[TowerTalk] HDBX Version History...

[Mark - N5OT]

I am enjoying Kim's thread on BX towers.  Steve mentioned that the other 
guy had an AX not a BX and I need some clarification from guys who know 
more than I do.  If the fellow who's antenna twisted itself to pieces 
had and AX I would have thought the more notable deal with the X-bracing 
would be that on the AX the braces don't take up as much vertical space, 
and don't touch each other.  On the BX they do.  Clearly the BX is a 
better design?  (Hell to climb though, just sayin'):

Examples of what I am talking about:

https://www.n5ot.com/AX.jpg
https://www.n5ot.com/BX.jpg

If I have this wrong I would appreciate knowing it.

Thanks,
73 - Mark N5OT


On 7/2/2019 3:22 PM, Kim Elmore wrote:
> Ah! OK — I began to wonder if I was losing my marbles. Well... I obviously lost ‘em long ago, but still...
>
> Kim N5OP
>
> "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith
>
>> On Jul 2, 2019, at 11:49 AM, k7lxc at aol.com wrote:
>>
>>>   I recently asked a question about HDBX 48 torque loading. Another
>> towertalkian told me his failed in about 80 MPH winds. He sent me a
>> picture of his failed HDBX 48 (more heavily loaded than mine by a fair
>> bit) that failed. Something I noticed in the picture was that his
>> HDBX48?? had only *five* X-braces per section; I thought it looked odd,
>> so I went out and looked at mine: mine has *six* X-braces per section.
>> He said his was manufactured sometime around 1968-1970 while mine was
>> put up around 1986, so was probably made around that time.
>>
>>>   Did Rohn change the design of their BX towers to add another X-brace to
>> each section, or am I seeing things?
>>
>>      Nope, your eyesight is ok. The original tower you saw was the AX.
>>
>> Cheers,
>> Steve    K7LXC
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