hf propagation

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

Cutting Jig for VHF/UHF yagi elements  ^pop - If you want a top-performance VHF/UHF Long Yagi, you will probably have to build it yourself.

VHF/UHF Long Yagi Workshop  ^pop - Yagi plans and notes for 6m, 2m, 70cm and 23cm

G3USF' Worldwide List of HF Beacons - Comprehensive listing of all known current HF beacons from IARU Region 1 HF beacon coordinator

Italian Beacons VHF/UHF/SHF - By I5WBE, Enrico - Beacons Manager VHF/UHF/SHF

RSGB HF Data Band Plans - The following frequencies are assigned to datacommunications in the HF bands within the UK By RSGB data communications committee information.

Townshippers Radio Amateur Club - Quebec Eastern Townships amateur radio club involved in HF contests, VHF-UHF repeaters, VHF-UHF weak signals, APRS, packet, emergency measures.

WinLink 2000 - WinLink 2000 employs Stations World-wide to provide an HF/VHF/UHF digital radio Interface into the Internet Email system for the mobile radio operator. Features include binary and graphic file attachments, APRS position reporting and over 340 downloadable WX products. The mode used is Pactor I and Pactor II.

Emtron  ^pop - Amateur radio HF amplifiers and power supplies manufactured in Australia

RM Italy  ^{updated  pop} - RM is an Italian company operating in the radio communication field since 1974, main products are: HF-CB-VHF-UHF-Dual Band Amplifier, Power Supply, DC-DC Converters Antennas and more

SGC, Inc. - Manufacturer of HF transceivers, antenna couplers, antennas, RF Power amplifiers, portable antennas, speakers and other accessories for 28 years.

Hy Gain  ^pop - HF UHF/VHFAntennas, dipoles, accessories and rotators

Nil-Jon Antennas - Performance Compact Antennas VHF/UHF mobile and base for ham, business, landmobile, police, fire, satellite, APRS, simplex, repeater, TV, FM, scanner or monitoring use.

T.G.M. Communications - MQ-1 four band HF beams 20,15,10,6 meters MQ-2 six band HF beams 20,17,15,12,10,6 meters, beam antennas and Hybrid Quad antennas

Byers chassis kits - Manufacturer of aluminum chassis and cabinet kits. UHF and VHF antenna parts

Ham Radio HF Digital modes - A complete overview of modern digital HF radio operating modes: PACTOR AMTOR GTOR CLOVER RTTY PSK31 HELLSCHREIBER PACKET MT63 MFSK16 THROB.

RMCWEB Uk Repeaters - Information on the UK amateur radio repeater networks.

HB9G RV58 French-Swiss Repeater - French-Swiss Radio Amateur Repeater, located in Switzerland, at 1628 meters.

New Zealand Repeaters - New Zealand Amateur Radio 70, 32 & 23 cm (UHF) Repeaters

Radio Wave Propagation - A PDF document, used for ham radio training, that cover all aspects of radio wave propagation

VHF UHF Microwave Radio Propagation - Notes on radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission

HF Propagation Primer - Flash Movie describing HF (shortwave) radio propagation to beginners. Very helpful aid in understanding.

Radios Online - Public Safety, Aviation, Military, Federal Scanning & HF Information

RDCP/Mac - RDCP/Mac is a communications software package to interface your Macintosh to models of Kantronics TNCs. RDCP/Mac uses the Kantronics HOST mode allowing simultaneous connections on VHF packet and the HF digital modes when using the KAM.

Homebrew a HF Power Amplifier - HF power amplifier project by YB0AH