The high band monopoles also achieves the high Q goal and also uses the mirror image to create a dipole electrically. Similar impedance is likely. This is all I could glean related to actual construction details. The dimensions are not likely to be exact. Monopole designs are derived from surplus monopole antennas described by others.
Scales are from photographs.
The Wullenweber's days may be numbered. It shines in allowing the listener to electronically steer the beam and change the pattern shape at will. Modern DSP methods can do much of this now using multiple receivers and there are other more fancy ways to do wavefront analysis. Field Station Ausberg closed in 1993 having begun ops in 1970. RAF Chicksands, UK opened in 1950 with US personnel also listening to the East Block nations and the USSR with specific responsability for monitoring the Soviet Air Defense Network.