Feasibility of indoor antenna?

It's not much help but all you can do is try an indoor antenna. There are a lot of folks who have very good luck with indoors but it all depends on what's around you (other buildings, trees, wall material, etc). TVFool is supposed to be more reliable than antennaweb so I'd use their recommendations. Ideally, a roof-top antenna is your best bet but that sounds like it's not possible in your situation.

Clearstream 1 or 2, DB2, 4220, Terk HDTVi/HDTVa, or Mohu are antennas that I have found to work well indoors. They are good versions of basic antenna designs. Other indoor antennas are gimmicky and overpriced, and often produce poor results. But if you are in a good signal area, the basic rabbit ears/loop from RadioShack does work good as well.

I started out with radio shack rabbit ears and it worked quite well for the money. I am in a condo facing south and most of my channels are northeast about 20 miles and I can get almost all of them.

You're somewhat lucky in the sense that in order to get the big 4 networks, you only need to be able to receive two stations - WLIO/channel 8, which, according to Wikipedia, has NBC in HD and Fox in SD, and WOHL/channel 35, airing both ABC and CBS in HD. Just entering your zip code into TV Fool, you look to be close enough to those stations, as well as the PBS station WBGU to the north, that an indoor antenna would be feasible, though, as mentioned, there may be obstacles at your specific location that hinder you. Additionally, and completely out of your control, one of the stations you need to pick up is on the VHF band, and VHF digital stations do not have a good record of working with indoor antennas as well as UHF signals.

Still, I'd throw in another recommendation for the Terk HDTVa antenna. The one I have has had few problems in two different cities/houses in picking up VHF and UHF signals from up to 45 miles away. The only downside is that the cable attached to the antenna is rather short, and since the best results for this, and really any, indoor antenna, is to have the antenna as far away from the TV as possible, you may need to buy some extra coaxial cable and a female-female connector. Fortunately, both are cheap.

FWIW, you might find a comparatively "flat" outdoor-type antenna with nice, long elements to pick up your VHF station and enough uhf elements to match any indoor antenna for that band. I could almost get consistent reception indoors in Ft. Myers, FL with a Terk HDTVi, but replaced it with an Antennacraft AC-9, stuck on top of a tall cabinet back in a corner (so the long elements in back were extended only to a 90 degree angle, not straight out), high enough no one would poke his eye out on an element. It solved the last of the reception problems there, and cost just 20 bucks before S&H.

It might. Or might not. For example, typically the larger an antenna is, the more gain it has. It is also more directional. So, a larger antenna might not pick up stations off axis from the direction it is aimed. Additionally, preamps are prone to overload. If there are any strong local signals in the path of the antenna, the preamp may over-amplify the signal, resulting in worse reception.

Go ahead and post your TVFool link. The address will truncate, but we can determine the complete URL. For your pricacy, your address will not display on the results page.