I had to go to Autozone today but next door is the local Goodwill. I decided to stop in to see what kind of audio gear they had. I ran across this old Sherwood tuner and a Vidicraft STEREO SYNTHESIZER They both work, and total cost was $16.00....SOLD! I decided to hook them up to my Fisher SC-300K boom box. I listen to AM radio in the afternoon and was not happy with the reception I was getting from the Fisher, but all is now good with the new Sherwood tuner. The synthesizer has a bunch of knobs on it that I have no idea what they do, but I like the blue face. It has three knobs for the Synthesizer marked "SEPERATION" "LO DIMENSION" and "HI DIMENSION". It also has knobs for "CORNER FILTER", "DNR THRESHOLD", and a volume knob. Anybody know what this stuff is supposed to do? I read the patent it had on it, and it is supposed to change a mono input to stereo.