Hi all,
for one who is interested in getting more practical information, there is a URL:

http://www.qsl.net/iz7ath/web/home_eng.htm

where you can find some hints to build this antenna for 160 m. And furthermore 
a lot of results in doing qsos with this type of lowband-antenna. Talino 
(iz7ath) suggests 6m long cylindres/2m diameter for 137 kHz. If the loss of 
efficiency will be abt. 10dB  compared to a fullsize-dipol(measured at 1.8MHz!) 
then it would be a hope for all lowfers with large aereas and tolerant 
neighborhood :-))
73 Bernd, DF8ZR