Well Ken --
I dug around and found an old Rohn dealer's catalog
stamped July 1, 1971 from back when I owned a ham
store. Sure enough they did have a crankup like you
describe called SD and HD series. I don't see the words
spelled out but I would guess that means "Standard Duty"
and "Heavy Duty."
It shows the SD series in heights: 37, 54, 71, 88, 105,
and 122 feet. The SD1-122G weighted 1675# and list
price was $2250. (Darn, why didn't I think to buy one
back then when the price was down there?)
The HD series was available in: 37, 54, 71, and 88 feet
models. The HD3-7-88G weighed in at 1575# and listed
for the same as the taller 122' SD model - $2250.
Just glancing through the catalog, it looks like there was
no reference to using these towers in self-supporting
mode and there are numerous references to how to guy
them and the guy packages sold for its use.
Again, I hope this helps.
Jim - K5LAD
On 19 Mar 2007 at 11:29, firstname.lastname@example.org wrote:
> Is anyone familiar with or have information on Rohn crankups? The
> tower in question is a 3 section crankup that is supposed to be
> similar to a Tri-ex LM354 or US tower HDX-555. When were these made
> by Rohn? Does anyone have a brochure, drawings, etc? Thanks, Ken,
> N0VZ _______________________________________________
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