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@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@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@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@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./
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