Last Fall I rebuilt a Cushcraft A3 and used a Balun Designs model 1115. Checked tuning on the ground with an antenna analyzer and several days later lifted it in place on a 40' tower. I noticed intermittent operation and extremely high reflected power. Climbing the tower, I gently pulled on the balun to driven element jumpers. Both wires pulled out of the crimp connectors. Closer inspection shows the wires burnt off the connectors. Two of the pictures attached show what I found. I only run 100 watts and there weren't any thunderstorms during that time. Wrote it off as one of those unexplained things that happen with antennas, replaced the jumpers and continued to enjoy the antenna. About 2 weeks ago I once again experienced extremely high reflected power and receive signals would go from S9 to S1 intermittently. With wind chills at -10F, climbing the tower would have to wait. Yesterday was 45F and calm so up the tower I went. This time I found one of the crimp connectors broken in two! No signs of burning, just broken this time. The jumpers are located so that they can not come in contact with anything when the antenna is rotated, there's plenty of clearance. I supposed these failures could just be unrelated coincidences. Anyone with similar failures?