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

To: "" <>
Subject: [TowerTalk] "LOCK OUT" device for a US Tower or Tri Ex Tower
From: Karyn Kornreich <>
Reply-to: Karyn Kornreich <>
Date: Tue, 29 May 2012 16:11:18 -0700 (PDT)
List-post: <">>
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

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