Vy cool DF set. W/R-390, no less.
My EE department built the first Wullenweber in the Americas, out of a dismantled installation from Germany.
I never visited the array (long since torn down), but I did see a goniometer in our machine shop. As I recall, it was a cube about 2 feet on an edge, with a big knob and compass rose on the top, and a jillion coax connectors around the sides.
The EE department got to maintain the array and to use it for various purposes; but when the Navy came in to use it, they kicked all the EE guys out. Not enough clearance, I guess.
I want to say I was still using R-390s at least till the mid-80s. Heck, you can probably find them in use today in some gov't backwater.
And I think we even had to adjust that goniometer for the AN/TRD-4 when setting up the antenna array. Long time now though :-)