[TowerTalk] Tower Connection

[terry burge]

For my rohn 55 tower I found some metal electrical boxes at habitate for humanities that serve the purpose of mounting MOV's on the control wires for rotor, remote switch and steppir antenna. It's mounted on an 8' galvanized ground rod that also has a galvanized plate where the Polyphaser lightning arrestors are. Seems to be working out well inspite of Oregon rains. Also added a couple more 8' ground rods placed at least 16' from one another around the tower with heavy copper wire running to them from the tower legs. The LMR-400 coax runs through the lighting arrestors and schedule 40 PVC to the shack about 168' away. Plan on trying to upgrade it to some Comscope 1/2" 75 ohm hardline I got a spool of for free if I can come up with a good way to mount PL-259's on it. Don't think the 75 ohm will be too much of a problem and to look at it 1500 watts should work OK.


Tree, N6TR did the stacking and I'm well pleased. I did the cutting and installing of the ceramic insulators on the four sets of guy wires. About 75 plus insulators. Also all the concrete work with the help of a couple of young friends. One in particular dug the three anchor holes. The holes were a big concern for me but my young friend was a good worker and it turned out to be not quite a big of job as I though. For the tower base I rented a Kabota backhole and tried my hand at backhole work. Ended up a much wider base than need be but just more 60# sacks of concrete mix. A lot of those sacks but getting a concrete truck into my location would have been hell. Used my pickup to carry about 5 loads of concrete sacks each about 25-30 of them.


The tower now stands 117' foot high with the 3 element steppir a foot or so above it and working well. Bigger that I ever though I would have. Now if we could get some decent propagation.  


Terry

KI7M


> On January 21, 2018 at 8:32 AM Grant Saviers wrote:
> 
> 
>     The KF7P boxes are a very good deal IMO. Considering what a galvanized
>     box costs and the real PITA of drilling, cutting, and punching holes
>     into these steel NEMA rated outdoor "enclosures" you will be way ahead
>     with one of them. Just finished a project with one and I have a complete
>     machine shop, hydraulic chassis punches, etc.
> 
>     Plus, Chris has thought thru all the details and provides for them.
> 
>     Go big since you need to bend the coax to arrestors, tighten PL's and
>     screws etc. As time goes by you will likely add more stuff.
> 
>     Grant KZ1W
> 
>     On 1/21/2018 7:43 AM, Mickey Baker wrote:
> 
>         > > If all you're seeking is a waterproof connection box, you can get PVC
> >         versions at Home Depot.
> > 
> >         For something nice, painted, drilled:
> >         http://www.kf7p.com/KF7P/JunctionsBoxes.html
> > 
> >         You can find a nice metal electrical box on Amazon or at your local
> >         electrical distributor.
> > 
> >         Like Fred, I have no affiliation with any of these vendors.
> > 
> >         73,
> > 
> >         Mickey N4MB
> > 
> > 
> >         Mickey Baker, N4MB
> >         Palm Beach Gardens
> >         *“Tell me, and I will listen. Show me, and I will understand. Involve me,
> >         and I will learn.” *Teton Lakota, American Indian Saying.
> > 
> >         On Sun, Jan 21, 2018 at 10:09 AM, Fred Keen via TowerTalk <
> >         towertalk at contesting.com mailto:towertalk at contesting.com > wrote:
> > 
> >             > > > DX Engineering sells a box, arrestors and connectors you are looking for.
> > >             I have no financial interest in DXE or Mr. Duffy.
> > >             Fred KC5YN
> > > 
> > >             On Sunday, January 21, 2018 9:02 AM, W1PDI via TowerTalk <
> > >             towertalk at contesting.com mailto:towertalk at contesting.com > wrote:
> > > 
> > > 
> > >             I'm in the planning stages to put up a 50 ft aluminum Universal Towers
> > >             fold over tower.
> > > 
> > >             I'm trying to line everything up for a March project date. Question-tower
> > >             will be approx 100' from house. I plan on bury coax and rotor cables in PVC
> > > 
> > >             Would it be wise to run cables down tower to a connection box at base for
> > >             lightning arrestees and provide an easy way to replace coax from base to
> > >             antennas if needed such as adding addl tower sections.
> > > 
> > >             If so where can I find a waterproof connection box that will handle 3
> > >             RG213u, rotor cable, bus vat and arrestors?
> > > 
> > >             Tom
> > > 
> > >             Sent from my iPhone
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