[TowerTalk] HDBX Version History...

[Kim Elmore]

Well. What I'm learning is that not all HDBX48s are the same, so unless 
I'm told the lineage of what the picture showed, I have no idea. It was 
a long time ago, and mine has certainly weathered some significant 
winds. If it falls, it won't hit anything significant and its insured, 
so I shall bask in my good fortune so far!

Kim N5OP

On 7/1/2019 10:08 PM, Don Moman VE6JY wrote:
> The early Delhi's had the similar swaging...  The common term around here
> is the necked or  "Coke Bottle" style vs the newer continuous taper.
>
> On Tue, Jul 2, 2019 at 2:52 AM Kelly Taylor <ve4xt at mymts.net> wrote:
>
>> The Rohn BX towers accomplished tapering by having definite swaging near
>> the top of each section, while Delhi towers had a continuous taper from top
>> to bottom for most 48, 56 and 64-foot versions. The shape of the channels
>> forming the legs are similar.
>>
>> 73, kelly, ve4xt
>>
>> Sent from my iPhone
>>
>>> On Jul 1, 2019, at 21:02, Kim Elmore <cw_de_n5op at sbcglobal.net> wrote:
>>>
>>> Maybe... He said it was an HDBX48, though. Have these things bee cranked
>> out by different companies since the beginning? I always assumed that in
>> the beginning, they were exclusively Rohn. Of course, I dunno when the
>> ???beginning??? was, so maybe by 1968 they were made by everybody...
>>> Kim N5OP
>>>
>>> "People that make music together cannot be enemies, at least as long as
>> the music lasts." -- Paul Hindemith
>>>> On Jul 1, 2019, at 6:44 PM, Don Moman VE6JY <ve6jy.1 at gmail.com> wrote:
>>>>
>>>> The Canadian version by Delhi (now Wade) is similar but has the 5 X
>>>> braces.  Perhaps he has one of those...
>>>>
>>>>> On Mon, Jul 1, 2019 at 10:47 PM Kim Elmore <cw_de_n5op at sbcglobal.net>
>> 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?
>>>>>
>>>>> Kim N5OP
>>>>>
>>>>> --
>>>>>
>>>>> Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
>>>>> SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
>>>>>
>>>>> /"In theory there is no difference between theory and practice. But, in
>>>>> practice, there is." //??? Attributed to many people; it???s so true
>> that
>>>>> it
>>>>> doesn???t matter who said it./
>>>>>
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-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in 
practice, there is." //??? Attributed to many people; it???s so true that it 
doesn???t matter who said it./