Roy Lewallen wrote in
treetonline:
....
the feedpoint. Shielded loops have been discussed at great length on
this newsgroup (not because they're complicated, but because they're
impossible to understand until a person is willing to let go of some
common misconceptions). Anyone interested in these can find the
....

Sadly, some of the misconceptions are propagated in ARRL publications. It
is understandable that people have the wrong idea!

Owen