Amateur Radio by Joosep-Georg Järvemaa
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Slides for presentation about Amateur Radio at Tallinn University of Technology.
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Amateur Radio by Joosep-Georg Järvemaa
- 3. - Legal background- Legal background - Scientific purpose- Scientific purpose - Various interests- Various interests
- 4. An amateur radio station in FinlandAn amateur radio station in Finland Radio Arcala, OH8XRadio Arcala, OH8X Licensed – many dedicated bandsLicensed – many dedicated bands CB – „citizen band“ – 27MHz (11m)CB – „citizen band“ – 27MHz (11m) PMR – 8.37 ch, 446Mhz (70cm)PMR – 8.37 ch, 446Mhz (70cm)
- 5. - Discover waves' behaviour- Discover waves' behaviour - Design radio equipment- Design radio equipment - Test modulations- Test modulations Web interface of Univ. of Twente'sWeb interface of Univ. of Twente's SDRSDR (software-defined radio)(software-defined radio)
- 6. - Contesting- Contesting - DX, DXpeditions- DX, DXpeditions - Just chatting- Just chatting A Dxpedition's QSL-card (contact confirmation card)A Dxpedition's QSL-card (contact confirmation card)
- 7. - A hobby- A hobby - Licensed or free activities- Licensed or free activities - Many aspects- Many aspects A group of Jamaican amateurs on a 'field day' – a radio picnicA group of Jamaican amateurs on a 'field day' – a radio picnic
Editor's Notes
- Good afternoon fellow english enthusiasts! My name is Joosep-Georg Järvemaa and I'm studying telecommunications, first semester. This little presentation is about Amateur Radio.
- Amateur in this context doesn't mean 'inexperienced' but 'recretional'. And 'radio' doesn't mean 'broadcasting' but 'conversation between radio amateurs only'.
- In my presentation I'd like to cover the following aspects of Amateur Radio: * legal background – licensed & free frequencies * scientific purpose – exploring the characteristics of different frequencies and discovering new possibilities for making radio contact * various interests – different approaches and aims of radio amateurs.
- Radio amateurs can operate either by getting a license or using frequencies which use is free for personal purposes. Licensed radio amateurs can operate on numerous frequencies across radio spectrum which are reserved for recretional use – from about one hundred kiloherz up to hundreds of gigaherz. More popular frequencies or bands being 80m (3,5 Mhz), 20m (14Mhz) and 2m (145Mhz). Those who don't wan't to go through licensing procedures but still are eager to make long-distance contacts can opt for citizen band, which is also popular among lorry drivers. And those who just wan't to talk to friends or maybe also to strangers who are in approximate radius of couple of kilometres, can use PMR or Personal Mobile Radio, which could be recognised by it's 8+37 channel indication.
- Secondly the scientific outcome of amateur radio. In history radio amateurs have made many discoveries finding out that frequencies which have considered useless by professionals still could be used for making long-distance contact. Until it became possible to purchase ready-made amateur radio equipment, one had to build their receivers and transmitters by ourselves and many still do. Another field of exploration is inventing and experimenting with new and improved methods of transmitting voice and data signals.
- Next about radio amateurs interests. The most active amateurs could be considered the contesters. Amateur radio contests are mainly about making as much contacts with another contesters as possible in a certain time period. Different contests can last from few hours to few days, some contests also consist of many smaller contests. Another set of well-organised amateurs are DX or distant contact hunters. Some amateurs travel to remote places themselves and make it possible to other amateurs to contact them. And of course – if you like you can also just have a friendly chat with other radio amateurs without any further special interests.
- In conclusion, to underline some key points of amateur radio: -- amateur radio is a recretional activity -- you can either get a license or use frequencies which do not require a license to operate -- and, the hobby has many sides to attract amateurs with different interests.