The common auto AM/FM antenna these days is a *roughly* 1/4 wave (for FM)
31" vertical whip. For the sake of AM reception (particularly distant
cities, sky wave at night) iwould it hellp to use a longer whip, and would
there be any benefit (or detriment) to FM to making "longer" = ~60" (~1/2
wave) or perhaps ~75" (~5/8 wave) vs some other random length (say 90" or
even102") or does it not really matter as it is only receiving not
x-mitting. I'm assuming for AM that more is better (with obvious practical
limitations, probably well below the hypothetical 102" previously sited). I
suppose the best thing would be to just try a 5' or 6' whip some night, but
thought I'd ask.