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
An antenna preamplifier is usually used in particular. Its task is to amplify the weak signal received by the antenna to the level, which is better processed by the receiver. On higher VHF bands, it is an important part of the reception chain because it enables a low noise figure to be achieved, which would otherwise be aggravated by losses in the power cable between the antenna and the receiver.
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, in OM, except for exceptions with this system
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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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Interruption of DVB -T television reception
Technical, legal and relational solutions to the TVI problem (Interference from television reception by amateur radio broadcasting) has been described many times in amateur radio in recent decades
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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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