Pete brought up an important point on the vertical. Your top (long) coil lead must go into the positive hole, or it will short on the air tube.
My horizontal shorted on the airtube a few weeks ago. I had been out in the cold with it for awhile. I came into the warm house, and boom, it shorted out! The change in temp caused the leads to weaken and the coil dropped down. It took me forever to figure out the problem.
My horizontal shorted on the airtube a few weeks ago. I had been out in the cold with it for awhile. I came into the warm house, and boom, it shorted out! The change in temp caused the leads to weaken and the coil dropped down. It took me forever to figure out the problem.