MFJ MFJ-941E - Page 6

MFJ-941E Versa Tuner II
6
This problem often occurs on 80 meters if an odd quarter-wave (60 to 70 foot) open wire line is used to feed a half-wave
(100 to 140 foot) dipole. The odd quarter-wave line transforms the dipole's low impedance to over three thousand
Ohms at the tuner. This is because the mismatched feedline is an odd multiple of 1/4 wavelength long. The line
inverts (or teeter-totters) the antenna impedance.