Today I went to Thomas to see what cause the problem on 40m from his brand new Steppir.
Arjen PA7LV was also there.
After some tests we found out that one or both elements around the 30 meter frequency. That’s when he comes out of the banana. When we looked very carefully inside we saw small pieces of plastic from the clamp who is making the connection between the element and de (. We removed this carefully and did this on both sides.
After that we put it all together and problem is solved. Of course this a factory made fault. Maybe a Monday morning product?