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: Rohn 25 vs 20 tower  (Read 595 times)
K9COX
Member

Posts: 53




Ignore
« on: June 07, 2002, 09:51:36 AM »

Does anyone know how to tell the difference between old Rohn 20G tower from 25G? Thanks
Logged
WB2WIK
Member

Posts: 20540




Ignore
« Reply #1 on: June 07, 2002, 01:46:12 PM »

20G has thinner wall tubing for the three legs, and thus weighs less.  I can tell just by picking one up, the 20G is an obvious 5 lbs or so lighter per section.

WB2WIK/6
Logged
WA5EE
Member

Posts: 79




Ignore
« Reply #2 on: June 08, 2002, 05:41:45 AM »

The spec says a 10-foot section weighs 30 lbs. for 20G and 40 lbs. for 25G .The difference can be found in the leg wall thickness ,18 gauge on the light stuff , 16 ga. for 25G. Some people say there are a different # of cross braces , but Rohn's own literature,at least for recently manufactured sections , shows otherwise .To be sure,weigh it.And please...climb safely .Don't bet your life on a leather belt .

Russ,WA5EE
Logged
N2MG
Administrator

Posts: 121



« Reply #3 on: June 08, 2002, 10:20:52 PM »

I believe the R20 has one fewer z-brace "bay" per ten-foot section.  IOW, six instead of the R25's seven.
Logged
WA5EE
Member

Posts: 79




Ignore
« Reply #4 on: June 09, 2002, 11:45:29 AM »

I agree that if it has 6 bays instead of 7 , it's NOT Rohn 25 . However , since both the 20 AND 25 in CURRENT manufacture have 7 bays (you may verify this at  http://www.warrenelectronics.com/tower_1.htm ) , having 7 does NOT guarantee that it is 25g tower .I gather there was a change in the 20g spec some time in the past , and if anybody knows the particulars , I'd love to hear it.

Russ ,WA5EE
Logged
N2MG
Administrator

Posts: 121



« Reply #5 on: June 09, 2002, 08:49:50 PM »

Wow Russ, that's interesting.  Warren lists a product that Rohn seems to deny they even make (see their website), hi!

OK, so a 6-bay is a dead giveaway for the tower being NOT Rohn 25. But 7-bay guarantees nothing...maybe...

Smiley
Logged
WA5EE
Member

Posts: 79




Ignore
« Reply #6 on: June 10, 2002, 06:32:49 PM »

OK....mea culpa , SRI OM , and uh-oh...after visiting my local distributor this morning ,and confirming that his recently stocked 20g and 25g had different bracing ,I called Rohn in Indiana and got this response in e-mail from their engineering manager . << The 20G and 25G tower sections can be identified by the number of bays in
the bracing.  The 20G tower will 6 bays spaced approximately 18.25" while
the 25G will have 7 bays spaced approximately 15.75".>>  Sorry to have created controversy where there was no need .Guess I'll change my call to W5DUH .I'll follow up by calling  the owners of the misleading site .

73,Russ ,WA5EE


Logged
KI4BNH
Member

Posts: 2




Ignore
« Reply #7 on: June 04, 2004, 06:56:57 PM »

I found this searching rohn 20g  on msn search

The 20G Series is not recommended for commercial, ham, CB or guyed installation. All other specifications and sizes are the same as the 25 series

per  http://www.aedwis.com/rohntower.html

Logged
N7YV
Member

Posts: 28




Ignore
« Reply #8 on: March 19, 2008, 01:51:56 PM »

Hi

What does IOW mean?

Thanks,
73, Roger, N7YV
Logged
W8JI
Member

Posts: 9304


WWW

Ignore
« Reply #9 on: May 02, 2008, 06:46:33 PM »

The easiest way to tell....


Rohn 20G has seven horizontal braces per ten foot section.

Rohn 25G has eight horizontal cross braces per section.

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!