i have about a foot and half of rg58 with no ends. whats the best way to measure at the base of an antenna? can i use a reallly short piece of the rg58 say about 6 inches to test my antennas with?
At VHF a double-male connector might
be short enough, but probably not at UHF.
In that case, try adjusting the antenna length, radial lengths, radial tilt angle, etc. for minimum
SWR. In the end, that is what will make the reactance term disappear, because when the antenna
matches 50 ohms there won't be any reactance. In the end, low SWR is what matters (though
you're approaching the point where you won't see any improvement in performance as you lower
If you want to know what is actually happening at the antenna, correct your readings for the
coax length using TLDetails or a similar program, or from a Smith Chart, etc.