Oops, sorry for the double posting. Anti resonance for a free
space dipole is typically in the range of 7000 ohms. The
MFJ 259 is only accurate over a limited range of 5 - 500 ohms
so any measurements of anti-resonance is highly questionable.

According to:
http://ham.srsab.se/ww/temp/test_MFJ269.pdf
ARRL lab measures the range of the MFJ 269 is 6 to 400
ohms. Not sure what the difference is between this and
the MFJ 259.

Frank