hf amplifiers

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.

UHF Associates and WB6ZOD - UHF Associates and the WB6ZOD remote base serve the greater Los Angeles area including Los Angeles, Orange and San Bernardino Counties

F6CRP Denis Priority listing - Site devoted to weak signal traffic SSB/CW V/UHF meteor Scatter,tropo, aurora, fai, ES homebrew

PA5DD Uffe - VHF & microwave web site

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.

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

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

Hamtronics, Inc. VHF/UHF FM Receivers - A full line of single-channel synthesized and crystal controlled vhf and uhf fm receivers. Great for repeaters, telemetry, and control applications.

Hamtronics, Inc. VHF/UHF Repeaters - A full line of repeaters, modules to build repeaters, and accessories.

GB3DM - Dumbarton District's UHF Repeater in Scotland

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.

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

Sporadic-E - Short notes about sporadic E influence on VHF propagation

Ten Tec Orion II Official page - Orion II HF DSP Transceiver

Scaning The Utilities - Hf, vhf, and uhf utility listening, police frequencies, shuttle, aero, usaf callsigns and many other services

AirMail - AirMail is a HF radio mail program for sending and receiving messages via Pactor, either via the ham radio system or participating marine or commercial services

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.

Fitting a PL259 to a coaxial cable - Quick and dirty method to fit a common PL259 to coax cable