When I read that about a switch box I remembered your pictures and the Dain Bramage kicked into high gear as I realized that you were testing them side by side instead of same location, mast, height, coax, etc...
I know it's possibly splitting hairs, but I wonder how well the coax is 'tuned' into the I-10K and it would be great to know if the stations which were stronger just happened to be 1/4 wave off from the two antennas, possibly putting the I-10K into the null whereas the 'other' may have been at a peak of the wave.
I've seen this happen from the mobile on 10m, 11m, 6m, 2m & 440. And when I moved the Ringo from the rear right of the house to the rear left all of a sudden Donn was now 1 S-unit stronger and Mike was 2 S-units weaker, and I only moved the Ringo about 23' but at a diagonal that was closer to 1/4 wave to each of them.
It would be really cool if you could run fresh tests with only 3-4 fixed stations at varying distances and with quality S-meters to find the results of using the exact same mast height & location, coax, etc..., and only between the SD and I-10K.
