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Are you still hearing the hissing or spitting sound? A length of plastic tube held to your ear can help you pinpoint its location.
Phil Nelson
I am hearing a sparking noise, but I think it's coming from the 1X2 itself. You can see in the video that it is sparking on the inside. This is also what the old tube did.
Killer suggestion on the length of tube though. I will definitely remember that for the future.