SpinCore PA15W RF Power Amplifiers . The PA15W RF power amplifier is a very compact broadband module capable of delivering more than 15 watts into a 50-ohm load. It has a 3 dB range of 4 MHz to 100 MHz and is powered by a DC +25 V power supply. The power amplifier has standard female SMA jacks for RF input and output, and a row of screw terminal connectors for the input DC power. It typically operates in Class AB. The entire product comes in a very small form factor measuring 2.5" x 2.75" x 3.0" (63 mm x 70 mm x 76 mm).
4 MHz to 100 MHz
http://www.spincore.com/CD/RFPA/PA15W_manual.pdf