Now that I have your attention, I can't figure out what this thing is supposed to look like. I guess it is more of a noise finder, not eliminator. You have a $13 Radio Shack amp/speaker and two pieces of wire. One is a RG58 cable and the other is just a 20 gauge wire. Do the pieces of wire get joined together? If so, how does that leave you with two ends for alligator clips when one end of the small wire needs a mini plug soldered on to plug into the amplifier? Maybe RC will help with the explanation. If somebody can draw a rough picture that would be great since it is worth a thousand words. Thanks.
http://www.davidnavone.com/heresHow/june2003-pt1.htm
http://www.davidnavone.com/heresHow/june2003-pt1.htm