If the back side of the Nooelec amp/filter comes in contact with the foil of the horn, it shorts the amp effectively turning off the bias T. The bias T LED turns off, but most users will probably not notice that.
This will be solved with a proper housing, but in the mean time, I think we should add a sentence in the building instructions to place a piece of duct tape on the back side of the amp to avoid this shorting.
If the back side of the Nooelec amp/filter comes in contact with the foil of the horn, it shorts the amp effectively turning off the bias T. The bias T LED turns off, but most users will probably not notice that. This will be solved with a proper housing, but in the mean time, I think we should add a sentence in the building instructions to place a piece of duct tape on the back side of the amp to avoid this shorting.