Harry Balster
Instrument Engineer Radboud Radio Lab 
Radboud University Nijmegen
Faculty of Science
Huygens building,
Heijendaalseweg 135,
6525 AJ Nijmegen,
Department of Astrophysics
P.O.box 9010,
6500 GL Nijmegen
Tel:+31-24-3652844
Fax: +31-24-3652807
Email: H. Balster at science.ru.nl