You can also start testing with indoor antenna. I have two receivers, one is still using the 10-15cm (4-6") whip antenna that came with the DVB-T stick, and this can get messages up to almost 90nm. Standard ~1m cable from the antenna. This antenna is by the window facing north, and the building is an old industrial garage that has metal sheets in outer walls and roof, and not too many windows. Fairly close to faraday cage I believe, I can get only very poor FM radio (88-108MHz here) reception indoors, have to use net radios for backgound “noise” when I work with my off-road trucks. Cannot get any GPS coverage indoors at all, and I have pretty good GPS receivers (sifr star IV chips in those) in both trucks places in the roof and hood, those can see 10 or so satellites most of the time when outdoors even in the woods.
The other receiver is at home, I was getting only very few planes with the 10-15cm (4-6") whip antenna that came with the DVB-T stick, bit te antenna was nest to the servers under a table almost buried with cables (ethernet, serial, USB, SATA, etc.). So I made a simple one like this: antirez.com/news/46. Now I get fairly good reception, up to almost 60mn with 2m (TV antenna) cable from the antenna. This antenna is placed about 2m high, just a few innches from the inner roof, against the outer wall.
But I just turn green when other folks report 200-300mn distances, so I’m going also for outdoor antennas next summer, now the roofs are far too slippery for safe antenna installations.
This forum has several different antenna designs, I just hope someone (preferably in a location with a lot of planes in every direction, and this pretty much excludes me) could to a proper test comparing different DIY antennas both indoor and outdoor locations, optionally testing different heights for the outdoor antennas (maybe with just a couple of antennas to keep the effort reasonable).