Hi Brett.
If you are going to have a problem with this antenna, it will be with 40
meters. That is where the tuning gets touchy if there is metal around. My
question to you is with that much metal under the antenna, why not go with
something that actually likes to see lots of metal under it like a
Butternut? The GAP is what people do when they are trying to get away from
a ground plane or radials, but in this instance, if you've got a large
metal roof under the antenna, maybe you should look at something that
actually likes to sit above a large metal surface. Just a thought.
73, de Lou K2LKK
At 05:56 PM 6/29/2007 -0600, you wrote:
>Agreed. One of my concerns is than the pitch of the roof is about 8/8
>if not 10/8. Getting it in the middle would also be a problem. I could
>put it at one end at the peak but suspect that might kill the tuning.
>This is for a cabin in Mountains. I would not leave the antenna up in
>the winter however as snow can be as much as 10 feet. Winds? No idea
>but we had a microburst several years ago which dropped nearly 100 125
>foot lodge pole pines. I likely will do wire this year and think about
>something else for beyond that. =20
>
>
>###
>BRETT WINCHESTER
>[log in to unmask]
>208-639-8386
>###
>
>
>-----Original Message-----
>From: For blind ham radio operators
>[mailto:[log in to unmask]] On Behalf Of Lou Kline
>Sent: Friday, June 29, 2007 5:50 PM
>To: [log in to unmask]
>Subject: Re: gap titon
>
>Hi Brett.
>
>That is a tall and heavy antenna. If you are going to mount it up
>there, I would reinforce whatever you mount it on six ways to sunday and
>guy the living daylights out of it!
>
>73, de Lou K2LKK
>
>
>
>At 03:53 PM 6/29/2007 -0600, you wrote:
> >Lou, What about on the top of a resonant 30x30 Steel roof? =3D20
> >
> >
> >###
> >BRETT WINCHESTER
> >[log in to unmask]
> >208-639-8386
> >###
> >
> >
> >-----Original Message-----
> >From: For blind ham radio operators
> >[mailto:[log in to unmask]] On Behalf Of Lou Kline
> >Sent: Thursday, June 28, 2007 8:07 PM
> >To: [log in to unmask]
> >Subject: Re: gap titon
> >
> >Hi Richard. I guess my point was that I, too, found it necessary to=20
> >get the bottom of the antenna about 7 ft into the air.
> >
> >I don't think it is conducive to ground mounting.
> >
> >73, de Lou K2LKK
> >
> >
> >At 01:28 PM 6/28/2007 -0500, you wrote:
> > >Hi;
> > >The thing that surprised me was that there was a gap titan for sale=20
> > >on=3D20 the arrl site and when talking with the owner I was advised=20
> > >that his=3D20 was mounted two feet above ground. If I have the =
>bottom=20
> > >of this=3D20 antenna pictured correctly it would seem that the=20
> > >horizontal sections=3D20 would get in the path with it that close to
>the ground.
> > >I'm still looking for a qualified installer or two and I've=20
> > >learned=3D20 that looking at an antenna in the box can be very
>annoying.
> > >Both the gap and butternut seem interesting although their=20
> > >approaches=3D20 are very different.
> > >Richard
> > >----- Original Message -----
> > >From: "Lou Kline" <[log in to unmask]>
> > >To: <[log in to unmask]>
> > >Sent: Wednesday, June 27, 2007 9:22 PM
> > >Subject: Re: gap titon
> > >
> > >
> > >Hi.
> > >
> > >It isn't really a counterpoise in the classic sense but rather a=3D20 =
>
> > >capacity hat (except it is on the bottom). I have mine mounted on=20
> > >a=3D20 ten foot section of heavy walled masting, which is fastened to =
>
> > >the tilt
> >
> > >over base that GAP sells. That base works extremely well,=20
> > >provided=3D20 that you dig a good hole and mount it in about four of=20
> > >the 80 lb. bags
> >of concrete.
> > >
> > >Mine has been severly tested--it went through all three rounds =
>of=3D20=20
> > >severe thunderstorms that we had last week and stayed up, which=20
> > >makes=3D20 it decidedly more rugged than some of the trees around =
>here!
> > >
> > >I think the GAP can be a very reliable antenna if you mount it=3D20=20
> > >properly, but it pays to over engineer it and try to make it as=20
> > >bomb=3D20 proof as possible.
> > >
> > >73, de Lou K2LKK
> > >
> > >
> > >
> > >At 11:03 AM 6/27/2007 -0500, you wrote:
> > > >Hi;
> > > >I believe Lou and others on this list are using this antenna. I=20
> > > >ran=3D20 into someone using the antenna mounted six inches above=20
> > > >ground. Am I
> >
> > > >correct that there is a counterpoise at the base? Wonder how=20
> > > >one=3D20 avoids lawn mower issues with the counterpoise essentially =
>
> > > >at the
> >ground.
> > > >A picture is indeed a thousand words.
> > > >Richard
> > > >
> > > >
> > > >
> > > >--
> > > >No virus found in this incoming message.
> > > >Checked by AVG Free Edition.
> > > >Version: 7.5.476 / Virus Database: 269.9.10/875 - Release =
>Date:=3D20
> > > >6/27/2007
> > > >9:08 PM
> > >
> > >Louis Kim Kline
> > >A.R.S. K2LKK
> > >Home e-mail: [log in to unmask]
> > >Work e-mail: [log in to unmask] Work Telephone: (585)=20
> > >697-5753
> > >
> > >
> > >
> > >--
> > >No virus found in this incoming message.
> > >Checked by AVG Free Edition.
> > >Version: 7.5.476 / Virus Database: 269.9.12/878 - Release Date:=3D20
> > >6/28/2007
> > >5:57 PM
> >
> >Louis Kim Kline
> >A.R.S. K2LKK
> >Home e-mail: [log in to unmask]
> >Work e-mail: [log in to unmask]
> >Work Telephone: (585) 697-5753
> >
> >
> >
> >--
> >No virus found in this incoming message.
> >Checked by AVG Free Edition.
> >Version: 7.5.476 / Virus Database: 269.9.14/880 - Release Date:=20
> >6/29/2007
> >2:15 PM
>
>Louis Kim Kline
>A.R.S. K2LKK
>Home e-mail: [log in to unmask]
>Work e-mail: [log in to unmask]
>Work Telephone: (585) 697-5753
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.476 / Virus Database: 269.9.14/880 - Release Date: 6/29/2007
>2:15 PM
Louis Kim Kline
A.R.S. K2LKK
Home e-mail: [log in to unmask]
Work e-mail: [log in to unmask]
Work Telephone: (585) 697-5753
|
