Exact item shown, from decommissioned ground station equipment - MiniCircuits ZHL-1A, tested - see plots from network analyzer, I tested both, one plot is from each one, I just expanded the scale for the second plot. After posting this, I acquired 3 more, two without heat skinks.I've tested them all. The performance is good across more than the minimum specified bandwidth as you can see. Coaxial amplifier, 50 Medium High Power SMA connectors. Wideband, 2 to 500 MHz. High IP3, +38 dBm typ. Medium high power, +28 dBm min. Check out my other items. The item "Mini-Circuits ZHL-1A Power Amplifier 2 to 500 MHz Output +28dBm 630mW tested SMA" is in sale since Saturday, October 12, 2019. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Signal Sources & Conditioning\RF & Microwave Amplifiers". The seller is "william_b_noble" and is located in Santa Monica, California. This item can be shipped worldwide.