Dell Wyse 5070 – Home Server

Recently I have upgraded my home server to Dell Wyse 5070 Extended. This is a very interesting low power computer in a small form factor. My unit came with Pentium J5005 CPU, 8 GB DDR4 RAM (2 × 4 GB), an Radeon E9173 PCIe graphics card and a M.2 SATA SSD drive. The case is really nice, but the Windows sticker is not. There are many ports around, but I’m not going to use most of them anyway.

My previous setup based on Celeron J1900, 16 GB RAM and Intel 730 SSD has been working fine for 7 years with many services, including website. I decided to build a new Linux home server, which could also be sufficient for such a long time, while still keeping the power consumption at a low level.

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Nowa era telewizji cyfrowej w Polsce

W momencie pisania artykułu jesteśmy dosłownie na półmetku wdrożenia nowego standardu nadawania naziemnej telewizji cyfrowej DVB-T2 HEVC. Parę tygodni temu zakończył się drugi etap, którego sam mogłem doświadczyć, a już wielkimi krokami nadchodzi kolejny trzeci. Co oznacza ta cała zmiana standardu? Jak się przygotować do zmian lub jak przywrócić możliwość oglądania telewizji, gdy okazało się, że niestety nie byliśmy przygotowani do zmiany standardu. Wszystko postaram się Wam opisać w tym artykule o nietypowej jak na stronę tematyce.

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Bandscan w Barcelonie – 2022-05-02

W związku z wyjazdem służbowym postanowiłem zabrać ze sobą radio Xhdata D808. Radio to cechuje się nadzwyczaj dobrą selektywnością na UKF, możliwością przestrajania o 10kHz oraz posiadanym RDS, w dodatku jest kompaktowe oraz lekkie, także świetnie nadaje się do podróży. Przy okazji zabrałem również ze sobą zwijaną antenę Sony AN-71 zapinaną na antenę teleskopową, która ze względu na potworny QRM na niższych pasmach KF raczej się nie przydała.

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Raspberry PI 4: PoE with LM2596

During last Black Friday I bought Raspberry PI 4 on Aliexpress for just $36. After initial tests I’ve found out that a good cooling case is definitely a must have. The SoC quickly reaches 80°C under a full load and then throttles from 1.5 to 1.0 GHz per ARM core to maintain the temperature limit, so I ordered a very nice Chinese aluminum case. I love PoE devices – my new toy must also support Power over Ethernet – and it does!

I took a cheap LM2596 DC converter and installed it together with the board in the aluminium case.

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5 GHz Wi-Fi DX record – Denmark logged in Poland @ 745 km

A remarkable tropospheric ducting occurred on August 11 and 12, 2020 between Poland, Sweden and Denmark. The propagation forecasts, which use color hue to scale their intensity, featured red shades over the Baltic Sea. Such a propagation strength is very rare, if ever seen on a forecast for this area. I was looking forward for something extraordinary, especially on the microwave bands. My stationary Wi-Fi DXing setup has been damaged three months ago. I could not miss such an opening, so a DX-pedition was the only option. In the evening of August 11 I made an opportunistic decision to visit the Dylewska Góra in north-eastern Poland. A few hours later, I was standing there with an antenna inside a lookout tower. 

With its tip at 312 m ASL, Dylewska Góra (Dylewska Mountain) near Ostróda is the highest hill of the whole north-eastern Poland. There is a wooden lookout tower atop which provides fantastic unobstructed views between 175° to 340° azimuth with optical visibility up to around 50 km. The driving distance from my location is 135 km and I arrived there in two hours, in the middle of the night (2 AM). I knew that place as I have visited it already once with my friend. Back then in the 2018 we encountered a typical morning inversion without any notable long-range ducting (see the report: Early morning on Dylewska Góra).

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