[TowerTalk] Subject: HDBX-48

[Earl Morse]

Tom,

Had a HDBX48 up at two qths.  It requires a pretty big block of concrete, at least compared to guyed towers.  Skip the mounting plates and fold over bases.  Get the BXB stubs.  I think they are BXB7/8 for the HDBX48.  These bolt right to the bottom of each leg of the bottom section and are nothing more than a flange that goes in the concrete.

Bolt these to the bottom section then support the entire assembly over the hole and pour the concrete.  You will need to be sure that the bottom section is plumb and held in place when you pour the concrete as you won't be able to adjust it afterwards but it is the cheapest way to install the BX series of towers.

The HDBX is a fairly stocky short tower that doesn't require guying.  They move quite a bit when climbing them as compared to a guyed Rohn tower.  While there are step wrungs on the top section to stand on while working on antennas they are a meatgrinder to climb with the cross rungs that pinch your feet.  Check the specs, you probably violate the loading of it with a tribander as they were meant for supporting verticals and shorter boom tv antennas.  Don't send it to the hot dip if you want it replated.  It is held together with AL rivets and you will get back a pile of plated cross members and corner pieces.

A quick search yielded these links showing the base details:
http://www.criticaltowers.com/bx%20series%20towers/web%20pages/BX%20Series%20Tower%20Page.htm
http://www.ne7x.com/new_shack_antenna.htm

Earl
N8SS

-----Original Message-----
From: Tom Horton <k5iid at sbcglobal.net>
To: Towertalk Reflector <towertalk at contesting.com>
Sent: Sat, Jan 31, 2015 4:00 pm
Subject: [TowerTalk] HDBX-48


I have purchased a used Rohn HDBX-48 to be installed at my new QTH. What do
I 
need in the way of Mounting materials (mounting stubs,etc) and more
importantly, 

where can I get them. 

Does anyone know who actually stocks them. Can they be manufactured by an 
individual? I can't even find a picture of what one should look like.
Thanks in advance...
 Tom K5IID

 
Finally there is a bit of joy in Mudville! 
http://www.dfwcontest.com 


K5IID Tom Horton  Hillsboro, TX 
E sorter for ARRL W5 bureau 
Same call for 57 years!
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