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Balun single core 4:1 analysis - Real 4:1 Transmission Line Balun with Balanced Load

20m mini loaded dipole - It is very simple to build and you can tune it in your shack room

Magic T combiners splitters - The magic "T" combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads. It is not a magic bullet.

Loading inductors in mobile antennas - Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules. Loading inductors used in mobile HF antennas.

Assembly of the Lightningbolt Quad - One of the best antenna values on the market is the LightningBolt Quad. At about half the cost of a tri-band yagi, you get five band coverage with a single coax feedline and excellent performance from a light, low wind load antenna.

Optimizing Inductors - While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.

ARIDX by UA1AAF - At the moment the most used program is UA1AAF. It is an excellent program written by Boris, UA1AAF, to handle ARI International DX Contest. It can simulate K1EA or N6TR workings; it will be possible to connect the RTX to the computer using a standard interface in such a way as to transmit directly in CW from the keyboard; most of the controls are like K1EA's CT and N6TR's TR ; on line help provides almost all the information necessary for using the program. Is possible to insert QSO after the contest. An appropriate utility in included for conversion in ADIF format. The program is very small and therefore works without any problems on any IBM compatible computer with DOS 3.3 and over or Windows 95/98.

Amateur Radio Band Plan Layout  ^{updated  pop} - Excellent free downloadable band plans layouts ready to print in pdf format by C.Gustave Sandberg W1CGS

LU9DPM Martin - Downloads, colleagues, links, manufacturers and more in English and Spanish

SWL Audio Clips - mp3 files to download produced by an italian SWL. Includes, broadcast stations, air traffic controls, pirate radios

Hy Power Antenna Company - Full size or shortened dipoles, Single band or Multi band, Half Square Antennas, Fan Dipole Antennas, Delta Loop Antennas, Antennas completely assembled Loading coil packages, delta loops

Rotating Tower Systems - Using our components you can build a rotating tower with greater capability than 3-4 static towers. A rotating tower allows common rotation of HF stacked arrays, VHF and UHF arrays, and antennas mounted at optimum heights. Component design also allows tower shunt loading and end support for wire antennas

Alpha Linear Amplifiers  ^pop - RF Concepts manufacturer of Alpha Linear Amplifiers, amateur radio RF power amplifiers, commercial power amplifiers, power meters and dummy loads.

Chip64 - Download chip64, freeware windows digital mode by IZ8BLY Nino

Ford: mobile radio installation guide - Installing a mobile radio by Ford motor company

Icom IC-706 and SGC-230 - Connecting the SG-230 smartuner to the Icom IC-706 pdf file

Icom IC-718 Service manual - Service maual for Icom IC-718

Icom IC-718 manual - Download the Icom IC-718 manual in PDF format

Yaesu FT-100 undocumented - PDF file compiled by PA3GMP about undocumented features of the yaesu ft100 radio

FT-817, FT-847, FT-857, FT-857D, FT-897 and FT-897D Memory Cloning - The complete status of the FT-817, FT-847, FT-857, FT-857D, FT-897 or FT-897D memories can be read into the computer and saved to disk. Any saved file can be subsequently reloaded into the computer and sent back to the rig. This facility uses these rig's ability to clone configurations from one rig to another using the serial port.

FT817 DSP noise reduction noise - Add-on audio DSP unit from BHI

Yaesu FTDX-5000 Manual Part 1 - FTDX-5000 Operating manual part 1

Yaesu VX-5R mods - VX-5R mods collected by QRZ.com

QRZ.com clip arts - Ham radio clip art by qrz.com

HF Rigs db comparison - XLS file with technical specifications about ham radio transceivers