[Cliffdwellers] Re: Cliffdwellers digest, Vol 1 #20 - 1 msg
David Justis
[email protected]
Wed, 18 Dec 2002 11:47:45 -0600
Dear Group: I have used a similar technique for years....I have used old hardwood pallets painted with creosote in years past, now with environmentally-friendly oil-based paints,upon which a tripod is mounted. These are then weighted down with concrete blocks that can be stacked up around the tripod and further guyed down as needed....Small beams, Maypole type multiple-band dipoles and verticals have been mounted in this fashion and have endured many years of Minnesota winters....good luck hoisting up concrete blocks up the side of buildings too....I have installed this type of antenna system for HandiHams and on our hospital as well...they work great...only one came down with small beam up 15 ft above roof with winds over 100 mph......ps you may wish to reinforce the pallet with 5/8 "lag bolts to hold it together and sometimes put marine plywood over the pallet deck..this keeps it up off the often graveled roof surface and prevents moisture-related rot.....good luck ... david l justis md, kn0s
[email protected]
>From: "Joe Talbot"
>To: [email protected]
>Subject: [Cliffdwellers] Re: Cliffdwellers digest, Vol 1 #20 - 1 msg
>Date: Wed, 18 Dec 2002 09:56:10 -0700
>
>
>
> Hi Jim: Very timely! We are on the same page, I used something
>very similar for years, the Radio Shack tri-pod bolted (carriage
>bolts, round head down) to a 4'x4' piece of G1S plywood with a good
>coat(s) of Thompson's waterseal. For ballast I used 3 24"x30"
>concrete sidewalk blocks, they slid nicely between the tri-pod legs.
>The mast was 32', it survived over 10 years against winds of 50 mph,
>rain, snow and -50F. This setup was set up against the shop, so that
>blocked say 10-15' of the mast. There were days when that mast would
>"whip" around a foot or so each way, for the neighbors piece of mind
>I added two rope "guys", it did stabilize the mast, it kept him
>happy. The "guys" were simply tied and taped mid-way up the mast,
>then tied to a nearby fence.
> Taking it down was easy, just remove the ballast, tip the mast
>your way and walk it down. When I finally took it down the plywood
>was in still in very useable shape. Just to be safe I changed that
>old piece of plywood with new.
> Over the summer I painted the mast and in the next day or so I
>will be using that same tripod/mast setup (un-guyed) as one support
>for a Flag Antenna, between my 64' tower. About 15' of the 32' mast
>will be sheilded from the prevailing wind by the shop roof peak, a
>wind break.
> If a person wanted added safety, you could drill appropriate sized
>holes in the corners (a few inches in from each corner) of the
>plywood. Using say 4' lengths of 3/8" rebar with a "fender washer"
>driven thru the corner holes. This is the method used for holding
>the base on a "bracket tower".
> So yes a very proven method, tested, tried and true here. Give it
>a try, think safety first! 73's.
>
>
>
> Joe Talbot
> Red Deer, Alberta, Canada.
> N: 52-16-18 W: 113-48-46
> Grid: DO32cg
> Rx: Rockwell Collins HF-2050
> Antennas: 7 Slinky Sloper-28m.
> T2FD Centered On 90m.
> 19.7m Tower.
>
>
>
>
>
>From: [email protected]
>Reply-To: [email protected]
>To: [email protected]
>Subject: Cliffdwellers digest, Vol 1 #20 - 1 msg
>Date: Wed, 18 Dec 2002 04:01:17 -0500 (EST)
>
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>Today's Topics:
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> 1. Re: RE: help with restricted space (Jim Hill)
>
>--__--__--
>
>Message: 1
>Date: Tue, 17 Dec 2002 23:26:58 -0800
>To:
>From: Jim Hill
>Subject: Re: [Cliffdwellers] RE: help with restricted space
>
>Hi: Here's a suggestion for an antenna mount. I bought a Butternut
>HV2V
>from another ham recently, and helped him take it down from the flat
>roof
>of his condo. He had a Radio Shack tripod antenna mount. It stands
>about 3'
>high. It was bolted to a sheet of plywood, which was prevented from
>moving
>by a number of sand bags.
>
>73's Jim
>
>
>
> > ._._.
> >----- Original Message -----
> >From: "Hart Engel"
> >To:
> >Sent: Saturday, December 07, 2002 11:09 AM
> >Subject: [Cliffdwellers] RE: help with restricted space
> > >
> > > Thanks for reading this message. I live in the top part of a
>house and
> >have access to the roof . The house is a semi-detached house, and
>the roof
> >is only 12 X 25 if even that. I have the local kids every once in
>awhile
> >climbing up on the roof, so a wire is out of the question. I want
>to get
> >back into HF, but there is no sence in me buying a rig if I can't
>put some
> >sort of antenna up. I was thinking along the lines of a butternut,
>or
> >cushcraft but there is no room for the ground plane kits.I would
>like to
> >build my if I could, here in canada I'm looking at over 500 bucks
>to buy one
> >of these antennas. Anyone got any ideas for my situtation? Please
>e-mail
> >off line at [email protected]
> > > Hart
> >
> >
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