It wasn't clear to me whether the 10 pF test load that simulates the capacitance of the circuitry the filter feeds should be reversed along with the filter when doing the reverse measurement. Don had left the capacitor in place on his test board when reversing the filter in a socket. He made some new measurements with no capacitor. The plots show the renormalized response with (red) and without (blue) the capacitor. It has some effect in the stopband but very little in the passband.
Brian
