I just got the armada A frame and used it today. it didn't really help pinpoint the open any better than the 800 did the other day. in the end, i ended up repeatedly halving the distance between 2 "good" sections of wire and ohming out the open side. i ended up replacing about 20' of wire (it wasn't deep at all, and kind of chewed up from an aerator). in close proximity to the open is primary and secondary electric, the transformer, and site lighting, which is energized to the pole, so there was a good deal of distortion.
i need to set up a controlled training field for the a frame, so i can see what happens under various conditions. that said, does anyone with experience with this piece have any other tips?
thanks for all your help, now i'm off to watch youtube videos of fault finding.