CQ-DATV Issue 94 – April 2021

CQ DATV 94 April 2021

The new issue of CQ-DATV is available for download Contents Production Team Editorial News and World round up A Cheap ATV Amp for 420-450 MHz Does DATV Radiate as Far as FM-Voice ? Grass Valley Mixer Conversions – Part 27 Phase Noise Issue Resolved for ADF-5355 MiniTutiouner-Express advert QO-100 All Modes Station Mixed Remote Station Based on SDR ADALM-PLUTO From…

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23cm band in the spotlight with regulators

IARU VHF UHF µWave Newsletter

During the week 15 – 19 February, the preparatory work for WRC-23 agenda item 9.1b continued in ITU‑R Working Party 4C (WP4C). The WRC agenda item has initiated technical studies on coexistence between the radio navigation satellite service (RNSS) and the amateur services in the 23cm band. As usual, the IARU participated in the meeting and delivered key information on amateur activities in this important microwave band. This information is vital…

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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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New IARU Region 1 record on 241 GHz

db6nt recorn 241GHz

Michael DB6NT and Gert DG8EB made on 14.02.2021 at 13:20 a new European/IARU R1 record on 241 GHz. The old record is for 18,523 m improved and now is exactly 38,523 Km. How wrote Michael they had a super sunny winter day. Weather conditions: Temperature: -2° C Relative air humidity: 46%Air pressure: 1042 hPa Wind: 5 Km/h Michael also made…

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

122 GHz OE3WOG OE5VRL

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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