79. obletnica uradnega pričetka delovanja Radia Ljubljana

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79. obletnica uradnega pričetka delovanja Radia Ljubljana

OdgovorNapisal/-a S51AG » 28 Okt 2007, 12:44

Spoštovane kolegice in kolegi radioamaterji,

danes mineva 79 let od uradnega pričetka delovanja Radia Ljubljana.
Radio Ljubljana, ki je sicer pričel redno oddajati že 1. septembra 1928 je bila druga radiodifuzna radijska postaja v stari Jugoslaviji. Dobri dve leti poprej je pričel oddajti Radio Zagreb.

V počastitev tega praznika sem se potrudil v svojem arhivu izbrskati staro revijo Radiowelt, ki ga je izdajala Avstrijska zveza radioklubov. V številki 37. letnika 1928 je bil objavljen članek prof. dr. Lončara iz Zagreba o pričetku delovanja Radia Ljubljana. Članek lahko preberete na naslednji povezavi:

Slika


In še kratki povezetek članka:

Oddajnik Radia Ljubljana, ki je dosegal izhodno moč 2,5 kW na prvotni valovni dolžini 566 m (= 530 kHz) je bil postavljen na lokaciji v vasi Domžale ter je bil za tiste čase zgrajen izredno sodobno oz. po vzoru enega najsodobnejših oddajnikov v Nemčiji. Antenski sistem v obliki črke T je bil postavljen na dveh stebrih višine 120 m in medsebojne razdalje 200 m. Antena je bila dolga 87 m. Anodna napetost oddajnika 10.000 kV je znašala 10 kV, celotni postroj pa se je napajal iz dieselskega genraterja nazivne napetosti 380 V. Hlajenje umernikov in izhodne stopnje oddajnika je bilo vodno. Modulacija oddajnika je potekala daljinsko, program oddajnika pa je bilo moč sprejemati na področju Ljubljane tudi z detektorskimi sprejemniki, hkrati pa oddajnik zaradi oddaljenosti od mesta ni motil sprejema ostalih radiodifuznih postaj. Z oddajnikom je upravljala Prosvetna zveza, sam oddajnik pa je bil v lasti države. V okolici oddajnika je bilo 2.000 naročnikov na program, država pa je obljubila odvajanje 60 % naročnin oddajniku.

Lep pozdrav,

Tono, S51AG
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Re: 79. obletnica uradnega pričetka delovanja Radia Ljubljan

OdgovorNapisal/-a s57ad » 28 Okt 2007, 13:48

Članek seveda ne govori o tem, da je glavni projektant Radia Ljubljane bil prof. Mario Osana iz Ljubljane, vodilni strokovnjak za elektroniko, posebno za oddajno tehniko v tedanji Jugoslaviji ter (če me spomin ne vara), prvi predsednik ilegalne URAJ (Udruženje Radio Amatera Jugoslavije).
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OdgovorNapisal/-a s57ad » 29 Okt 2007, 19:10

Na linku: http://www.posta.si/Namizje.aspx?tabid= ... kelid=6630

sem našel še naslednje besedilo:

Radio Cuckoo

Radio as a public service of propagating culture, news, entertainment and public education appeared in Europe in 1922. In Slovenia the beginning of the radio is closely related to the name of a Slovene from Trieste - Mario Osana (18 June 1880 - 10 December 1958), an engineer and professor, who made first experiments already as a Post Office employee in March 1925. He broadcasted from the Post directorate in Ljubljana with a transmitter, which he made himself.
In the period following World War I postal administrations mostly bought telegraph transmitters for the establishment of their communication. Thanks to the far-sightedness of Mr. Osana, who changed the original order for the first telegraph station in Ljubljana to an order for a radiophone station, the technical basis for construction of the first radio transmitter in Domžale in 1928 and for the broadcast of the first Slovenian radio programme was provided. Programming concession was in the first years given to "Prosvetna zveza" (Educational Association) and the station was technically led by Mr. Osana.
In that time every radio station had to use a certain pause signal for the purpose of identification and during breaks. For this purpose Mr. Osana wittily selected the cuckoo song for the Ljubljana radio station. In Slovenia cuckoo represents a harbinger of spring and thus the sign "cuckoo - cuckoo" symbolically meant that the radio spring came to Slovenia. Enthusiasm that was aroused by the appearance of the first Slovenian radio and the radio cuckoo was best captured in the speech given by the writer Fran Saleški Finžgar during the opening of the radio station on 1 September 1928 when he said that that day was the feast of the Slovene word. A great feast, even though celebrated quietly, a feast that the Slovene word had never seen before. It spanned its wings for the first time to fly from Ljubljana, from the heart of the Slovenian nation, across the mountains, rivers and fields to all fellow countrymen at home and abroad, to all Slavic brothers and to all nations in Europe and further on...
As a sign of the Slovenian radio station the "cuckoo" represented something special in Europe and it aroused a lot attention among its listeners. For the reproduction of a "cuckoo" sign a special electromechanical device was made which was quite complicated for those times. Mr. Osana thought that visitors to the radio station should actually see the cuckoo and so he instructed his colleague, Mr. Jenko, to get him a stuffed cuckoo from Mr. Herford, a hunter and preparator from Ljubljana. Mr. Jenko brought him the stuffed bird which was placed between the window panes in the studio and equipped it with glass eyes which lit up when it sang.
The original choice of the cuckoo song has remained the characteristic sign of Radio Ljubljana (now Radio Slovenia) right up to today as we celebrate the 70th anniversary of the public radio in Slovenia.
Jože Mastnak
RTV Slovenia
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