I have a lousy antenna in a good place and now it is time to replace it with a better antenna in that same good place. Which, due to my total lack of knowledge in this area, raises questions that I hope some of you might be able to answer.
I plan to start with a spider. Does the thickness of the wire matter? The internet says yes, but then all the information I found was about transmitting, not about receiving. And no word about frequencies. Would it make any noticeable difference whether I use 1mm or 2mm diametre copper wire? My utterly unscientific gut feeling is that thicker is better, but thicker is also a lot harder to work with.
Naked copper oxidates superficially. With time it gets a greenish cover of “rust”, which blocks oxygen and prevents further inwards oxidation. Does a rusty copper antenna have significantly worse reception than a polished one, or is the difference negligible? If rust matters, would a thin layer of epoxy glue over the wires be better or worse than rust?
The radials of a spider for 1090 MHz are supposed to be ~69 mm long, but is that with or without the horizontal part that gets soldered to the base?
All answers appreciated, even if they raise more new questions than they answer. In fact, especially if they do.