In this case would renting a bucket truck be a better value ????
Scotty N7HJ
On 7/8/05, Dino Darling <k6rix@earthlink.net> wrote:
> Do you have the ability to bolt on a winch at the top of the flat-top? If
> so...
>
> =======================================
> Set the antennas to NORTH (or south or east or west) and MARK IT!
>
> Use a shaft clamp (or muffler clamps) to hold the mast from falling down
> through the tower.
> (McMaster Carr
> <http://www.mcmaster.com/itm/find.ASP?tab=find&context=psrchDtlLink&fasttrack=False&searchstring=6436K27>6436K27
> or equivalent)
>
> Connect/secure the winch cable to the bottom of the mast, just above the
> rotor.
> (assuming you have a rotor and not a rotatable tower)
>
> Depending on what type of thrust bearing you have, you will need to loosen
> them enough to allow the mast to slip through. They will also help support
> the mast as it goes down.
>
> Bring the mast up with the winch, just enough to remove the rotor. You can
> tie the rotor out of the way or lower it down for inspection since it is out.
>
> Get back up to the flat-top, loosen the shaft clamp and lower the mast with
> the winch. The winch does all the work!
>
> MARK THE BEAM LOCATION ON THE MAST!
>
> Loosen the TH7 and continue to lower the mast. The mast should slip
> through the boom-to-mast clamp.
>
> When you get the mast down far enough to reach your antenna, re-install the
> shaft clamp and go to work!
>
> ======================================
>
> I do not have the advantage of seeing your set up. Every tower is
> different and therefore have different ways of attack. Use what I've given
> above at your own risk and modify as necessary. When in doubt, hire a
> professional! Be safe!!!
>
>
> At 12:20 PM 07/08/2005 -0400, you wrote:
> >I have a 24ft chrome moly mast on my 100ft Rohn 45 tower. 10ft of the mast
> >are in the tower and held by two thrust bearings. 14ft are above the flat
> >top
> >section with a Hygain TH7 mounted about a foot above the top section and a
> >Cushcraft 402CD mounted about 12ft above the top section.
> >
> >I need to get to the 402CD and therefore will need to lower the mast. Since
> >this mast is quite heavy, I'd like to know a safe procedure to do so.
> >
> >73, Greg AG5W
> >_______________________________________________
> >
> >See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> >any questions and ask for Sherman, W2FLA.
> >
> >_______________________________________________
> >TowerTalk mailing list
> >TowerTalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
>
> Dino...k6rix@earthlink.net
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
> questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|