M17 Project – new digital radio protocol

M17 new digital radio protocol hamradio amateurradio

Before few months, Wojciech SP5WWP informed us about M17 project. M17 is a new digital radio protocol in development as an alternative to those currently available, with freedom in mind. “The goal here should be to kick the proprietary protocols off the airwaves, replace DMR, Fusion, D-Star, etc. To do that, it’s not just good enough to be open, it…

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Over 50 km on 481 THz! Great news from SP

PK UKF 481 THz

On May 8, 2021, the group of Polish radio amateurs: Marek SP4ELF, Jurek SP2GUB, Adam SQ2DOL, Piotr SQ4MIK, and Jarek SQ4IOB realized optical communication (481 THz) between the locators KO04nd40DA and KO04fi31GV for a distance of 50.018 km. So they have broken the magic limit of 50 km! Congratulations! Read more on: http://mikrofale.cafe/showthread.php?tid=248 https://pk-ukf.pl/optyczne-qso-na-odleglosc-50km/ Pictures: https://photos.google.com/share/AF1QipNqhgzWZOJDFAMIwAlOCQ1vXA-EPRS9rTA-oRjSj8ranU7N7XbhAZJlsWPDFoyPqg?key=NWoxVk02UW1jbHp6NWVVX1Y3a2JYb1dtcExwRUd3 Cover picture: https://pk-ukf.pl/optyczne-qso-na-odleglosc-50km/#iLightbox[gallery5661]/0 Thank…

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Free RF Engineering Software for Hamradio Enthusiasts


If you create your own hardware you need good software tools to doing that. Professional software is too expensive for hobby users but some free software tools doing a good job too. SignalIntegrity – is Python based software for signal and power integrity brought to you by Teledyne LeCroy. It has two main uses: SignalIntegrityApp – A GUI software application that…

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OK1UFL – 122GHz version according to VK3CV

OK1UFL 122GHZ transverter

Mila OK1UFL shared his experience about assembling and using a VK3CV transverter for 122GHz. Mila tested also a few 10MHz oscillators to improve frequency stability. He used a camping 40 cm offset dish and is nice to view how to find focus. Link to the original article in the Czech language (use google translate options or similar): https://ok1em.blogspot.com/2021/02/test.html Enjoy reading!…

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World record on 122 GHz, experience and equipment [2014]


Matej OK1TEH made a full translation into Czech and English (with permission from OE5VRL and OE4WOG) of one very interesting article about 122 GHz. The article isn’t new but it hadn’t been online till now. Thank you to Matej OK1TEH for the translation and info about the article. The article you can read here: http://www.ok2kkw.com/47g/122g_oe5vrl_oe4wog2014eng.htm Enjoy reading! Picture: from the article

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New 30THz band used for experimental Amateur radio communications


In November 2020, Andrew VK3CV / WQ1S and Karl VK3LN made a contact in a previously un-explored section of the upper electromagnetic spectrum at 30 Terahertz (THz) which is 30,000 GHz. A two way contact over 60 metres distance was achieved with 5×5 signals received each way. The contact is believed to be the first ever in this band anywhere…

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