I saw this video by PY1AHD about his Magnetic Loop antenna. Very niced and well done. I was searching for a magnetic loop antenna, because it seems to works well as a stealth antenna. Look at the website of KR1ST, Alex Krist, previous PE1MBI about his experience with a magnetic loop and QRP.
This afternoon I worked OE7EHH, Hans from Rattenberg, Austria on 40 meter with CW.