as I found that lot of guys still has no clear idea how to make the transformers (the most important part) for receiving antennas like Flag, Pennant, Delta, K9AY, EWE etc. I decided to put some links to articles about that.
http://www.w8ji.com/k9ay_flag_pennant_ewe.htm - famous pages from Tom, W8JI where You can read more details about the terminated loops incl. the transformers construction details.
http://w7iuv.com/flag.htm - very complex informations about the rotable Flag receiving loop by Larry, W7IUV incl. pre-amplifiers etc.
http://www.qsl.net/wa1ion/flag/flag_antenna.htm - very good pages about Flag construction by Mark, WA1ION.
http://www.hard-core-dx.com/nordicdx/antenna/loop/flag/index.html - summary information about the Flag and Pennants and some links to related pages.
More informations about detailed construction of rotable Delta terminated loop incl. the 1:18 (1:16) transformer, support, termination etc. will come soon over here.
73, Petr OK1RP