POVZETEK
Številni med sabo neodvisni tehnološki dosežki zadnjih nekaj let omogočajo, da je resna radioastronomija ponovno dostopna amaterskim astronomom. Za inženirja je lahko amaterska radioastronomija velik izziv. Postopek izgradnje zahteva širok nabor znanj: poznavanje elektronike, programiranja, obdelave podatkov, astronomije ter na zadnje fizikalne interpretacije podatkov. Radioteleskop je naprava za merjenje moči, spektra in polarizacije elektromagnetnega valovanja. Radijski signali so šibkejši kot vidna svetloba in radijsko opazovanje zahteva drugačna znanja kot optično opazovanje. V sklopu predavanja si bomo ogledali postopek načrtovanja radijskega teleskopa za opazovanje vodikove črte in pulzarja B0329+54. Rezultati naših meritev so: spekter atomarnega vodika v izbranih smereh in 3D zemljevid (galaktična dolžina, galaktična širina in profil hitrosti Rimske ceste, ki je vidna iz naših krajev) ter prikaz pulza in predhodnika pulza pulzarja B0329+54.

ABSTRACT
Amateur radio-astronomy as engineering challenge
Many different technological achievements in the last years bring serious radio-astronomy back within reach of amateur astronomers. Amateur radio-astronomy can represent a big engineering challenge. Building a radio telescope requires a broad knowledge including electronics, programming, data processing astronomy and last but not least physical data interpretation. A radio-telescope is a device that measures the power, spectrum and polarization of electromagnetic (radio) waves. Radio signals (radiated by celestial sources) are weaker than visible light. Radio observations require different knowledge and equipment from optical observations. In this lecture the design of a suitable radio-telescope for hydrogen-line and pulsar observations will be presented. The results of our observations are: the atomic-hydrogen spectrum in selected directions and a 3D map (galactic longitude, galactic latitude and relative velocity profile of our Milky Way galaxy as visible form our latitude) and the pulse analysis of pulsar B0329+54 including the main pulse, leading and trailing sub-pulses.