#wimocreatesknowledge
Se state pianificando l'acquisto di un amplificatore di potenza (amplificatore per trasmettitori), vi troverete presto di fronte alla questione se utilizzare un PA a valvole o a transistor. In questo articolo, Ekki Plicht, DF4OR, esamina i vantaggi e gli svantaggi di queste due tecnologie.
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Novembre 13, 2023 |...It is worthwhile not only for radio amateurs, but also times with the whole family to observe such shooting star showers optically. To do this, you should look for a place in the region that is as dark as possible. Unfortunately, the light pollution in densely populated areas is enormous, so it is difficult to find a place that is sufficiently dark. Helpful are maps on the Internet, which show the degree of light pollution, e.g. https://www.lightpollutionmap.info oder https://darksitefinder.com/. Or ask the local astronomy group, where they go for observation... No matter if you look at the shooting stars, listen to them or use them actively as reflectors - we wish you a lot of fun and "Clear Skies".
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Marzo 17, 2023
Come si verifica effettivamente la corrosione e cosa si può fare per proteggere gli alberi...
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Marzo 02, 2023
Ludwig, DH8SL, prova il Delta-11 Loop, insieme a un sintonizzatore d'antenna LDG RT-100. Ecco il suo rapporto. Ecco il suo rapporto di prova...
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