I've been a teacher for electronics at a professional school in Aachen (western germany) and retired since 2002.
I'm author of books for learning HAM Radio in German language "Amateurfunk-Lehrgang" by VTH-Verlag.
My homepage with free internet course learning HAM-Radio http://dj4uf.de
I've two QTHs, summer (mai-sept) in Aachen, germany, winter (oct-april) in soutern Spain:
DJ4UF in JO30BR, rig: Kenwood TS2000, SB200, 3-el-beam, loop (40/40m) EA5/DJ4UF in JM08BR, rig: YAESU FT-847, hexbeam, magnetic loop (160 m), and KX3 for SOTA.