ^pop - This antenna is based on a 10 Metre long fibreglass fishing pole, by G4AON

How to build a tin can waveguide antenna  ^pop - Looking for an inexpensive way to increase the range of your wireless network? A tin can waveguide antenna, or Cantenna, may be just the ticket. This design can be built for under $5 U.S. and reuses a food, juice, or other tin can.

14Km 802.11B link test  ^pop - G7EYT, Carl - G6NLC and Neil - M1NCD sucessfully completed a 14Km range check with 802.11B equipment and home built antenna's.

2.4GHz Cubic Quad Antenna  ^pop - The Cubic Quad antenna is a commonly homemade antenna in the range of about 150 odd MHz. Our little project was to design one of these for use in the 2.4GHz range for 802.11 wireless LANs.

KE9V Long delayed echoes - a Podcast for amateur radio enthusiasts... by jeff davis, ke9v

KB1NIR Blog - KB1NIR B.K. DeLong personal blog

New York Long Island Scanner Pages  ^pop - New York / Long Island Scanner forums, chat, and live scanner feeds of Nassau County Fire Departments. Site registration is needed to listen to the live feeds

WiNRADiO Communications - WiNRADiO Communications manufacture radio communications equipment for a very wide range of applications. Our customers include professional communications radio users in government, military, security, surveillance, spectrum monitoring organizations, telecommunications, industry, as well as radio and computer enthusiasts.

GAO Engineering - Gao engineering offers a wide range of affordable, popular and reliable rfid products, dsp, arm and other microprocessor evm and development boards, ides, universal programmers, emulators, dsp learning systems, micro-network terminals, test and measurement products for engineers.

Domino - Domino is the name given by the developers to a family of IFK coded coherent phase single tone MFSK keyed modes, using sequential tone-pairs in two alternate fields arranged as orthogonal but interleaved tone sets.

Mfsk - MFSK is an easy-to-use chat mode for real-time amateur contacts, nets and bulletin transmissions, but not intended for contesting or Bulletin Board System (BBS) use. It is a half-duplex non-Automatic Repeat ReQuest (ARQ) forward-error-correcting (FEC) mode. It performs well on long-path fading conditions and in the presence of interference

Mfsk - MFSK is an easy-to-use chat mode for real-time amateur contacts, nets and bulletin transmissions, but not intended for contesting or Bulletin Board System (BBS) use. It is a half-duplex non-Automatic Repeat ReQuest (ARQ) forward-error-correcting (FEC) mode. It performs well on long-path fading conditions and in the presence of interference

AT-897 Autotuner for Yaesu FT-897 - Broad range automatic antenna tuner, mounts on the side of your FT-897 just like the original equipment.

Heston Supply - Adapters, Antenna and Antenna Parts, Coax and Wire, Connectors from Longview WA

Durham Radio - Durham Radio stocks a wide variety of Amateur radio products by ADI, Alinco, Alpha Delta, Ameco, Ameritron, ARRL, Bencher, Comet, Cushcraft, Daiwa, DCI, Galaxy, Heil, HyGain, Icom, Iron Horse, Kenwood, Larsen, Maldol, MFJ, Opek, Palstar, Procomm, Pryme, Ranger, Signal Links, Tigertronics, Valor, Vectronics, Vertex Standard, Workman, Yaesu.

BB Shopping UK Distributor of PMR 446 Priority listing - We stock a range of two way PMR446 radios. PMR 446 is a license free frequency, which means that you can communicate for up to 3km (terrain allowing) without any call charges or license requirements. They can be used in most European countries and are ideal for holiday trips.

Radio Products UK - RPUK Ltd market a high quality range of covert earpieces for two way radios, including Motorola and Kenwood

Dream - Opensource software implementation of a DRM Receiver. Digital Radio Mondiale (DRM) is a new digital radio standard for the long-, medium- and short-wave ranges