As the FS filters are now all removed, I ran a quick check to see if
all the VLA antennas fringe properly above 1730 MHz.
They seem to, but it was also noticed that the VLA and EVLA were
mutually incoherent at all frequencies above 1710 MHz (specifically,
1760, 1810, 1860, 1910 and 1960 MHz).
I'll take a closer look tomorrow at the full dataset.