Lately that the Spectra seemed awfully chatty, with non-repeatable hits. Yesterday, I noticed that if I bumped the left side of the coil against anything I would get a false coin hit but bumping the right side nothing happened. I tried my 5.3 and the 6x10 and neither of them do that using identical settings. Does that sound like a defective coil? I'm going to call White's tomorrow and see what they have to say about it.