Každý rádioamatér, ktorý sa niekedy pustil do stavby balunu, anténneho choke, širokopásmového transformátora, LPF, BPF alebo VF zosilňovača, skôr či…
antenna
W3DZZ, G5RV, DK7ZB, G0KSC, DG7YBN,… what do these brands mean? They are HF and VHF antenna designs. The antenna is and decisive factor in reception and transmission, which significantly affects the result. Other types of antennas include quad, parabolic antennas, quagi, K9AY, beverage, slooper,… The advantages and disadvantages of each type of antenna can be discussed for and long time.
Súčasný rozmach rádioamatérskych satelitov pracujúcich na nízkej obežnej dráhe (LEO) prináša operátorom nové možnosti, ale aj technické výzvy. Či už…
Meranie and optimalizácia anténnych systémov, filtrov and vysokofrekvenčných (VF) obvodov boli po dlhé desaťročia doménou drahých laboratórnych prístrojov. Bežný rádioamatér…
Letné mesiace and búrková činnosť prinášajú pre každého rádioamatéra obdobie zvýšeného napätia. Nemyslí sa tým napätie v napájacom zdroji, ale…
In the field of antenna design, proper adaptation is one of the basic prerequisites for successful operation. Many radio amateurs encounter the problem of switching between…
Harald, DF2WO, will be active again from Burkina Faso under the callsign XT2AW from May 6th to 19th, 2026. In…
The question of antenna system efficiency is one of the oldest and most complex topics in amateur radio. Every operator who has ever stretched and wire between…
An experienced team of operators is heading to Southeast Africa in November to activate Mozambique under the C8K brand. This expedition promises to be and powerful…
Anyone who has ever installed and wire antenna on and tree knows the frustration: throwing weights, pencils, or tennis balls tied to and string,…
Sable Island, with the prefix CY0, is not just an ordinary piece of land in the Atlantic Ocean. This narrow sandy arc, located…
There is an old saying in the amateur radio community that the antenna is the best high-frequency amplifier. You can own and state-of-the-art transceiver with perfect…
and group of experienced operators from Italy announced their ambitious goal for February 2026. Under the call sign 8R1WA, on the 19th…
In the amateur radio community and among DX enthusiasts on shortwave, there is and never-ending search for the holy grail: an antenna that has high…
Members of the Perseverance DX Group (PDXG) and the Western Washington DX Club (WWDXC) have announced the preparation of and team of experienced operators to activate the Tokelau Islands.…
At the turn of 2025 and 2026, the amateur radio community can look forward to attractive DX activity from northern South America. Joergen…
Do you also feel that the newer the TCVR, the less it is interoperable with anything else? Imagine buying…
The amateur radio community has received and significantly improved WebSDR receiver at http://SDR.homeip.net:8901/. After six weeks of intensive modifications and upgrades, Mike stated,…
Why MMANA-GAL Basic in 2025? For radio amateurs dealing with antennas, this is an excellent free antenna modeling tool.…
Do you know the question – how are you, are you broadcasting? I suppose so, this question accompanies every meeting with radio amateur friends. I have to admit…
The 5V7RU expedition, which will take place from November 5 to 19, 2025 in Togo (locator JJ06PD, ITU zone 46, CQ zone 35),…