I have a couple channels that hover around 60% signal strength but 95 to 100% quality...right on the line of becoming unwatchable. They are very touchy to any interference, and often do become so glitched out can't watch them.
These are channels whos transmitter is farest from me, over 40 miles.
All my other OTA stations towers are less than 10 miles, and several are less than 5 miles.
So, if i use an amp with my HDHR, yes, it makes the couple weak stations come in stronger and be more stable, but it causes all the other stations, that were all ready 100% or very very near to be come over amped and they breakup and have issues...so I don't use a amp, only a LTE and a low pass filter on my coax line.
I use Locast for those couple stations that the antenna can not get well.
I can not use outdoor antenna, because i live in an apartment complex, so have a Mohou Ranger flat rubber antenna mounted above my window inside that works very well.
A properly installed and positioned outdoor antenna most always will get you better signal reception, but it all depends on your immediate surrounds. Lots of large trees, or a large tall building, or any obstructions etc.
Depending on how long the coax run from antenna to end point may be needed, then that may be a use case for a pre-amp at the antenna, say like if you needed to make it more than 150ft+, i forget the length at which coax starts to loose db.
Very important an outdoor antenna is properly grounded, as it will act as a lightening rod.

