Need site location where to find specs on the old military rotating tower
made in the 60s by
Tri-Ex. They are typically 71 ft telescoping 3 section with a ring at the 20
ft point and prop pitch motor and chain at base to turn the tower and a
fixed antenna like an LP 2-30 mHz mounted atop. I believe the model to be
the HDZRN series. Need the slab info as well as the engineering data on the
tower.

Any help is appreciated.

Thanks Al W6GSQ