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Oznaka: ham radio

W6CCP – The King of Impoliteness

2 Komentara

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 very 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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Remote Controlled Antenna Switch

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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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Koliko snage emitujete?

8 Komentara

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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My First World Castle Award Activation (WCA YU-00023)

2 Komentara

I did my first World Castle Award activation. Although it is mid February, weather forecast was sunny and warm for today, so I planned to go outdoors. As I live very near WCA YU-00023 (Stari grad, Užice) I decided to pack up my gears and walk to the old fortress and make an activation. I was accompanied by a non-ham friend.

YT9TP WCA YU-00023 Activation

As I am preparing for portable operations, this was nice opportunity to check how my equipment behave.

Basically, it is YAESU FT-857 with portable three band linked dipole (80, 40 and 20m), one LiIon 14.4V 5Ah NL202HD battery and another sealed lead acid 12V 7Ah battery. […]
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Universal CAT and programming USB to RS232 TTL interface for ham radio

, 10 Komentara

As soon as I got first two ham radio rigs, I needed to connect them both to PC, to program memories or use CAT control from logging software. I realized that it is impractical to have as many USB to RS323 adapters as rigs.

As serial connection for radio requires just RX, TX and GND lines, and it is the same for most of modern radio stations. It is actually only radio connector that is different – signaling is the same.

It showed up quite easy to build simple multirig adapter. All you need to do is to use existing USB to serial interface adapter, cut it’s cable in two and insert male and female three pin 3.5 mm jack (commonly used as stereo audio connectors). […]
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Radioamaterske frekvencije UHF (432 MHz / 70 cm)

8 Komentara

Plan frekvencija na opsegu 432 MHz

Podopseg Vrsta emisije Dozvoljena snaga
(W)
I kl. II kl.
432.000-432.150 CW 1500 –
432.150-432.500 CW, SSB 1500 50
432.500-432.600 Linearni transponderi (ulaz) 30 30
432.600-432.800 Linearni transponderi (izlaz) – –
432.800-432.990 Radio – farovi – –
432.994-433.381 FM repetitori (prijem) 30 30
433.394-433.581 FM simpleks 30 30
434.000-434.594 Digitalne veze 50 30
434.594-434.981 FM Repetitori (predaja) – –
434.981-438.000 Satelitske veze 75 75

Repetitori

Kanal Stara
oznaka		 Predaja
[MHz]		 Prijem
[MHz]		 Pomak
[MHz]
RU368 RU0 434.600 433.000 -1.600
RU369 RU0X 434.6125 433.0125 -1.600
RU370 RU1 434.625 433.025 -1.600
RU371 RU1X 434.6375 433.0375 -1.600
RU372 RU2 434.650 433.050 -1.600
RU373 RU2X 434.6625 433.0625 -1.600
RU374 RU3 434.675 433.075 -1.600
RU375 RU3X 434.6875 433.0875 -1.600
RU376 RU4 434.700 433.100 -1.600
RU377 RU4X 434.7125 433.1125 -1.600
RU378 RU5 434.725 433.125 -1.600
RU379 RU5X 434.7375 433.1375 -1.600
RU380 RU6 434.750 433.150 -1.600
RU381 RU6X 434.7625 433.1625 -1.600
RU382 RU7 434.775 433.175 -1.600
RU383 RU7X 434.7875 433.1875 -1.600
RU384 RU8 434.800 433.200 -1.600
RU385 RU8X 434.8125 433.2125 -1.600
RU386 RU9 434.825 433.225 -1.600
RU387 434.8375 433.2375 -1.600
RU388 434.850 433.250 -1.600
RU389 434.8625 433.2625 -1.600
RU390 434.875 433.275 -1.600
RU391 434.8875 433.2875 -1.600
RU392 434.900 433.300 -1.600
RU393 434.9125 433.3125 -1.600
RU394 434.925 433.325 -1.600
RU395 434.9375 433.3375 -1.600
RU396 434.950 433.350 -1.600
RU397 434.9625 433.3625 -1.600
RU398 434.975 433.375 -1.600

Simpleksni kanali

Kanal Stara
oznaka		 Frekvencija
[MHz]
U272 SU16 433.400
U273 433.4125
U274 SU17 433.425
U275 433.4375
U276 SU18 433.450
U277 433.4625
U278 SU19 433.475
U279 433.4875
U280 SU20 433.500
U281 433.5125
U282 SU21 433.525
U283 433.5375
U284 SU22 433.550
U285 433.5625
U286 SU23 433.575
U287 433.5875

Listu frekvencija u CSV formatu, koju možete učitati u program Chirp, preuzmite sa https://pedja.supurovic.net/chirp-iaru-r1-repeaters-and-simplex-channel-list […]
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