Teme: Radio-amaterizam

WCW2014 – World Castles Weekend in Uzice, Serbia

It was just several days before this year world Castle Weekend that I decided to participate by activating one of the fortresses in surroundings of my hometown Užice. Actually, I was targeted to activate YU-0030, Fortress of Solotnik, as it was never activated before and thus should be more interesting for WCA hunters.

wca-yu-00023-2014-06-14-01

As I still did not have all necessary equipment and tools I asked for a help of Milan YU1ZZ. As experienced contester he was up to the task, ready to improvise if necessary. One short phone call settled it down. Milan is primarily high class contester and DXer, but it seemed to me that he is actually seeking for something fresh and more relaxing, and he was really interested in my previous activation of Old fortress in Uzice (YU-00023). […]
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Teme: Radio-amaterizam

Ham Silouethes

ham-silouethes-02-pedja.supurovic

Serbian ham radio portable expedition captured on Zlatibor, Karaula, VHF contesting in bad weather. […]
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Teme: Internet svet

Google smarač

Otkako sam, pre nekog vremena, preselio domen sa guglovog na drugi registar, tako je počelo smaranje i zastrašivanje putem imejla.

Do sada su najbolje bile poruke kojima su me opominjali da treba da im platim za produženje registracije domena, što je van pameti, jer domen je na drugom registru i, naravno, da je plaćeno sve što treba.

Ipak, uspeli su da sami sebe prevaziđu. Danas mi je stiglo ovo:

google bullying

Šta reći, kakvu poruku poslati? Možda da napišem članak o tome zašto sam preselio domen na drugi registar?

Možda bih ovo mogao da upotrebim kao dokaz da posedujem najstariji registrovani domen, registro nego što su domeni i izmišljeni? […]
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Teme: Događaji | Užice

Put kroz klisuru reke Đetinje u prekidu

Skorašnje bujice su odnele danak. Put koji od Užica vodi klisurom reke Đetinje do brane Vrutci je u prekidu. Prelaz preko reke, neposredno ispod brane je reka odnela.

Znajući koliko je tu bilo betonskih cevi pritisnutih ogromnim stenama koje je sve voda odnela, mogu samo da zamislim kakva je to sila bila.

 […]
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Teme: Mesta | Slike iz prirode | Fotografija

Jutro na Kokinom Brodu

Jutro na Kokinom Brodu

Nekad se baš isplati ustati rano […]
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Teme: Radio-amaterizam

W6CCP – The King of Impoliteness

Today just past 17:00 UTC at 14214 kHz I witnessed behavior of  ham radio operator W6CCP that was as rude as it could get.

Saddiq A41KJ was on the frequency calling CQ, and had big pile-up from European stations. He was called all over but handling situation nicely and getting through the list of stations calling him.

Then, out from nowhere, W6CCP came out, obviously with high power, screaming on top of all other callers for Saddiq to turn to long pass to North America. He was so powerful that he out-called all stations in pile-up. He gave fine report for A41KJ but insisted for him to turn to long pass. […]
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Teme: Radio-amaterizam | Samogradnja

Remote Controlled Antenna Switch

Antenna switch in a stack

Remote controller for antenna switch in a stack

As I live in apartment building I have apparent problem with setting up ham radio antenna. The obvious place to set up antenna was the roof as it  is easily accessible. Due to small space and me not wanting to make mess of a wires, I decided to use compromise vertical multiband. A friend had spare DunaX-GPN4B (40, 20, 15 and 10m) so it was obvious choice. I had to put down about 30m of coax cable to my apartment, and soon I was in the air.

Not for long I found out that I do miss 80 meter band a lot. […]
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Teme: Radio-amaterizam

Koliko snage emitujete?

Nepresušna tema u radio-amaterskim razgovorima je snaga radio-stanica. Ma koliko da je imamo, to nikada nije dovoljno. Uvek su na ceni jače radio-stanice, a mnogi radio-amateri ne smatraju svoju opremu zaokruženom ako ne nabave neki pojačavač snage.

Interesantno je da je prvi korak u povećanju dometa obično povećanje snage predajnika. Nažalost to ume da ode i dotle da se izlazi iz okvira propisa i emituje snagama koje su daleko veće nego što je to dozvoljeno, a da rezultati ne budu baš odgovarajući.

Mnogi su se uverili da prosto povećanje snage ne da nije uvek nego često uopšte i nije rešenje.

Snaga predajnika
(W)
Dobit antene
(dB)
Efektivno izračena snaga
(W)
100 1 125
100 2 160
100 3 200
100 4 250
100 5 315
100 6 400
100 7 500
100 8 630
100 9 800
100 10 1000
100 11 1250
100 12 1600
100 13 2000
100 14 2500
100 15 3200
100 16 4000
100 17 5100
100 18 6300
100 19 8000
100 20 10000

Pre nego što se okrenete povećanju snage trebalo bi da se pozabavite sa tri bitna faktora: dobiti antene, usmerenosti antene i lokacijom gde se antena nalazi. […]
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