If you've ever wondered whether or not you need a preamp on your TV antenna, wonder no more! In this post, we'll explore the answer to that question and help you determine if a preamp is right for your needs. TV antennas are designed to receive signals from broadcast towers and amplify them so that they can be received by your television. In order to do this, antennas use what's called a low-noise amplifier (LNA). LNAs amplify the signal without adding any noise of their own, which is why they're ideal for use with antennas. However, there are some situations where an LNA may not be enough to get the job done. If you live in an area with weak TV signals, or if your antenna is located far from the nearest broadcast tower, you may need to use a preamp.