Call Search

New to Ham Radio?
My Profile

Friends Remembered
Survey Question

DX Cluster Spots

Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement

donate to eham
   Home   Help Search  
Pages: [1]   Go Down
Author Topic: Tri-Ex Crank Up 5 Section Tower Information Needed  (Read 6597 times)

Posts: 5

« on: May 19, 2013, 07:48:28 PM »

I spoke with the folks at U.S. Towers at Dayton this year and they said the tower that I have acquired is a Tri-Ex and not theirs. The dimensions are exactly the same as the current production TX-489 they make. The section face dimensions etc match up perfectly. That being said this tower has a home made folding base on it that will be disposed of. This tower has a couple of mounting points on it one for a motorized winch (missing when purchased) and one for what appears to be a hinge point a bit further up the tower face. I took some photos of the entire tower and they aren't the best quality. I should take delivery of the tower in the next few weeks. An old friend called me to let me know he had purchased it for scrap metal weight. Such a nice tower didn't deserve to be melted down. As photographed he said the tower weighed on his scales a little less than 1600 lbs. It is obviously a 5 section crank up and again outside face dimensions are exactly the same as the current production TX-489.

Anyone know what a model # for this thing would be? Any idea as to why it doesn't have any mounting flanges welded to the bottom of the three legs? They haven't been removed they appear to have never been there. I would like to use this tower and have it installed properly but the lack of information is beginning to pile up! It will obviously need recabled and a new winch but the mounting base has me most perplexed. I can't help but wonder if it was on a tower trailer but still lack of flanges is perplexing to me.

Photos at the link below:

Shane KI4M


Posts: 618

« Reply #1 on: May 19, 2013, 10:09:53 PM »

These folks are the successors to the TriEx towers and a lot of their people are former TriEx employees.  Perhaps they can help.

Good Luck,

Posts: 5

« Reply #2 on: May 20, 2013, 04:16:12 PM »

Thanks Tom I will drop them a note!

Shane KI4M

Posts: 5

« Reply #3 on: May 20, 2013, 04:44:24 PM »

Tri-Ex is not the manufacturer of this per their company owner. Back to the drawing board I guess! He said in his opinion and what I said it is a U.S. Tower but neither of us are for certain. Anyone have any ideas on a US Tower model # due to odd base mount configuration.

Posts: 3160

« Reply #4 on: May 20, 2013, 07:35:00 PM »

START by reviewing the 1976 Tristao Tower Catalog

LOOK at the Lightweight Tristao CTL Crank-Up GUYED Towers.
These series of towers had different base, like the one in your photos.
This CTL series are NOT self-supporting towers.
CTL-188, CTL-341, and CTL-388 are 5 sections.  

U.S. Towers no longer mfg. the CTL series.
Get your tape measure, all the measurements are in the catalog!


TRISTAO CZ454FS Tower, 54 feet : N4LDM

US Tower Corporation was formed from the purchase of Tristao Tower in 1985, which invented and developed the telescoping tower nearly 85 years ago.  Lou Tristao founded Tri-Ex, after the sale of Tristao Towers.

In 2003, US Tower expanded through internal growth to establish a northern Kansas location, closer to their central and east coast amateur, corporate, and military customers.
MFJ moved/closed Hy-Gain Towers manufacturing based in Lincoln, NE a few years earlier.

US Towers Corporation in Lincoln, Kansas was officially formed in 2006. U.S. Tower opened their Alabama manufacturing plant, near Huntsville, in the 2011 focusing on southern USA, military, and Carribean markets.

You can contact U.S. Tower at:

U.S. Tower
1099 West Ropes Avenue
Woodlake, CA 93286
Phone: 559-564-6000
« Last Edit: May 20, 2013, 08:10:02 PM by W9GB » Logged

Posts: 3160

« Reply #5 on: May 20, 2013, 08:45:27 PM »

Lou Tristao founded Tristao Expanding Masts which became Tri-Ex in 1985, after the sale of Tristao Towers creating U.S. Tower.  The Wilson crank-up towers, for his son, were his designs.
Lou Tristao, KG6VY (sk) passed away September 2001.

Karl Tashjian worked at Tri-Ex Tower Corporation from 1985 to 2000.
While at Tri-Ex, he was the engineer of record for hundreds of towers, working on tower designs for the amateur radio, cellular, FM, TV, AM radio, and the US Army.

In 1997, International Tower was formed from Tri-Ex Towers and S&G Communication. ITI specialized in tall towers for the broadcast industry. While at ITI, the engineering group which Karl was in charge of engineering and designed several candelabrum towers approximately 2,000 feet tall, 1860' tower 10' face tower in Louisiana, a 1,000 foot tall candelabrum in downtown Atlanta guyed at 35%, along with many other tall heavy towers.

In January of 2000, SpectraSite Broadcast group purchased International Tower Inc. SpectraSite closed the engineering offices at the Tri-Ex plant in Visalia in October of 2000, at which time Karl began consulting full time.   The old Tri-Ex Towers Corp. was dissolved in California so Karl Tashjian incorporated as Tri-Ex Towers Corp. in California in Jan. 2002.  
In Jan. 2003, Karl changed the name of the corporation to Tashjian Towers Corporation.
Tashjian Towers does NOT manufacture the complete catalog of earlier Tri-Ex Towers.

Tashjian Tower Accessories

Tashjian Towers use a different fold-over mechanism
« Last Edit: May 20, 2013, 09:01:42 PM by W9GB » Logged

Posts: 57

« Reply #6 on: May 21, 2013, 04:28:01 AM »

Greg / W9GB

Great information on the towers.  We have a dedicated crankup/tiltover tower forum with documentation on the various tower vendors.  It would be nice to have you join and share some of the documentation and your experiences with the group.

Anyone interested in crankup and tiltover towers is welcome to join, we have about 300 members currently.

Regards, Al

Posts: 5

« Reply #7 on: May 21, 2013, 05:57:29 PM »

Thanks for the ideas/help guys. The base that is on this tower now is a home made cobbled up mess that will be coming off. I have a few leads on what it may be but will wait until I get some photos to make for certain.

Shane KI4M
Pages: [1]   Go Up
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!