Uzice Award 2017 – YT9TP activation

Skraćena veza: https://pedja.supurovic.net/veza/8901

Beginning of October (1st to 16th) is time of the year when amateur radio operators from Užice participate in celebration of Užice City Day by activating Užice Award.

Užice is old city. It’s first mention in written document is in document found in Ragusan archives, dated October 9th, 1329, almost 700 years ago.  However, city is much older, it was on map of Roman Empire, and archeology found evidence of settlements as early as Neolithic age.

As award manager I have to give good example by participating in award activation. For me that means going portable as I cannot practice ham radio at my home. […]
[ ... vidi ceo članak ... ]

Učenje telegrafije pomoću programa Just Learn Morse Code

Skraćena veza: https://pedja.supurovic.net/veza/8821

Just Learn Morse Code je program koji omogućava učenje Morzeove telegrafije uz pomoć računara. Kao i drugi programi ove vrste, otprema znakove po Koch metodu ali se može podesiti da radi po drugim metodama pa i onom koji je kod nas uobičajen (JNA). Omogućava otpremu telegrafije Farnsworth brzinama (podešavanje različite brzine otpreme znaka od otpreme teksta).

Program je veoma prilagodljiv i zaista je dobar alat za učenje telegrafije, kako grupno tako i samostalno. Osim uobičajenog učenja slova, brojeva i znakova interpunkcije može se unositi proizvoljan niz znakova za vežbanje, može se učitati unapred pripremljeni tekst iz datoteke, a program ima ugrađene i opcije otpremanja reči, skraćenica i Q kodova što je vrlo korisno kao priprema za održavanje radio-veza. […]
[ ... vidi ceo članak ... ]

Učenje telegrafije pomoću programa Teach Morse New

Skraćena veza: https://pedja.supurovic.net/veza/8812

Teach Morse New je program koji omogućava samostalno učenje prijema Morzeovog telegrafskog koda. Otprema znakove po Howard ili Koch metodu po izboru i omogućava otpremu telegrafije Farnsworth brzinama (podešavanje različite brzine otpreme znaka od otpreme teksta).

Program je zanimljiv je zato što prati napredak i prilagođava vežbe mogućnostima osobe koja se obučava, a kako učenik upotrebljava tastaturu za unos primljenih znakova tako uči i upotrebu tastature računara za prijem Morzeove telegrafije što je itekako korisno.

Pored računara i ovog programa nije vam potrebno ništa drugo za vežbanje. Dobro je imati slušalice ali nije neophodno.

Podešavanje programa

Nakon pokretanja program prikazuje glavni prozor u kome se sve dešava: polje u kome se ispisuju primljen znaci, podešavanje brzine optreme, dugmad za pokretanje i završetak vežbe, izbor metoda učenja i grafički prikaz napretka u učenju. […]
[ ... vidi ceo članak ... ]

Spiderpole 12m anchoring construction

Skraćena veza: https://pedja.supurovic.net/veza/8741

Spiderpole 12m made by Spiderbeam is very useful for portable ham radio activities. To do the job it must be properly anchored. This pole may be anchored at the bottom (at about height of the first element) which allows it to withstand wind speed of abut 80 km/h, and at 7 meters high using guying lines (as recommended by manufacturer) which allows surviving windows of 120 km/h.

Anchoring at the bottom seems not suitable for portable, as it requires either to have already set strong short pole (fence or something) to attach pole, or dig one into the ground. […]
[ ... vidi ceo članak ... ]

Dunax GPN-4B antenna construction details

Skraćena veza: https://pedja.supurovic.net/veza/8733

After few years of sitting on top of my apartment building I decided to bring my Dunax GPN-4B antenna down for repair as top capacitive hat was broken. I found out that there actually no technical details about fixing it. So I went through some work of gathering such information.

First I found out that manufacturer is out of business. Antenna is not in production any more and manufacturer site is down. I asked help from fellow hams, some sent me some info they had, some sent me contact info for manufacturer.I also used my own antenna to take measurements, so finally I got quite complete details that I believe could help other fellow hams trying to repair their own antennas but also ones that want to build similar antenna. […]
[ ... vidi ceo članak ... ]

Build grid dip meter adapter coil for antenna analyzer

Skraćena veza: https://pedja.supurovic.net/veza/8706

Antenna analyzer like MFJ-259, MFJ-225, MiniVNA and similar may be used as simple grid dip meter for measuring coils, traps and capacitors. All you need is grid dip meter adapter coil which you may buy (costs for MFJ adapter set is about 30 USD) or make it by yourself for few USD.

If you want to build on your own here are dimensions of original coils sold by MFJ.

Small coil for short wave frequencies: coil diameter 15mm, coil length 15mm, 30 turns of 0.5 mm copper wire wound on PVC tube. Coil inductance should be about 3.6μH. […]
[ ... vidi ceo članak ... ]