Meeting with SP5EAQ

On May 19, at the HF5L club location, a social meeting was held, at which Jacek SP5EAQ gave a presentation about the preparations and the realization of his expedition to the Pacific Austral Islands. They belong to French Polynesia but are a separate DXCC (FO-A). Jacek worked on the bands from the Rimatara Island under […]


In March 2021, a revised version of Adalm-Pluto Revision D was released. Version C was identical to version B (without the 2 blue wires). Analog Device has released new information regarding revision D. Since the firmware is the same between revision D and revision C, the firmware identifies and recognizes revision D hardware as revision […]

Organization of the expedition during the pandemic

I have been organizing ham radio expeditions to the South Pacific for over ten years. I go alone or with a few friends. We make several thousand contacts and visit another cool place on Earth. The pandemic stopped everything. The number of trips to the Pacific in the world has decreased almost tenfold. Sanitary regulations […]

CQWW DX Contest SSB 2021 on QRP

Hello everyone! As you know, I have been promoting QRP for many years, also in competitions. Unfortunately, until 2019, working in low-power competitions did not make sense due to propagation on the upper bands. In 2020 already I returned to QRP at CQWW. Usually, I choose one upper band to sleep at night. And what […]

Wireless Communication in Polish Home Army 1939-1945

August 1 is another anniversary of the outbreak of the Warsaw Uprising in 1944, so important to all Poles. This is an excellent opportunity to present the heroic struggle of the soldiers of the Uprising in terms of military radio technology. Thanks to my colleagues SP3LD and SP3CSD, I learned about Louis Meulstee’s publications on […]

My radio shack

Radio shack – this term does not need to be translated into another language. Every ham knows what this means because he has his own … Whatever it is, it is everyone’s pride. During contacts, we often wonder – what does our correspondent’s workplace look like? Below we present an open gallery of “radio shacks” […]

QCX transceiver QRP in SSB version

In the post “QCX transceiver QRP CW ” Piotr SQ5JUP described his experience with the QRP Labs mini-transceiver. Below is how to build a QSX SSB from the new QCX+ kit. The contents of the QCX+ kit from QRP-Labs is shown below.               The boards were assembled step […]

Happy Easter !

Health, happiness, good humor, tasty egg, wet dyngus and, above all, good luck in the SP DX Contest 2021!

Transceiver uSDX with Arduino Nano

Personally, I think that a “real” SDR radio is one where the radio signal is received by the antenna and then (possibly after passing through passive filtering circuits) is sampled by an analog-to-digital converter. Further processing of the signal takes place in the digital domain. However, the SDR category also includes other devices which to […]

Software Defined Radio with Arduino Nano

Arduino is a favorite toy for electronics enthusiasts. There are thousands of designs around these modules. Here’s the next one – the simplest and cheapest SDR receiver in the world! A “real” SDR radio is one where the RF signal received by the antenna is directly sampled by an analog-to-digital converter. Further processing of the […]