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NW7US logging program for palm/os

Description of the 80m antenna used at CN2WW in the ARRL-DX CW 2007

A vertical dipole for 7MHz and 21MHz by OH3GGQ

By Alfred T Yerger II WA2EHI, in this PDF file explain how to remote your rig via the internet by using HRD Ham Radio Deluxe and skype

Leading supplier of low and high frequency electronic filter design products for the design of wireless telecommunications equipment, semiconductors and more

Getting started with RTLSDR on MacOSX

Take the mystery and mystique out of standing wave ratio. QST Article by K5DVW

Construction details and tests about a 2 elements cubical quad antenna for HF Bands (20,17,15,12 and 10m band).

Technical details of the yaesu FT 9000

A freeware apple Macintosh-based program that helps amateur radio contesters by converting a log from a radio contest into the Cabrillo file format which may be submitted to the contest sponsor.

K2 logging system by WB2QAP, logs ARCI sponsored contests and others with same point system

Yagi-logper is a linux GPL program to model a Yagi or Log-periodic antennas with horizontal cylindrical dipoles.

Radio communication equipment installation recommendations

An end-fed halfwave antenna for 20 meters band with balun pictures and description by PD7MAA

ACOM 1000 modification uses electric band switching, such that both 6m and 4m operation can be maintained.

How to build the Quickie Pneumatic Antenna Launcher

RCKLog is a windows freeware program for logging and administration of SSB and CW-Contest with simultaneous control of transceiver and real-time operation of Packet-Radio.

A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!

The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler

Logbuchprogramm, DOS and Windows Logbook for radio amateurs written by DK8AT

A project for a home made 5 element yagi-uda antenna for 2 meters, covering 144-148 MHz band by N1BMX

DIY kits a 70W SSB linear Power Amplifier for YAESU FT-817 KX3 running HF 80m-10m bands

EA4EOZ home made baluns

Over 47 full-screen maps are available within _NAOMI_ (North American Overlay Mapper), a free Windows program designed for US and Canadian amateur radio enthusiasts. This mapping suite includes 9 backgrounds such as CQ Zones, ITU Zones, and ARRL Sections, along with 16 foreground layers like Counties, Areacodes, and Grid Locators. Users can calculate distances and bearings, track real-time mouse positions with continuous Grid-Locator data, and integrate with APRS for live station tracking via the FindU database. For a global perspective, the _Global Overlay Mapper_ (GOM) provides a world map, 8 continental maps, and 29 sub-continental maps, all with 12 active layers including Country Outlines, CQ/ITU Zones, and Prefix information. Both NAOMI and GOM offer feature-locate systems to jump to positions based on prefixes, capital cities, or Grid Locators, and provide customized beam headings and distance displays. The site also features _LogView_, a post-contest log visualization tool that analyzes Cabrillo-format logs by plotting QSOs on maps, supporting over 30 major contests like CQWW and ARRL DX, and allowing comparison with published results.

A free to download and print, paper log sheet useful for portable amateur radio operations, in a PDF file.

Universal radio IC-V8000 page includes accessories and photos

Search the J5T Log online DX Pedition to Guinea Bissau 2017

Building a cavity resonator for 144 MHz

Highly integrated Logging, DXing, Contesting and Station Control Software, commercial version, run under windows 2000 or higher.

3 Element reversable quad antenna for 40 meters band

QRP DIY and more

CB Radio and 10 meter Radio reviews & mods blog. Most articles are in Japanese

Some antenna manufacturers place baluns at the incorrect location in LPDA arrays. If we consider what the balun does we can see how the mistake occurs.

HF power amplifier project powered by GU-78B by SV8JE

Homebrew G5RV a simple multiband antenna. This article shows detailed pictures of a G5RV home made antenna, including antenna size and dimensions by 9M2ZAK

A neat free little tool to log your contacts. It automatically looks up previous contacts with recent call. Select text in MRP40 Rx- window. Auto insert that text into MiniLog via double click. By Polar Electric

ARRL Lab notes, article by WB8IMY on helping choosing the best transceiver for your needs.

67 ft antenna for portable operation by VE3CLQ

Freeware easy to use amateur radio logging software with basic features.

Causes and advices on malfunctioning display in the control head of the FT-857, where several scan lines in the dot-matrix display cease to function, so the display seems streaked at places

A UHF antenna for satellite reception. Anntenna mast is in wood, made with two aluminium rods

The HB9CV is a well known two element antenna of a directional beam type with a forward gain of 4 to 5 dBd. This one is for two metres but it can be scaled, from the dimensions in the diagram, for other bands I have also made them for four and six metres

RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset. This is a blog about rtl-sdr, software defined radio and their developments and applications.

My MMPRINT utility is a post contest tool that lets you extract statistical data from a CT log file

TX3A online log for Chesterfield Islands 2009

German only web blog from HB9 with link to personal webcam

ST2NH blog - first ham blog from africa fatures QRP,Homebrew,news,links

Online log for VK9XX 2009 DXPedtion to Christmas Island

Up to date log for 9K2HN & 9K9X (contest call)