free spectrum analyzer

Shortened vertical antenna for 7 Mhz - A simple drawing of a shortened antenna for 40 meters by using a PVC tube

Small Transmitting Loop Antenna Calculator Priority listing - A free online calculator for making all of the calculations required to design and build small transmitting loop antennas, also known as magnetic loops by 66pacific.com

Shortened G5RV - A shortened G5RV antenna design

Magnetic loop antennas - Drawing and plan for an HF magnetic loop antenna

Moxon for 144 Mhz - A vhf moxon antenna plan

Vertical antenna for Vacation - Vertical Vacation Antenna for 80, 40 and 20 Meter-Band, by Herbert OE3BMB This antenna is a full size λ/4 for 20m and 40m band, and a shortened λ/4 for the 80m band. Generally on the 40m band the SWR is under 1,6. In 80m and 20m band at the resonant frequency the SWR is about 1,1.

Automatic SWR meter  ^updated - Automatic SWR meter and semi-automatic tuning unit by F1FRV

Patch antenna for APT - The patch, or microstrip, antenna has become a common workhorse for the microwave spectrum from about 1 GHz to tens of GHz. This type of antenna consists of two conducting layers separated by a dielectric to form an extended capacitor by WlHDX

Shortened antennas - Drawings of shortened antenna for indoor usage, using short pvc tubes for 2 , 20 and 40 Mhz by f1rfm

CORNET 2.4 giga WIFI antenna

Amateur Radio Swap Shop - Canada Priority listing - Canadian Amateur Radio Swap Shop offering FREE Classifieds and Auctions!

SecondHandRadio.com - Classified ads for used and surplus radio equipment. Place your ad with photos for free

Willtek Communications - Comprehensive range of cutting-edge solutions for testing, measuring, and analysing rf networks and devices. Testers, mobile service testers, handheld spectrum analyzers

Wire Free Direct LtD - UK company that's a full-line dealer for wind and solar power systems, plus system design.

SWL I3-2782/VE - SWL I3-2782/VE Stefano Personal website with qsl card collection and other stuff..

LP-Rotor - LP-Rotor 2.0 is a standalone freeware rotator control program for use with Microsoft Windows. LP-Rotor should work with all versions of Windows from Windows 95 forward. It is designed to be used with the Hy-Gain DCU-1 or RotorEZ interfaces for Hy-Gain rotators, or the RotorCard interface for Yaesu rotators.

Beaclock - A freeware windows program with which radio amateurs can see which of the NCDXF beacons are transmitting at which frquency by DJ1ZN

NBEMS - The Narrow Band Emergency Messaging System (NBEMS) for Windows is a suite of software programs designed for point-to-point, fast, error-free, emergency messaging up to or over 100 miles distant, and takes up a very minimum of frequency space on the ham bands, leaving more space for other ham activites.

W2IOL GCGC Distance/Bearing - Freeware dos and linux command line executables to calculate grid great circle/geodesic distance, azimuth/bearing and MUF calculator by W2IOL

AmateurRadio Ham Test - Free software tests for the Technician, General and Extra class licenses by Shenandoah

DBFToAdif - Freeware , 3.8 MB executable that allows the conversion of some old DBF log files (DXLog, EasyLog, LogPlus, TopLog, TurboLog TotalHAM92) to the ADIF Format by TRX-Manager authors

MacSDR - Freeware SDR for Mac by DO8SEM Sebastian now named SDR Radio by DL2SDR

KC9L PSK - KC9L PSK is a free PSK31 program based on AE4JY’s PSKCore DLL. It supports 5 RX channels, full duplex operation, and more. Even if it's development has been dismissed, is a good tool for windows 95/98 pc.

CYBORG - Freeware windows RTTY PSK31 software decoder that allow logging, award tracking and qsl printing. By SQ1FTB

Free Sun Power - Free basic and advanced system design tutorials for every component and aspect of solar power. Plus system sizing calculators, battery bank calculators and wire size calculators