Total posts : 45366
These types of FS meters, where low power is concerned, need to be used a few feet from the radiator … IOW, it won’t be getting much interference from stations which are not on the same frequency for which you are testing, and you surely wouldn’t be broadcasting on an occupied frequency, would you?
But, yep, a tunable FS meter would be the sure way. In my case, I used a rock-simple coil/germanium diode/cap/resistor circuit with a telescopic antenna, to which I att’d my multimeter, which is very sensitive and reads mv out to 3 places. Still took me hours up-and-down the ladder to get it to peak, but it’s been golden since then.
It’s 11:00pm here, and I’m still getting a very useful signal most places in my small town.