This is a 1958 Sears Silvertone Model 9075 Hi-Fi Suitcase Amplifier. This thing was meant for amplifying record players, reel to reel tape machines and radios of the era, but we have something much more sublime in mind. We will do basic servicing on it like changing caps, then we'll look at the schematic and go over how to convert this into a rockin' little guitar combo.