QCX transceiver QRP CW

I have been interested in QRP solutions for a long time. Of course, I do not avoid QRO, which like QRP gives me pleasure. Long time ago I built TRX Libra on the 80-meter range, unfortunately I did not have the desire to fully run it. Now I have found a very interesting and modern […]

CHA-250B antenna by SP5GNI

Based on the best experiences found on the web, I made my own copy of the CHA-250B antenna. This antenna has many controversial opinions. I decided to do it because having a Hex-beam directional antenna and SDR radio – I needed a multi-band antenna with omnidirectional characteristics. In addition to the characteristics, the most important […]

LB-523 WiFi temperature and humidity recorder

Thermo-hygrometer WiFi LB-523 is a wireless recorder of relative humidity and air temperature, equipped with a large memory of measurement data. It is powered by batteries (2 x 1.5V AA), rechargeable batteries (2 x 1.2V AA) or an external 5V USB charger. The recorder is equipped with a USB interface (for configuration) and WiFi, allowing […]

How to measure the performance of the HF receiver?

In the comment to “HF5L Radio Club in SSB Fieldday 2018” Marek SP5IXS rightly pointed out that “third order dynamic range is a key parameter”. He also asked good questions: What is the difference between IP3 and “3rd order dynamic range”? What is the relationship between RX sensitivity and “3rd order dynamic range”? As for […]

SV8/SP5ISZ

September 14, 2018 Marek SP5ISZ announced that he had started up QRP from the island of Milos. He had an ICOM 703 (10W only) with a 7.5 Ah battery, an LW 41m antenna about 6m above the ground, about 50m from the sea on the beach. With a 9: 1 transformer, the antenna has tuned […]

HF5L Radio Club in SSB Fieldday 2018

After a successful escapade on the CW part of the Fieldday competition in June, we organized another trip to take part in the phone part of the contest on September 1-2. This time there was no rain or storm, the weather was for 59! There were many operators willing to work on the SSB: Andrzej […]

World Amateur Radio Day

Every April 18, radio amateurs worldwide take to the airwaves in celebration of World Amateur Radio Day. It was on this day in 1925 that the International Amateur Radio Union was formed in Paris. Amateur Radio experimenters were the first to discover that the short wave spectrum – far from being a wasteland – could […]

LB-518 Wireless BLE Temperature & Humidity Logger

LB-518 BLE-LOGGER thermohygrometer is a wireless relative humidity and temperature mini recorder. The logger is equipped with a BLE wireless radio interface. It is powered by an internal exchangeable 3 V battery. For the temperature and humidity measurements, the thermohygrometer uses an integrated, high-quality humidity and temperature sensors. The LB-518 thermohygrometer features an extensive memory […]

Rotator Controller Interface for YAESU G-800DXA, G-1000DXA, G-2800DXA, G-5500

Updated: 2018-08-31. The USB-232B interface allows connection of the YAESU rotator controllers to a PC via the USB port. The interface supports various types of YAESU rotator controllers: G-800DXA, G-1000DXA, G-2800DXA and G-5500. The interface works with many HAM logging programs, for example N1MM, DXLab, HRDRotator, HRDSatTrack, also allowing satellite tracking, using the improved RC5-3 […]