Greetings VNA fans. Here is mystery...
I acquired this very clean 8753E option 6 with test port outer APC-7 shell and other connector parts missing. The couplers seem fine.
Otherwise the analyzer appears to be in good shape. I can manually connect a wire to the center pins and get reasonable responses on the display. I have no idea why someone would remove these parts, unless they had been damaged or perhaps were cannibalized to fix another unit.
Anyone out there have a suggestion on what to do? It's a nice analyzer but not to useful without test ports!