SR7VC maják opravil Kazimierz SP7CKH. Tento maják sa nachádza v JO91RR a vysiela do antény slot 2 x 10 s výkonom 2,5…
antenna
W3DZZ, G5RV, DK7ZB, G0KSC, DG7YBN,… what do these marks mean? They are KV and VHF antenna designs. The antenna is a decisive factor in reception and transmission, which significantly affects the result. Other types of antennas include quad, parabolic antennas, quagi, K9AY, beverage, slooper, etc. The advantages and disadvantages of each type of antenna can be discussed for a long time.
Efektivita parabolických antén závisí aj od presnosti povrchu paraboly a správneho umiestnenia ožarovača v ohnisku. Za slnečných dní sa ponúka…
Predstavte si situáciu – vyjdete na kopec a potrebujete zistiť, kde je sever. Kompas či buzolu nemáte. Čo spraviť? Siahnite…
Pre výber vhodnej lokality na vkv je dôležitý terénny profil. Akákoľvek prekážka v trase signálu totiž spôsobuje útlm. Veľmi dôležitá…
Contesty ako sú CQ WXP SSB contest sú vždy motorom pre DX expeditions. Ruský tím si to namieril do Botswany,…
Nájsť vhodnú anténu do stiesnených podmienok môže byť skutočne náročný oriešok. Kow, JA0PI, to dokázal. V zástavbe realizoval anténu na…
WSPR challenge je idea Remca PA3FYM a Roba PE1ITR, ktorej princípom je vyhodnotiť schopnosť príjmu WSPR signálov. Tento princíp sa dá…
The company Vertical-array offers the antenna SUPER VERTICAL 80/160 DX AGU for 80/160m and now also 40m. It is a vertical antenna with a height of 22…
What do weather vagaries bring with radio amateur antennas? An example is the hexbeam and other Paľ antennas, OM0ET:
The Es'hail-2 geostationary satellite carrying amateur radio transponders launched from the Kennedy Space Center on Thursday, November 15, 2018 at 20:46 GMT and now…
The QO-100 satellite gained popularity among many radio amateurs and made intercontinental communication available. The designers of the QO-100 satellite transponder ingeniously set...
Anyone who started dealing with SO2R or multi operation with the possibility of working on several bands at the same time encountered the issue of protection...
Radio amateurs who broadcast from intermediate stations know this - the most difficult thing is to build a mast with an antenna. But when it is…
The implementation of a powerful VHF antenna, which one operator - a carrier - transports to the elevation and can build there is a difficult task.
Takýto contestový anténny systém je zrejme snom každého vkv rádioamatéra. Sústavu tvorí: 3 x 8×8 YU1CF (55°, 100°, 145°) 2…
Also in the diaries of many OK and OM stations is the brand 7J4ALL. The answer to why this is so is given by the following video...
The antenna, as the most important element of the radio amateur chain, has a significant impact on the efficiency of operation. There are many ways to measure an antenna. They often…
Dave KJ9I brought the sad news, the world famous KB8RQ Gary Crabtree has left us at the age of 77. Garry had the highest score of 247…
It is a high-gain eight-element antenna with two powered elements and a quadruple reflector. With a boom length of about 480 cm, the antenna has a gain...
Today I want to introduce you to an antenna that impressed me with several features: success (OM9M – MS/EME, racing equipment of TOP stations in...