als vlinders in de nacht sidney sheldon 382 blz€ 3,50
Radio auroras charlie newton g2fkz
€ 5,00
Enlèvement ou Envoi
370depuis 16 mai. '23, 12:09
Caractéristiques
ÉtatComme neuf
Description
Radio auroras charlie newton g2fkz during the late 1940s, scottish and scandinavian radioamateurs were among the first to notice the strange hissingsteam cw signals emanating from the north during the northern lights. As powerful fm broadcasting was introduced in the 1950s, it was found that long-distance (dx) reception of these stations was possible via the aurora. Soon radio amateurs were using auroras for two-way contacts, to the astonishment of the professionals engaged in atmospheric research, and later on were able to make a significant scientifie contribution to our understanding of this fascinating phenomenon. Radio auroras tells that story, one of which radio amateurs can be proud, and goes on to give a readable account of how auroras are caused, how they can be forecast, and how best to use them to work dx. Ah those interested in the experimental side of radio propagation will welcome this unique guide. Charlie newton, g2fkz, a member of the rsgb propagation studies committee, has been involved in research in this field for over 30 years and is currcntly the auroral coördinator for the international amateur radio union. Fixed price: 5euro weight:250 grammes
Numéro de l'annonce: m1978744204
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