Technical & Featured Articles

Building a 4-Element Yagi Antenna for the 6m Band

An email and a phone call with my friend Kostas SV1DPI were enough to convince me to share with you my experiences on building an antenna for 50MHz, hoping to motivate you and help you […]

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Lightning Protection of an Amateur Radio Station

Is there really a danger of “the sky falling on our heads”? Lightning protection of our station and our house is always a move in the right direction. Let’s see how it is done and […]

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How-To Easily Measure Unwanted RF

Recently I have noticed that there is a lot of interest in the amateur radio community regarding baluns-chokes with ferrites, the placement of which is intended to reduce returned and unwanted RF. Introduction Most of […]

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How-To Install Hamclock on Ubuntu 20

Hamclock is a handy application able to show: accurate time, world map & time zone, solar activity, sunrise and sunset times (grey line), DX Cluster Spots, Beam heading & Maidenhead Grid Locators, Northern California DX […]

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QSL-ing via the Bureau and more

There may be many ways to confirm a QSO with another station (LoTW, E-qsl, etc.), but the top way, in my opinion, is the QSL card and especially the one we will receive for free […]

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Analysis of Spots reported by the SZ1A Skimmer

You may have read a previous article of mine (Greek), here on SZ1A, about skimmers. How do we put all this into practice? How will this technology be useful in our daily lives? How can […]

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SSB QSO via Qatar OSCAR-100 - The First Geostationary Satellite carrying Amateur Radio

A Practical Guide to Getting on Qatar OSCAR-100 (video)

An Introduction Qatar OSCAR 100 launched on November 15, 2018, and is the first geostationary satellite with an amateur radio transponder on-board. It is a joint project of the Qatar Satellite Company (Es’hailSat), the Qatar […]

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6m (50.1MHz) Far Field Plot of End-Fed Half Wave Antenna

End-Fed Half Wave (EFHW) Antenna Modeling with MMANA-GAL

I wanted a quick & easy to install high-power multiband wire antenna for field-day and temporary operations and I’ve been hearing a lot about End-Fed Halfwave antennas lately. So I recently purchased the EFHW-8010-2K from Myantennas.com which […]

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Make your own propagation forecast with W6EL

Written by Kostas Stamatis, SV1DPI Carl Luetzelschwab, K9LA back in 2004, wrote an article called “An Introductory Tutorial to W6ELProp – Running Your Own Propagation Predictions”. This file helped me a lot to understand how […]

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