Just like an SDR preamp, many TV preamps boost across the whole range of VHF/UHF.
High gain in preamps is important if you live way out in the sticks like I do where you don't have any strong signals in the area. You can sort of determine its IP1 and IP3 ratings from the voltage and current it uses and its probably not capable of more than about 10dBm output power and an IP3 of maybe 30-33dBm which is not very high. Looking at its current consumption of 70ma and it works from 7 to 14V, its probably got 5V or even 3V devices inside. Those determine how the amplifier will play in a high RF environment and if it will produce IMD. The noise figure of the KT-200 is very good, the gain is a bit high and they don't publish some of the most important specs like IP1 (1dB compression) and IP3. Testing using an omni directional antenna here for things other than TV, I've measured -20dBm of signal off the antenna and that put into an amplifier with hundreds or thousands of signals and 24dB gain and a low IP1 and IP3 like the KT-200 is a recipe for disaster.īottom line is what works for one person in their neighborhood may not work for you and your neighborhood with high power FM transmitters, paging systems, cell phone towers, etc. Most actually make the picture worse due to the amplifier getting spanked by nearby high power transmitters and the amplifier spews out a spectrum of noise and ghost signals that cover up off air TV signals. I live in RF hell and have never found an off the shelf TV preamp that works here.
Click to expand.The noise figure of the KT-200 is very good, the gain is a bit high and they don't publish some of the most important specs like IP1 (1dB compression) and IP3.
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