Ok. I took in an older amp on trade and can’t find any info on it. It is about 7 inches long 5inches wide and 3 inches long and one end has the typical so-239 connections and the other has 2 switches one labeled rcvr amp off- on and the other is power on- off. It also has 3 lights and says Century pre-amp but no numbers anywhere. Any info would be appreciated. Wattage output? SSB?