Art,I use butyl tape. I put a few wraps of electrical tape, then butyl, then
electrical tape over the top of that.I have never had a failure using this
combo, survives Alaskan winters and the rainy season.KevinKL7KY ex NL7Z
Sent via the Samsung Galaxy S® 5 ACTIVE™, an AT&T 4G LTE smartphone
-------- Original message --------
From: topband-request@contesting.com
Date: 10/20/16 08:00 (GMT-09:00)
To: topband@contesting.com
Subject: Topband Digest, Vol 166, Issue 18
Send Topband mailing list submissions to
topband@contesting.com
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.contesting.com/mailman/listinfo/topband
or, via email, send a message with subject or body 'help' to
topband-request@contesting.com
You can reach the person managing the list at
topband-owner@contesting.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Topband digest..."
Today's Topics:
1. xxx (Dave Heil)
2. Re: inv. L (Art Snapper)
3. Fwd: Re: inv. L ( K1FZ-Bruce )
4. Re: Fwd: Re: inv. L (Ronald Gorski)
----------------------------------------------------------------------
Message: 1
Date: Thu, 20 Oct 2016 04:51:20 +0000
From: Dave Heil <k8mn@frontiernet.net>
To: Ken Scheper <kenshep@one.net>, topband@contesting.com
Subject: Topband: xxx
Message-ID: <ed1206f5-5254-f923-0e2c-f699d4b0842d@frontiernet.net>
Content-Type: text/plain; charset=utf-8; format=flowed
------------------------------
Message: 2
Date: Thu, 20 Oct 2016 09:16:08 -0400
From: Art Snapper <art@nk8x.net>
To: 160 <topband@contesting.com>
Subject: Re: Topband: inv. L
Message-ID:
<CAH6Jzy=M+Wb6F6tTD3y0qE3_BvWGWdrnN+-j7J2e5fV2mXMyEg@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
I had a few hours free yesterday afternoon, so I began the dual 80/160
radiator inv. L project.
In the process, I found that water had entered the coaxial center insulator
that was used at the feedpoint of the antenna.
Does anyone have a favorite solution for a weatherproof, coaxial feedpoint
for this type of antenna???
The radials are attached to several load center ground bars, that are
screwed into a copper pipe that is driven into the ground.
The pipe gives me a rigid mounting point for some kind of insulator or
standoff.
BTW, after a temporary fix, I ran some quick SWR tests. There appears to be
very little interaction between the elements. At least from an SWR
perspective.
de Art NK8X
?
On Mon, Oct 17, 2016 at 11:16 AM, Art Snapper <art@nk8x.net> wrote:
> I was considering adding a second vertical element to my 160 inverted L.
> This one would be roughly a quarter wave tall for use on 80.
>
> I tried modelling in Eznec, but wasn't comfortable with the results. I may
> have screwed it up.
>
> Has anyone tried it for real? Is it a big compromise on either band? Would
> a switch at the feedpoint have any benefit?
>
> My inverted L has about 50 radials.
>
> 73
> Art NK8X
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
------------------------------
Message: 3
Date: Thu, 20 Oct 2016 09:53:17 -0400
From: " K1FZ-Bruce " <k1fz@myfairpoint.net>
To: Topband <topband@contesting.com>
Subject: Topband: Fwd: Re: inv. L
Message-ID: <20161020095317.93cyi67q8gww8sks@webmail.myfairpoint.net>
Content-Type: text/plain; charset=UTF-8
I waterproof with silicon as best possible, and the most important? part is?
make an upside down U turn in the coax at the end. Water does not "like" to
flow up hill in most cases.
?
73
Bruce-k1fz
On Thu, 20 Oct 2016 09:16:08 -0400, Art Snapper wrote:
I had a few hours free yesterday afternoon, so I began the dual 80/160
radiator inv. L project.
In the process, I found that water had entered the coaxial center insulator
that was used at the feedpoint of the antenna.
Does anyone have a favorite solution for a weatherproof, coaxial feedpoint
for this type of antenna???
The radials are attached to several load center ground bars, that are
screwed into a copper pipe that is driven into the ground.
The pipe gives me a rigid mounting point for some kind of insulator or
standoff.
BTW, after a temporary fix, I ran some quick SWR tests. There appears to be
very little interaction between the elements. At least from an SWR
perspective.
de Art NK8X
?
On Mon, Oct 17, 2016 at 11:16 AM, Art Snapper wrote:
> I was considering adding a second vertical element to my 160 inverted L.
> This one would be roughly a quarter wave tall for use on 80.
>
> I tried modelling in Eznec, but wasn't comfortable with the results. I may
> have screwed it up.
>
> Has anyone tried it for real? Is it a big compromise on either band? Would
> a switch at the feedpoint have any benefit?
>
> My inverted L has about 50 radials.
>
> 73
> Art NK8X
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
_________________
------------------------------
Message: 4
Date: Thu, 20 Oct 2016 13:59:46 +0000
From: Ronald Gorski <R.Gorski@Astronautics.com>
To: "k1fz@myfairpoint.net" <k1fz@myfairpoint.net>, Topband
<topband@contesting.com>
Subject: Re: Topband: Fwd: Re: inv. L
Message-ID:
<9f4ed140e4ab4b9d88dd11e19f46d873@HQ-EX2013A.aca.astronautics.com>
Content-Type: text/plain; charset="utf-8"
There is a product called "Liquid Tape" that is available from hardware stores
and home improvement centers. It has to be applied in layers but aggressively
adheres to the coax end. You need to pay special attention covering the braid
since water will wick.
Ron N9AU
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of K1FZ-Bruce
Sent: Thursday, October 20, 2016 8:53 AM
To: Topband
Subject: Topband: Fwd: Re: inv. L
I waterproof with silicon as best possible, and the most important? part is?
make an upside down U turn in the coax at the end. Water does not "like" to
flow up hill in most cases.
?
73
Bruce-k1fz
On Thu, 20 Oct 2016 09:16:08 -0400, Art Snapper wrote:
I had a few hours free yesterday afternoon, so I began the dual 80/160
radiator inv. L project.
In the process, I found that water had entered the coaxial center insulator
that was used at the feedpoint of the antenna.
Does anyone have a favorite solution for a weatherproof, coaxial feedpoint for
this type of antenna???
The radials are attached to several load center ground bars, that are screwed
into a copper pipe that is driven into the ground.
The pipe gives me a rigid mounting point for some kind of insulator or
standoff.
BTW, after a temporary fix, I ran some quick SWR tests. There appears to be
very little interaction between the elements. At least from an SWR perspective.
de Art NK8X
?
On Mon, Oct 17, 2016 at 11:16 AM, Art Snapper wrote:
> I was considering adding a second vertical element to my 160 inverted L.
> This one would be roughly a quarter wave tall for use on 80.
>
> I tried modelling in Eznec, but wasn't comfortable with the results. I
> may have screwed it up.
>
> Has anyone tried it for real? Is it a big compromise on either band?
> Would a switch at the feedpoint have any benefit?
>
> My inverted L has about 50 radials.
>
> 73
> Art NK8X
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
_________________
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
------------------------------
Subject: Digest Footer
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband
------------------------------
End of Topband Digest, Vol 166, Issue 18
****************************************
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|