Universal CAT and programming USB to serial TTL interface for ham radio

Skraćena veza: https://pedja.supurovic.net/veza/9536

Some years ago I posted article describing Universal CAT and programming USB to RS232 TTL interface for ham radio that I made.

Here is small update, adapter for YAESU FT-8900, FT-8800 and alike radios.

FT-8900 and FT-8800 and some other Yaesu radios use two wire interface. One wire is ground and other is both RX and TX. This is also known as CIV-I interface used in Icom radios.

CIV-I interface is quite simple. There is a diode (universal like 1N14148) connecting RX and TX, oriented cathode toward TX, with one 10K pull up resistor to 5V on RX. […]
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Vectronics PM-30 SWR/Power Meter User Manual and Schematics

Skraćena veza: https://pedja.supurovic.net/veza/9510

I’ve got second hand Vectronics PM-30 SWR/Power Meter and found out very little information about it on Internet. I’ve prepared Manual and Schematics from paper documentation I got with it.

If someone needs it, here is download: Vectronics PM 30 pwr swr meter manual and schematics

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Vežbajte otpremanje Morzeove telegrafije samo sa ručicom i računarom

Skraćena veza: https://pedja.supurovic.net/veza/9225

Za usavršavanje tehnike otpremanja Morzeove telegrafije potrebno je odvojiti dosta vremena za vežbanje. Zgodno je ako to možete da radite kad god imate vremena.

Za to su vam potrebni ručni taster ili ručica i tonski generator. Taster i ručica se nabave (svaki radio-amater valjda to već ima) a kao tonski generator se obično koristi radio-stanica ili, ko se bavi elektronikom, može i da napravi.

Međutim, ako imate računar, on može takođe da završi posao. Postoji nekoliko programa koji rade kao tonski generatori a taster i ručicu na računar povezujete preko serijskog priključka na računaru.

MorseKeyer je jedan od takvih programa. […]
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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. […]
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Better Syncing Windows With Atomic Time Server

Skraćena veza: https://pedja.supurovic.net/veza/8659

You may have need to have accurate time on your Windows PC. Windows already does have support for network time server synchronization and with recent versions ti should be set and turned on by default meaning if PC has access to Internet it will synchronize its internal clock with some of the world atomic clocks.

However, it might be good enough as synchronization is set to rather infrequent time periods, one day or even whole week. For some purposes it is needed to have clock synchronized more frequently. I need it for working Amateur Radio digital modes.

There are number of third party applications that can be installed on Windows PC as SysTray applications or services and allow more precise time synchronization. […]
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Radio Amateurs in War

Skraćena veza: https://pedja.supurovic.net/veza/8628

March 24th. Year 1999. The very end of the 20th Century. With the nightfall strange sounds were heard in the sky and at 19:45 – explosions. Bomb fell on Yugoslavia, small sovereign country in Central Europe.

One word is on everyone mind – WAR!

Yugoslavia was attacked by NATO military alliance led by United States of America, the country Yugoslav people always considered as one of the best friends. At first, people were fighting mixed feelings caused by unjustly accusations, vicious attacks and betrayal of considered friendly and ally countries and disbelieve that what happens is at all possible as that was act against international law. […]
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