I have a 10m dipole in the attic connected to my ic718. Is it possible to tune
it to 20m using the mfj 901b that I have? Does the dipole need to be 20m
length and then tuned down or can tuners tune to a resonance higher than that
of the existing dipole. I do not have a balun on it. On 10m I have an SWR of
1:1

Thanks
73
G. Doughty
KI4BBL