Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
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
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Can you identify this tower?  (Read 1192 times)
KB1UJS
Member

Posts: 40




Ignore
« on: October 30, 2012, 11:40:13 AM »

Hi all. I am looking at buying a used self-supporting 40ish foot tower. Unfortunately, the seller lives several hours away and can't tell me exactly what he has for sale. I've attached the picture I have of the sections. They are all about 9' long, galvanized steel, and there are climbing pegs up one leg of the tower. The seller was told by someone the tower was made by Wade Antenna in Canada, but he can't confirm that and I found nothing on their web site that is comparable. Can anyone tell me what brand of tower this is and whether it will support a HyGain Explorer 14 tribander (7.5 sq ft wind load) with a Ham-IV rotator? Thanks.

Ken

http://forums.qrz.com/attachment.php?attachmentid=109032&d=1351615419
Logged
W9GB
Member

Posts: 2626




Ignore
« Reply #1 on: October 30, 2012, 01:36:55 PM »

Ken -

Wade Antenna DMX tower was very easy to find on the Internet.
http://www.wadeantenna.com/Wade/DMX.htm

Wade bought Delphi Towers (based in USA), that mfg. the DMX tower.
Here is specification brochure:
http://www.wadeantenna.com/Wade/DMX.pdf

These tower sections also look like the Thomas Shelby/Rohn BX Tower sections.
The BX series is NOT designed for large HF antennas.
http://www.criticaltowers.com/bx%20series%20towers/web%20pages/BX%20Series%20Tower%20Page.htm

Used Towers
http://www.usedtowers.com/bxtowers.htm

LOAD LIMITS
Wade/Delphi DMX Standard Duty Towers
are designed to support up to 3 square feet (0.28 square meters) projected wind area.

Hy-Gain Explorer EXP-14
http://www.hy-gain.com/Product.php?productid=EXP-14

PAGE 1-2 in the EXP-14 manual:  Wind Surface Area: 7.5 square feet (0.69 square meters)
Your Hy-Gain Explorer wind area is DOUBLE what the tower can support.

The standard DMX tower is NOT SUITABLE for the Hy-Gain EXP-14, Explorer !
« Last Edit: October 30, 2012, 01:54:48 PM by W9GB » Logged
WB2WIK
Member

Posts: 20614




Ignore
« Reply #2 on: October 30, 2012, 01:41:47 PM »

Ken -

These tower sections look like (similar) to BX Tower sections.
The BX series is NOT designed for large HF antennas.
http://www.criticaltowers.com/bx%20series%20towers/web%20pages/BX%20Series%20Tower%20Page.htm

Used Towers
http://www.usedtowers.com/bxtowers.htm

I would NOT use this type of tower for an HF beam, such as the Explorer.

I thought that too for a moment, but I don't see the rivet holes on the photo he has; I don't think it's a BX type.  Might have braces welded-?  Really hard to tell.

In any case, as I posted on the other site, there are too many very good "known for certain" towers with complete engineering specifications available on the used market to take a chance on an unknown.  I'd pass.
Logged
N1CX
Member

Posts: 131




Ignore
« Reply #3 on: October 30, 2012, 04:22:37 PM »

Looks like a 30' chunk of bx series.

Stuff stinks to work on it kills your feet, it's cheap, it's sharp, it's light duty.

It also most likely doesn't meet current wind specs so may have problems getting a permit if needed.
Logged
KB1UJS
Member

Posts: 40




Ignore
« Reply #4 on: October 30, 2012, 04:39:43 PM »

Ken -

These tower sections look like (similar) to BX Tower sections.
The BX series is NOT designed for large HF antennas.
http://www.criticaltowers.com/bx%20series%20towers/web%20pages/BX%20Series%20Tower%20Page.htm

Used Towers
http://www.usedtowers.com/bxtowers.htm

I would NOT use this type of tower for an HF beam, such as the Explorer.

I thought that too for a moment, but I don't see the rivet holes on the photo he has; I don't think it's a BX type.  Might have braces welded-?  Really hard to tell.

In any case, as I posted on the other site, there are too many very good "known for certain" towers with complete engineering specifications available on the used market to take a chance on an unknown.  I'd pass.

I wish I were closer to look at the tower.  I could probably find some markings on the tower sections to identify it.  I will probably end up passing on this one due to lack of info.

Does the BX series offer climbing pegs for the tower?  This tower has that and I can't find whether BX series towers had that available.  All I can find is numerous comments saying "don't climb BX tower - it's not designed for that!"
Logged
KB8BAB
Member

Posts: 101




Ignore
« Reply #5 on: October 31, 2012, 06:29:45 PM »

Ken -

Wade Antenna DMX tower was very easy to find on the Internet.
http://www.wadeantenna.com/Wade/DMX.htm

Wade bought Delphi Towers (based in USA), that mfg. the DMX tower.
Here is specification brochure:
http://www.wadeantenna.com/Wade/DMX.pdf

These tower sections also look like the Thomas Shelby/Rohn BX Tower sections.
The BX series is NOT designed for large HF antennas.
http://www.criticaltowers.com/bx%20series%20towers/web%20pages/BX%20Series%20Tower%20Page.htm

Used Towers
http://www.usedtowers.com/bxtowers.htm

LOAD LIMITS
Wade/Delphi DMX Standard Duty Towers
are designed to support up to 3 square feet (0.28 square meters) projected wind area.

Hy-Gain Explorer EXP-14
http://www.hy-gain.com/Product.php?productid=EXP-14

PAGE 1-2 in the EXP-14 manual:  Wind Surface Area: 7.5 square feet (0.69 square meters)
Your Hy-Gain Explorer wind area is DOUBLE what the tower can support.

The standard DMX tower is NOT SUITABLE for the Hy-Gain EXP-14, Explorer !



Looks like sections from a Rohn BX or perhaps even HBX...but like others have stated, it's hard to determine from the picture.

BTW, I have a 48ft Rohn BX (shortened at the top to 44ft) with a Hygain EXP 14 on top of it....handles it just fine..
Logged
WB2WIK
Member

Posts: 20614




Ignore
« Reply #6 on: October 31, 2012, 07:00:42 PM »


Quote
Looks like sections from a Rohn BX or perhaps even HBX...but like others have stated, it's hard to determine from the picture.

BTW, I have a 48ft Rohn BX (shortened at the top to 44ft) with a Hygain EXP 14 on top of it....handles it just fine..

It may handle it fine, but it could be impossible to get a permit for one with an engineering inspection, since the Rohn BX engineering documents clearly state that the tower is not rated for antennas having boom or element lengths longer than ten feet.  If you need a permit and an engineering review, this wouldn't fly for most HF beams.

If you don't need one, it might work for a long time!
Logged
WN2C
Member

Posts: 471




Ignore
« Reply #7 on: October 31, 2012, 07:39:08 PM »

I have a HDBX w/ am A4S on it, mounted aproximately 1.5 ft above the top plate.  Been up for 6 yrs and no problem.  I talked with some one at AES in Milwaulkie or Cleveland and they had a bunch of beams for different bands (hf, 6, 2) on theirs, had it up for years with problems.
Logged
Pages: [1]   Go Up
  Print  
 
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!