I regalvanized several sections of Rohn 25 a few years
ago (the shop is literally next door to where I work).
They were remarkably accepting of my small business...
They quoted me somewhere around $0.30 a pound and
another $0.05 to remove the old galvanizing (OK, zinc
plating). Took about a week. They would NOT remove
paint (I had none thankfully).
Once re-dipped, the sections slipped together only
after some grinding of the zinc, and the bolt holes
did need to be opened up (I used a taper pin - the
same one I use to align the holes during tower
installations).
On the outside (especially the Z-braces) there were
zinc "razors" (drips with sharp edges) but far fewer
than what was on the 10 sections of brand new Rohn 45
I bought 15 years ago. I filed all these down.
Mike N2MG
N4GNR wrote:
> I have done this and there are problems you will
> have to deal with...
> The new galvanize will adhere to the inside walls
> of the tower legs, and will form solid, not
> allowing the legs to drain water. If the legs are
> not cleared, they will freeze and "bust". A long
> ground rod run through the legs will solve this
> problem.. The biggest problem I encountered was
> the legs have to be drilled out to get out the
> excess galvanize so that the legs will slide
> together. A drill bit exactly the same i.d. of
> the tower leg must be used...find out the internal
> dimension of the leg before galvanizing..
>
>
> And, the only other thing you need to do is get all
> the "burrs", or stickers of galvaize off the tower
> surfaces, or they will EAT YOUR HANDS UP!!!!
>
> Otherwise, you can expect 20 years or so of new life
> to the re-galved tower
Julio Peralta wrote:
> > The radio club here in Tampa is putting together a
> > modest HF/VHF contest station. We have acquired 11
> > sections of Rohn 45.. It has been suggested
> > that we re-galvanize the sections to increase the
> > longevity of the tower.
> > A question came up regarding whether the sections
> > would fit together again after the re-galvanizing.
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