[TowerTalk] "LOCK OUT" device for a US Tower or Tri Ex Tower

[Karyn Kornreich]

We are looking to purchase a "lock out" mechanism for a two inch or 2 3/8 inch steel leg  round tube or pipe utilized on a 90 foot tower such as a Tri-Ex DX-70 or US Tower HDX589MDPL. This unit connects to the upper bottom section of a five section tower. This lock out was originally used on US Towers and Tri Ex towers for military crank ups but also purchased by several radio amateurs. Our club ( K6KAK) is looking for a used unit either mechanical or electrical that mounts to the tower. This "lock- out" feature prevents all sections from collapsing upon failure of the crank up cable or failure of the lifting Hub-City gear box. Upon locking the unit from the ground, a steel slide or rod will pass through all sections at the seventeenth foot level, thus preventing a failure mentioned above. US Tower will not sell this unit for stationary towers and Tri-Ex has not manufactured this unit for years. The "lock out" device is out there
 somewhere, perhaps previously mounted on mobile trailers.  
Thank you, Paul Landau