Lighthouse OE3XTR in Austria
For income testing, comparison of antennas, rotator setting, propagation conditions are detected - some signal source is suitable for this. VHF radio amateurs
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preamplifier
Zvyčajne sa používa najmä anténny predzosilňovač. Jeho úlohou je zosilniť slabý prijatý signál anténou na úroveň, ktorá je lepšie spracovaná prijímačom. Na vyšších VKV pásmach je dôležitou súčasťou príjmového reťazca pretože umožňuje dosiahnuť nízke šumové číslo, ktoré by inak bolo zhoršené aj stratami v napájacom kábli medzi anténou a prijímačom.
Elaborated answers for radio amateur exams
When preparing for radio amateur exams, it is difficult for interested parties to obtain comprehensible documents, from which they would understand the issues of electrical engineering and radio engineering.
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ZD7GWM / B beacon captured by F0FYF on 144 MHz for distance 7000 km!
Garry ZD7GWM recently launched a lighthouse on St. Helena Island 144,475 MHz with a power of 20W CW. OM0AAJ Jano
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How to get started with APRS via International Space Station (ISS)
While there is no APRS in OK (While there is no APRS in OK) While there is no APRS in OK, v OM sa až na výnimky s týmto systémom
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Low noise preamplifier OZ2OE 21 – 30 MHz
The author of the following connection is Ole OZ2OE. The original description in English can be found at http://hjem.get2net.dk/ole_nykjaer/oz2oe/hfpreamp/hfpreamp.html. we thank you! Preamplifier to “deaf” HF receiver. Suitable
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Low noise preamplifier on 144 MHz OZ2OE
Another article from Ole OZ2OE is a low - noise preamplifier on 144 MHz s BF981, which makes a profit 23 dB at noise
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Satellite DX-ing on FO-29
The FO-29 is one of the satellites providing the greatest DX capabilities. The advantage is stable operation, good track height (polar, with perige between 800
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Preamplifier for beverage antenna
Beverage antenna as a special receiving antenna has the disadvantage of lower gain and thus subjectively attenuates the signals when switching
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Beverage antenna
Beverage antenna is a special receiving antenna suitable especially for lower HF bands. In the CQ WPX Conteste, OM0A used a beverage
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Simple GaAs FET Preamplifier on 144 a 432 MHz
Today it is not a problem to get a solid GaAs transistor, nevertheless, the design of the preamplifier has two pitfalls - obtaining quality capacitance
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Lomnický štít: disadvantage of VHF races?
When it comes to Lomnický štít and VHF races, most knowledgeable radio amateurs will remember the second highest peak of the Tatras as an ideal place,
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