– your microwaves world –
On weblink History of 122 GHz band in OK you can read a very interesting article about the development of 122 GHz amateur radio equipment, first attempts, and first QSOs in OK. Also, on these web page, under the text, you can find more links to the articles about the history of microwave bands in OK. Enjoy reading! Photo credit:…
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From OK2KKW webpage, a nice story about first OK QSO on 10 GHz: Another piece, representing the level of our technology, they had with them at Klínovec OK1KAD – the first device for 10 GHz, equipped with a klystron and a superheat receiver. Unfortunately, due to an unfavorable coincidence, the connection failed to a greater distance. One of the facilities…
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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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Here you can find a W5LUA report about testing of LNA for 76GHz. LNA is named a Octapak. And important information, more LNAs are available! Picture: from pdf presentation
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Do you know, the current world distance record on the 76 GHz band is 289 kilometers (180 mi) and set by US stations AD6IW and KF6KVG / K6GZA on June 14, 2014? Here we bring short video and few pictures: Here is list of records set in others countries: 08 Mar 2011, DL2AM/P and DJ5AP/P, distance 224 km, CW Tropo 15 October…
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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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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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Flyswatter Antenna on 5760 MHz I wanted to put up a dedicated antenna for 5760 MHz….. My flyswatter has worked well on 47 and 76 GHz so why not 5760 MHz? Next step was to check out the W1GHz Periscope Antenna Gain Calculator. Then do I have enough coax/waveguide to get out to the base of the rotating tower? DOWNLOAD…
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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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Something for 122GHz fans 🙂 You can more read on https://ok1em.blogspot.com/2021/01/externi-mixer-pro-122-ghz.html Picture: screenshot from the video
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