single turn loop v multi turn loop

[tvdxrools]

been doing a few tests with a single turn loop against my multi turn loop you can hear the difference here
http://www.youtube.com/watch?v=Kociy23DBuk
thanks david h
ayrshire scotland

[AS-400 SL1]

Please could you tell me how did you build the balun for this antenna

thanks

german (spain)