[TowerTalk] HDBX Version History...

[Don Moman VE6JY]

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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