I haven't had good luck with the no ground antenna. It had great reception and perfect swr but I swear the one I had only transmitted from the coil. I had no range at all. I could hardly get across a parking lot. It would be the perfect setup for an apartment if you could find one that worked though.
Actually they use the length of straight antenna as a reflected ground so it actually does have a ground just not one that you have to connect to anything.
I ran a ungrounded longwire once on 40 meters. It was my first antenna
Every TV in the neighborhood was flashin. I found out when my dad came up to congratulate me on my first morse contact. He had read every word from the Tv flashes.