After multiple PA insertions, the fingers of the RF input connector of the STX10 Combiner unit can lose their springiness, causing poor contact between the combiner and the PA Module.  This can cause connectivity problems, arcs, etc.

You can create your own spreader tool with a wooden, plastic, or other non metalic material dowel with the following dimensions: 15.85 mm outer / 7.84mm inner.

Please watch this video for more detail: