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The design of Ruthroff broadband voltage transformers

A 6 m 50MHz J-Pole antenna by VKADC

A popular 2 meter antenna returns in an improved, easier to reproduce form, 2008 QST article

Ham Radio Android Apps to displays your current QTH locator on Google Maps using the GPS or WiFi / network location.

A beam fractal antenna for 20 meters band

A half-sized Hentenna designed for unique performance in compact spaces. Initially built in 2003 for monitoring a local 146.97 MHz repeater from a basement shop, the antenna proved highly effective, operating at just 200mW. In 2005, it was adapted for use in a challenging river-bottom location, delivering reliable performance on a 2-meter band with 5W. Despite its compact size, the Forktenna demonstrated excellent results compared to a full-sized Hentenna, making it an intriguing option for many hams.

A 40-meter antenna that provides good local and regional coverage during the day and good DX capability at night

This note looks at the antenna and antenna model for the 40 meter Moxon Yagi designed by Dave Leeson, W6NL. The performance of the antenna, through the model, will be explored in several typical settings.

Radial systems for elevated and ground mounted vertical antennas by SteppIR

Designing moxon rectangles by equation and by model L. B. Cebik, W4RNL

6 element super duper moxon antenna for the 144 MHz, a modified HAARP Antenna projetc

SH5 is easy to use contest logs analyzer which creates a variety of HTML statistics from the Cabrillo format log generated by most popuplar contest log software (N1MM Logger+, Win-Test, Writelog, TR4W and others). SH5 allows you to upload contest results to your web site.

Cheap and EZ to build Bi-Directional VHF & HF antennas with gain

This design was adapted from an article in the ARRL Handbook and built with simplicity and duplicity in mind. This antenna is a vast improvement over a standard dipole with a forward gain of around 8db with a front to back ratio of 10db.

Google map beacon map on 10 meter

CW paddle made with a steak knife some simple hardware and a stainless steel fork

A folded wire antenna for 160 meters as appeared on 73 amateur radio magazine june 1997

A compact multiband wire antenna suitable for portable operations.

Build your own multi-band mobile ham antenna with a Hamstick

A home made vertical polarized moxon antenna for 144 MHz, includes dimensions, antenna pattern, SWR and antenna gain plots by WB5CXC

If you want to interface the IC-746 Pro or any other Icom rig with a computer for rig control, an outboard CI-V CAT device is required.

A monoband antenna with large bandwidth in French

A full size delta loop antenna for top band by PA3FUN

ARRL comparison of HF transceivers, including Elekraft, TenTec,Icom, Yaesu and Kenwood recent transceivers based on QST product reviews

An efficient 2 meter antenna disguised as a TV Satellite dish. This vertically polarized horizontal slot antenna, cut into the reflector of a TV dish, might be the ultimate stealth antenna.

This application note is designed to help the reader understand how balun transformers can be used in today's RF/Microwave communication applications.

IC‐2300 MARS/CAP mod expanded frequency range 136‐174 MHz

This project was published in the April 2004 issue of the Australian magazine Amateur Radio, and has been designed using parts which are very readily available.

Excel spreadsheet that help calculating dimensions of a high efficiency magnetic loop antenna for HF bands. Giving in input the loop perimeter, loop diameter and loop conductor will calculate electric characteristics, bandwidth, and efficiency

W3EDP multiband wire antenna, an extensive study and analysis of this antenna by W0ESE

Transverter for 70MHz, a project by G3XBM

Progress in Design of Extremely Short Transmitting Antennas Short and still efficient, how is that possible? By Juergen Schaefer, DL7PE author of the MicroVert antenna concept. The MicroVert introduced in this document is an extremely short and hardly visible short-wave antenna with outstanding radiation properties

J-pole designs, for 50 to 450 MHz by WA6ESC

English version of the Yaesu FT-7800 operating manual

A project for a homemade multiband Hexbeam antenna for 10, 12, 15, 17 and 20 meters

Gap Titan DX Antenna manual. This is an enhanced version of the common Gap Titan DX Manual document you can download from other sites. This manual is in PDF Format.

F5DQK repairing and swr measurement tests of a Cushcraft R7 Antenna

This is a 6 band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. This is a 6-band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. Stop band reject may be limited by the relay isolation. Worse case isolation is at 28 MHz or 35 dB or better. Relay K3/K8 protects the filter during transmit via the PTT line. A 25-50ms delay must be used between transmit and PTT. Do not rely on your radio to provide adequate delay with out using the PTT. You logging software must be set to allow a delay between PTT and time of 1st transmit. This filter will not work with VOX or QSK keying as you will damage the filter.

KG4JJH moxon assembly plan for the 50 Mhz in a pdf file

Club dedicated to the world of Hellschreiber

The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency.

Lighting protection document by Glen E. Zook

An Arduino project to make it work as a KISS TNC

An easy mod to make the 1st IF of the Icom IC-7600 accessible and connect to a cheap RTL SDR dongle by VE4NSA

The HF ham bands can be mysterious. Some work at night, some during the day. Some seem to be good for long distance contacts while some are better for nearby contacts. Even worse, they change tremendously from hour to hour and day to day. An overview on operating on HF amateur radio bands

A moxon antenna project for 70 cm band, test and results of this popular antenna model applies to UHF bands.

CWQSO allows you to practice sending and receiving CW in a real QSO!

A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.

A project of a semi vertical trap antenna that can be tuned for 7 bands

The SARK100 Antenna Analyzer it is yet another antenna analyzer but available in kit form and designed to be easy to assemble and with an affordable pricing.