Na blog su postavljene nove verzije radio-amaterskih priručnika:
Priručnik za radio-amatere operatore treće klase – PROPISI (verzija 0.11).
Priručnik za radio-amatere operatore treće klase – SAOBRAĆAJ (verzija 0.15).
Kategorija: Telekomunikacije
For this year World Castle Weekend I activated Old fortress in Uzice (WCA YU-00023, JN93VU, WAS ST03) using my call sign YT9TP/P. Again. Activation was not announced, as usual, and served as surprise for fellow hams chasing WCA points. I had great help from Goran YU4RAA who participated in antenna and station setup.
Weather prognosis was not ideal. It was expected to have some showers which reduced our options of station location. Instead of setting it on top of fortress which would provide high point and lot of clear space, and no protection from bad weather, we decided to go safer way and settle at only space that can be used as shelter. […]
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My idea was to be able to use this to charge Baofeng radio in various power conditions including in my car and this voltage was a problem. I noticed comments that charger should not be connected to higher voltage than 10 Volts. So I modded charger to fit higher voltage.
Iron Powder Toroid Cores part numbers are presented using format Tddd-m where dd is core diameter in tenths of inch and m is material grade. Also, cores are color coded to represent material grade.
Material grade defines frequency range core may be used for. There is no strict standard for coding but for informal purpose this table can be used.
| Material code |
Color | Frequency range |
| 0 | Tan/Tan | 50 MHz – 350 MHz |
| 1 | Blue/Clear | 150 kHz – 3 MHz |
| 2 | Red/Clear | 250 kHz – 10 Mhz |
| 3 | Gray/Clear | 20 kHz – 1 MHz |
| 4 | Blue/White | 3 MHz – 40 MHz |
| 6 | Yellow /Clear | 3 MHz – 40 MHz |
| 7 | White/Clear | 1 MHz – 25 MHz |
| 8 | Orange/Clear | 20 kHz – 1 MHz |
| 10 | Black/Clear | 15 MHz – 100 MHz |
| 12 | Green/White | 30 MHz – 250 MHz |
| 15 | Red/White | 150 kHz – 3 MHz |
| 17 | Blue/Yellow | 20 MHz – 200 MHz |
| 42 | Blue/Red | 30 kHz – 80 kHz |
U poslednje vreme je ponuda Cloud servisa postala velika. Skoro svaka firma koja nudi internet servise ima u ponudi i neku vrstu Cloud usluge.
Šta je Cloud?
Ideja je jednostavna i veoma zanimljiva. Svi mi imamo jedan veliki problem: sve je više podataka na našim računarima a neophodno je da ih čuvamo na način koji je siguran i jednostavan. Ako vam je bar jednom „pukao hard disk“ sigurno umete da cenite značaj rezervnih kopija podataka.
Cloud servis omogućava da podatke držite na nekom udaljenom serveru, kome pristupate preko Interneta. Praktično kao da imate spoljašnji tvrdi disk, samo što se on ne nalazi kod vas nego negde daleko, na sigurnom. […]
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Radio-amateri su jedini civilni korisnici radio-frekvencija kojima su frekvencije dodeljene na korišćenje besplatno. Frekvencije su im dodeljene u celom radio-spektru što omogućava eksperimentisanje i istraživanje u oblasti prostiranja radio-talasa.
Za potrebe obuke i pripremu za polaganje stručnih ispita za radio-amatere, pripremio sam, pregled radio-amaterskih frekvencija (). U njemu se nalaze naznačeni radio-amaterski opsezi, podopsezi namenjen za određene vrste rada i naznake koje podopsege mogu da upotrebljavaju radio-amateri prve, druge i treće klase.
U propratnom tekstu dato je i objašnjenje označavanja vrsta rada.
Preuzmite . Dokument je u PDF formatu. […]
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