Bill, The loop is a nominal 1.9 +j215 at 137 kHz, going to 1.8 in the winter, and about 2.05 in the summer. It definitely can't be analyzed as a small loop at 505 kHz, but it's hardly big enough to have lobes in odd directions. I'm guessing that the LF nulls will be filled in, and that the pattern will be more circular. JA