A short dipole wire antenna for 40 meters band. It is a folded dipole that do not make use of coils and can be used either in horizontal or inverted V configuration
MWARA list of major world air route areas frequencies. A wide network of HF Frequencies has been allocated to provide voice communications between aircrews and ATC.
Clean Up Your Signals with Band-Pass Filters, a two-parts article published in this PDF file from a June 1998 QST article
Transverters-Store is a online shop for low cost transverter boards, but also QRP transceivers, Active antennas, RF bridge and probes, Mic equalizers and other amateur radio accessories
Waiting For The Next Sunspot Cycle 2019-2030, how will be the next solay cycle and when it will begin
A project for a simple RTTY decoder based on Arduino UNO R3. Includes the RTTY modem source code available for download along to schematics pictures and references.
A home made VHF 2.5kw RF power amplifier made with a GS35B Triode and designed by Frank F1CXX built in 2003
In this article the author analyze six different type of VHF handheld antennas and as result of his self training on his new vector network analyzer published this interesting report
An old usenet posting about the Azimuth Indicator Problem of the popular Yaesu G-450XL Rotator
Contesting Resources for Amateur Radio – A long list of amateur radio contesting resources collected by K8ZT