I recently picked up my first turntable, a SL-230 that was in very good condition. I started looking around in it and decided that I wanted to rewire it. I had a length of Canare Star Quad L-4E6S cable left over and decided to use that with some audioquest rca ends I had. After looking at the inside it seemed the wires came through the tone arm and then were soldered to a board that then outputted 5 wires, one of which was the ground cable that came out. The other 4 were for the rca's. They were labeled as R and L with each having a + and a -. I thought this would be simple enough, so I unsoldered the original cables and put the canares on. I have it all hooked up now and there is an audible hum or his at all times that grows louder as in increase the volume. I am in no ways an audio expert so I consulted my Electrical Engineer roommate and he had a look at it but was unsure why it would be happening either. Does anyone have any suggestions? I'm not opposed to rewiring the tone arm either if that is what’s doing this; I guess I just need to be pointed in the right direction.