They are too short for some kinds of soils, like sand and thick grass. Another
problem, if they come loose, they make great tire puncture devices for the yard
tractor. The 6 inch staples stay put.
73 K4XS/KH7XS
-----Original Message-----
From: towertalk-request <towertalk-request@contesting.com>
To: towertalk <towertalk@contesting.com>
Sent: Wed, Feb 14, 2018 8:27 pm
Subject: TowerTalk Digest, Vol 182, Issue 20
Send TowerTalk mailing list submissions to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of TowerTalk digest..."
Today's Topics:
1. Re: Topband: 160 vertical advice (Rob Atkinson)
2. Sod staples (Rob Atkinson)
3. Re: Topband: 160 vertical advice (john@kk9a.com)
4. F-12 EF 240/230 (Wayne Kline)
5. Al-to-Al (Kim Elmore)
6. Re: Al-to-Al (Dick's)
7. Al-to-Al (john@kk9a.com)
8. Re: Al-to-Al (Bob K6UJ)
9. Re: Al-to-Al (Tim Duffy)
10. Re: Al-to-Al (Steve Bookout)
11. Re: Al-to-Al (john@kk9a.com)
12. Re: Al-to-Al (Tim Duffy)
13. Re: Al-to-Al (Kirk Kleinschmidt)
14. Re: Al-to-Al (Patrick Greenlee)
----------------------------------------------------------------------
Message: 1
Date: Tue, 13 Feb 2018 11:21:04 -0600
From: Rob Atkinson <ranchorobbo@gmail.com>
To: towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Topband: 160 vertical advice
Message-ID:
<CALWD7Z48QKQFmcyQ6rpewYM5cmo8s2H3T72A1V8zJ9mAErypyQ@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Typically a series fed inverted L that's 1/8 vertical roughly, and the
rest horizontal over an adequate buried ground system will give a
feedpoint impedance of around 10 to 15 ohms and a mismatched to 50 ohm
vswr of 4 or 5:1. Usually when the feedpoint impedance is much higher
there's ground loss.
73
Rob
K5UJ
------------------------------
Message: 2
Date: Tue, 13 Feb 2018 12:10:15 -0600
From: Rob Atkinson <ranchorobbo@gmail.com>
To: towertalk <towertalk@contesting.com>
Subject: [TowerTalk] Sod staples
Message-ID:
<CALWD7Z4Oh2kB6QDH6yNiKpmbaXvVHG=uPrO7AQpOtyDtEhaMGQ@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
What worked for me were the large barb wire fence staples. Go to a
farmers co-op and look for them. At the one I went to they had bins
with different sizes, and the largest ones were thick with sharp
prongs about 1 1/2 inches long. Not too long but pound them into the
ground and they'll stay, and they won't bend if you hit a rock. you
can pound them into cracks in limestone and other more dense surfaces.
They are sold by the pound and when I bought mine I got a pound for
$9. I have rocky soil and the wire staples bent all the time.
73
Rob
K5UJ
------------------------------
Message: 3
Date: Tue, 13 Feb 2018 13:33:56 -0500
From: "john@kk9a.com" <john@kk9a.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Topband: 160 vertical advice
Message-ID: <2e7e1951ceea1ee650189928bca47081.squirrel@www11.qth.com>
Content-Type: text/plain;charset=utf-8
Bill has a great location and signals travel well over the sea. I do not
know the details of his antennas other than the impedance and bandwidth
seem better than they should be. Just as an example if he had 5dB of
ground loss you would still probably have no problem copying him during
peak openings.
John KK9A
To: cqtestk4xs@aol.com
Subject: Re: Topband: 160 vertical advice
From: Don Kirk <wd8dsb@gmail.com>
Date: Mon, 12 Feb 2018 17:36:58 -0500
Hi Bill,
As Wes already mentioned, your SWR bandwidth is suspicious as is your
minimum SWR. Nevertheless your signal this morning was pretty much on par
with the strongest signals I have ever heard from KH6 land on 160 meters.
When I worked you this morning signals were not that great, but after our
QSO your signal really came up. Your signal came up so much that I decided
to record one of your CQs at around 0608 UTC when you were running around
10 dB over my noise floor, and I even saw your signal increase to around 15
dB over my noise floor for a while a bit later on. Your RX capabilities
appeared to be pretty good too since you copied my measly 100 watts before
signals really came up.
I just uploaded a recording of your CQ when you were running around 10 dB
over my noise floor, and here is the youtube link to the recording
http://www.youtube.com/watch?v=iF10bDQFowU&feature=youtu.be
73,
Don (wd8dsb)
------------------------------
Message: 4
Date: Tue, 13 Feb 2018 19:14:53 +0000
From: Wayne Kline <w3ea@hotmail.com>
To: "TOWERTALK@contesting.com" <TOWERTALK@contesting.com>
Subject: [TowerTalk] F-12 EF 240/230
Message-ID:
<BL2PR20MB0866E0CB434750DCB0C0D1EB8FF60@BL2PR20MB0866.namprd20.prod.outlook.com>
Content-Type: text/plain; charset="iso-8859-1"
TT'ers
I picked up a F-12 EF 240/230 antenna. Having installed many F-12 antennas
over the years, am aware of some of the original drawings and production
models ( pre drilled rivet holes ) measurement did not match up. Speaking to
Tom a the time ( cell phone in the field ) alleviated the fears during
assembly and installation.
I am hoping this is the issue I have at the moment.
The Drawing I have has both the Elite Force EF 240/230 interlaced
dimensions and also the singular EF 240X @ 24 foot boom and the EF-230 @ 12
ft spacing.
The pre riveted boom to element brackets hold true for the 2X40 BUT the
2X30 spacing is 4 " inches short NOT 12 ft C/L but 11'8" C/L .....
Might be a moot point but just wanted to shake the tree of Knowledge
thanks
Wayne W3EA
------------------------------
Message: 5
Date: Tue, 13 Feb 2018 16:09:26 -0600
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
To: towertalk@contesting.com
Subject: [TowerTalk] Al-to-Al
Message-ID: <BF688E8B-0F3A-471C-A200-C6ED5760AFEE@sbcglobal.net>
Content-Type: text/plain; charset=us-ascii
When assembling Al -to-Al junctions in an Antenna, what anti-corrosion compound
should be used at the joints?
Kim N5OP
"People that make music together cannot be enemies, at least as long as the
music lasts." -- Paul Hindemith
------------------------------
Message: 6
Date: Tue, 13 Feb 2018 18:13:05 -0500
From: Dick's <rcblumen@centurylink.net>
To: Kim Elmore <cw_de_n5op@sbcglobal.net>
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <7DF7E91F-6F57-4C92-AC63-2BEEC928576A@centurylink.net>
Content-Type: text/plain; charset=utf-8
Ilsco De-ox
Ilsco DE-OX-8OZ Oxide Inhibitor Bottle 8 oz DE-OX
https://www.amazon.com/dp/B008KM6AQ8/ref=cm_sw_r_sms_c_api_8b3GAbX7B4WHQ
Or from another supplier.
Dick, K0CAT
??-
> On Feb 13, 2018, at 5:09 PM, Kim Elmore <cw_de_n5op@sbcglobal.net> wrote:
>
> When assembling Al -to-Al junctions in an Antenna, what anti-corrosion
> compound should be used at the joints?
>
> Kim N5OP
>
> "People that make music together cannot be enemies, at least as long as the
> music lasts." -- Paul Hindemith
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 7
Date: Tue, 13 Feb 2018 18:40:46 -0500
From: <john@kk9a.com>
To: <towertalk@contesting.com>
Cc: <cw_de_n5op@sbcglobal.net>
Subject: [TowerTalk] Al-to-Al
Message-ID: <00d701d3a524$1490b570$3db22050$@com>
Content-Type: text/plain; charset="us-ascii"
For many years in Illinois I used nothing and never had an issue. When I
bought a home in Aruba and saw what corrosion was really like I started
using Penetrox. I had no element corrosion connection issues and when I took
the antennas apart years later the tubing easily separated. There was still
bad element aluminum corrosion caused by the stainless steel hose clamps
however that is a different issue. Now I use Penetrox on all permanent
antennas, regardless of location.
John KK9A
To: towertalk@contesting.com
Subject: [TowerTalk] Al-to-Al
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Tue, 13 Feb 2018 16:09:26 -0600
When assembling Al -to-Al junctions in an Antenna, what anti-corrosion
compound
should be used at the joints?
Kim N5OP
------------------------------
Message: 8
Date: Tue, 13 Feb 2018 23:44:45 +0000 (UTC)
From: Bob K6UJ <k6uj@pacbell.net>
To: Kim Elmore <cw_de_n5op@sbcglobal.net>, "towertalk@contesting.com"
<towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <1538611273.416869.1518565485271@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
Kim,
You will get several suggestions on this.? I use Penetrox.? Used it on aluminum
antenna element joints for years.? Does a great job of preventing corrosion and
preserving the aluminum.? I have taken apart yagis that have been up for over
20 years and the exterior of the aluminum tubes were corroded, naturally, but
the internal mating surfaces where the penetrox was used were shiny and bright,
like new.? I first started using it years ago on KLM antennas, they provided a
tube with their antennas, and still use it.DX engineering has it
:https://www.dxengineering.com/parts/dxe-p8a
BobK6UJ
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
To: towertalk@contesting.com
Sent: Tuesday, February 13, 2018 2:09 PM
Subject: [TowerTalk] Al-to-Al
When assembling Al -to-Al junctions in an Antenna, what anti-corrosion compound
should be used at the joints?
Kim N5OP
"People that make music together cannot be enemies, at least as long as the
music lasts." -- Paul Hindemith
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 9
Date: Tue, 13 Feb 2018 19:56:45 -0500
From: "Tim Duffy" <k3lr@k3lr.com>
To: "'Bob K6UJ'" <k6uj@pacbell.net>, "'Kim Elmore'"
<cw_de_n5op@sbcglobal.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <8EA31119F23C4080BAC38ACD603B2A39@laptop>
Content-Type: text/plain; charset="iso-8859-1"
I used Penetrox for years - noticed that after 10 years or more that the
Penetrox would dry out and turn to a crusty dust. I mentioned that to W3LPL.
Frank said try Jet Lube SS-30 - which is what he uses at his mega station
for all of his antennas.
I have been sold on Jet Lube SS-30 ever since. After 25 years here at K3LR -
the Jet Lube SS-30 comes apart and is clean and offers a great low loss
connection. I use it everywhere hardware and connections are involved (even
in the shack) - as does W3LPL. Do not worry that this is copper based paste
- it works SUPER for Al to Al.
https://www.dxengineering.com/parts/jtl-12555
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Bob
K6UJ
Sent: Tuesday, February 13, 2018 6:45 PM
To: Kim Elmore; towertalk@contesting.com
Subject: Re: [TowerTalk] Al-to-Al
Kim,
You will get several suggestions on this.? I use Penetrox.? Used it on
aluminum antenna element joints for years.? Does a great job of preventing
corrosion and preserving the aluminum.? I have taken apart yagis that have
been up for over 20 years and the exterior of the aluminum tubes were
corroded, naturally, but the internal mating surfaces where the penetrox was
used were shiny and bright, like new.? I first started using it years ago on
KLM antennas, they provided a tube with their antennas, and still use it.DX
engineering has it :https://www.dxengineering.com/parts/dxe-p8a
BobK6UJ
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
To: towertalk@contesting.com
Sent: Tuesday, February 13, 2018 2:09 PM
Subject: [TowerTalk] Al-to-Al
When assembling Al -to-Al junctions in an Antenna, what anti-corrosion
compound should be used at the joints?
Kim N5OP
"People that make music together cannot be enemies, at least as long as the
music lasts." -- Paul Hindemith
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 10
Date: Tue, 13 Feb 2018 20:36:23 -0500
From: Steve Bookout <steve@nr4m.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <6d0cbb0b-5327-500d-0d3e-2ecdf5b1d470@nr4m.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I must agree with Tim on this.? This stuff has never let me down.
To make a bit easier to apply, and although it may be a 'sin', I apply
it to the inner element, then spray WD-40 on it and spread it with vinyl
gloved hand.
Goes on a bit more even this way.
73 de Steve, NR4M
On 2/13/2018 7:56:PM, Tim Duffy wrote:
> I used Penetrox for years - noticed that after 10 years or more that the
> Penetrox would dry out and turn to a crusty dust. I mentioned that to W3LPL.H
> Frank said try Jet Lube SS-30 - which is what he uses at his mega station
> for all of his antennas.
>
> I have been sold on Jet Lube SS-30 ever since. After 25 years here at K3LR -
> the Jet Lube SS-30 comes apart and is clean and offers a great low loss
> connection. I use it everywhere hardware and connections are involved (even
> in the shack) - as does W3LPL. Do not worry that this is copper based paste
> - it works SUPER for Al to Al.
>
> https://www.dxengineering.com/parts/jtl-12555
>
> 73
> Tim K3LR
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Bob
> K6UJ
> Sent: Tuesday, February 13, 2018 6:45 PM
> To: Kim Elmore; towertalk@contesting.com
> Subject: Re: [TowerTalk] Al-to-Al
>
> Kim,
> You will get several suggestions on this.? I use Penetrox.? Used it on
> aluminum antenna element joints for years.? Does a great job of preventing
> corrosion and preserving the aluminum.? I have taken apart yagis that have
> been up for over 20 years and the exterior of the aluminum tubes were
> corroded, naturally, but the internal mating surfaces where the penetrox was
> used were shiny and bright, like new.? I first started using it years ago on
> KLM antennas, they provided a tube with their antennas, and still use it.DX
> engineering has it :https://www.dxengineering.com/parts/dxe-p8a
>
>
> BobK6UJ
>
>
>
> From: Kim Elmore <cw_de_n5op@sbcglobal.net>
> To: towertalk@contesting.com
> Sent: Tuesday, February 13, 2018 2:09 PM
> Subject: [TowerTalk] Al-to-Al
>
> When assembling Al -to-Al junctions in an Antenna, what anti-corrosion
> compound should be used at the joints?
>
> Kim N5OP
>
> "People that make music together cannot be enemies, at least as long as the
> music lasts." -- Paul Hindemith
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
------------------------------
Message: 11
Date: Tue, 13 Feb 2018 21:17:06 -0500
From: <john@kk9a.com>
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <000501d3a539$e9472870$bbd57950$@com>
Content-Type: text/plain; charset="us-ascii"
Great tip, Tim. I have seen dry Penetrox on old antennas but I assume that
it does not affect the joint's conductivity. Jet Lube SS-30 has excellent
Amazon reviews. I wonder how the following note on the manufacture's website
relates to aluminum tubing antennas, especially those in corrosive
environments: "Not intended for use with aluminum where galvanic corrosion
could be a significant issue".
John KK9A
To: "'Bob K6UJ'" <k6uj@pacbell.net>, "'Kim Elmore'"
<cw_de_n5op@sbcglobal.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
From: "Tim Duffy" <k3lr@k3lr.com>
Reply-to: k3lr@k3lr.com
Date: Tue, 13 Feb 2018 19:56:45 -0500
I used Penetrox for years - noticed that after 10 years or more that the
Penetrox would dry out and turn to a crusty dust. I mentioned that to W3LPL.
Frank said try Jet Lube SS-30 - which is what he uses at his mega station
for all of his antennas.
I have been sold on Jet Lube SS-30 ever since. After 25 years here at K3LR -
the Jet Lube SS-30 comes apart and is clean and offers a great low loss
connection. I use it everywhere hardware and connections are involved (even
in the shack) - as does W3LPL. Do not worry that this is copper based paste
- it works SUPER for Al to Al.
https://www.dxengineering.com/parts/jtl-12555
73
Tim K3LR
------------------------------
Message: 12
Date: Tue, 13 Feb 2018 21:41:14 -0500
From: "Tim Duffy" <k3lr@k3lr.com>
To: <john@kk9a.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <6C1390508E0B4297A22ADDBF62FEA177@laptop>
Content-Type: text/plain; charset="us-ascii"
I have had conversations with W3LPL and others (mechanical engineers) about
that comment - and we all agree that we have never had a problem with SS-30.
The AL to AL joints are clean even after 20 plus years - perfect. I think
SS-30 might be a problem with dissimilar metals or highly corrosive
environments.
I can also tell you that major cell phone carriers (one of which I worked at
in the past) - are all using SS-30 for their site builds. They stopped using
Penetrox long ago.
If SS-30 wasn't the best - I wouldn't have used it on the 50 plus antennas
here at K3LR.
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
john@kk9a.com
Sent: Tuesday, February 13, 2018 9:17 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Al-to-Al
Great tip, Tim. I have seen dry Penetrox on old antennas but I assume that
it does not affect the joint's conductivity. Jet Lube SS-30 has excellent
Amazon reviews. I wonder how the following note on the manufacture's website
relates to aluminum tubing antennas, especially those in corrosive
environments: "Not intended for use with aluminum where galvanic corrosion
could be a significant issue".
John KK9A
To: "'Bob K6UJ'" <k6uj@pacbell.net>, "'Kim Elmore'"
<cw_de_n5op@sbcglobal.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
From: "Tim Duffy" <k3lr@k3lr.com>
Reply-to: k3lr@k3lr.com
Date: Tue, 13 Feb 2018 19:56:45 -0500
I used Penetrox for years - noticed that after 10 years or more that the
Penetrox would dry out and turn to a crusty dust. I mentioned that to W3LPL.
Frank said try Jet Lube SS-30 - which is what he uses at his mega station
for all of his antennas.
I have been sold on Jet Lube SS-30 ever since. After 25 years here at K3LR -
the Jet Lube SS-30 comes apart and is clean and offers a great low loss
connection. I use it everywhere hardware and connections are involved (even
in the shack) - as does W3LPL. Do not worry that this is copper based paste
- it works SUPER for Al to Al.
https://www.dxengineering.com/parts/jtl-12555
73
Tim K3LR
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 13
Date: Wed, 14 Feb 2018 02:47:17 +0000 (UTC)
From: Kirk Kleinschmidt <sohosources@yahoo.com>
To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <721177450.545007.1518576437856@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
In looking up details about SS-30, I notice that the company makes a very
similar sounding product called Kopr-Kote, which is about haf the price.
Not that the price for SS-30 is unreasonable, but I'm just wondering if anyone
knows whether the products are interchangeable for ham radio use, or if SS-30
is decidedly better for some reason(s).
Thanks,
--Kirk in MN?My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Tuesday, February 13, 2018 8:18 PM, "john@kk9a.com" <john@kk9a.com>
wrote:
Great tip, Tim. I have seen dry Penetrox on old antennas but I assume that
it does not affect the joint's conductivity. Jet Lube SS-30 has excellent
Amazon reviews. I wonder how the following note on the manufacture's website
relates to aluminum tubing antennas, especially those in corrosive
environments: "Not intended for use with aluminum where galvanic corrosion
could be a significant issue".
John KK9A
To:??? "'Bob K6UJ'" <k6uj@pacbell.net>, "'Kim Elmore'"
<cw_de_n5op@sbcglobal.net>,??? <towertalk@contesting.com>
Subject:??? Re: [TowerTalk] Al-to-Al
From:??? "Tim Duffy" <k3lr@k3lr.com>
Reply-to:??? k3lr@k3lr.com
Date:??? Tue, 13 Feb 2018 19:56:45 -0500
I used Penetrox for years - noticed that after 10 years or more that the
Penetrox would dry out and turn to a crusty dust. I mentioned that to W3LPL.
Frank said try Jet Lube SS-30 - which is what he uses at his mega station
for all of his antennas.
I have been sold on Jet Lube SS-30 ever since. After 25 years here at K3LR -
the Jet Lube SS-30 comes apart and is clean and offers a great low loss
connection. I use it everywhere hardware and connections are involved (even
in the shack) - as does W3LPL. Do not worry that this is copper based paste
- it works SUPER for Al to Al.
https://www.dxengineering.com/parts/jtl-12555
73
Tim K3LR
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 14
Date: Wed, 14 Feb 2018 08:30:13 -0600
From: Patrick Greenlee <patrick_g@windstream.net>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Al-to-Al
Message-ID: <ec8e9fcf-25f7-0a40-f3a4-82afb28b6940@windstream.net>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2/13/2018 8:47 PM, Kirk Kleinschmidt via TowerTalk wrote:
> "Not intended for use with aluminum where galvanic corrosion
> could be a significant issue".
>
If I saw comments from the MFG telling me to not use the product where
galvanic corrosion could be significant I'd listen up.
Galvanic corrosion is another way of saying dissimilar metals corrosion.
? If?? A L L ? metals in contact with each other are the same then no
galvanic corrosion. I'd be leery of a powdered copper in a paste agent
on an aluminum to aluminum or aluminum to xxxx joint.
Back when the big rocks were still hot I took a sabbatical and did some
marine field service engineering.? (Commercial radiotelephone lisc with
ship's radar endorsement) I saw lots of antenna installations where coax
shields were connected to aluminum antenna mounts welded to the vessel's
aluminum superstructure. Typically a stainless steel bolt would hold a
tin coated copper terminal (ring or spade) to the aluminum antenna
mount, sometimes with silicone caulk over the connection.? Galvanic
corrosion ate big pits or made holes in the aluminum.? Improperly
protected shield would be mush or gone and sometimes the terminals were
eaten or nearly so themselves.
The longest lasting connections seemed to be with stainless bolts with
stainless flat washers on both sides of the aluminum.? The ring or spade
terminal would then only contact the stainless. Generous cover of
silicone caulk over all exposed coax shield, crimp terminals, and all of
the stainless mounting hardware.? YMMV? but this is what I saw.?? Oh,
some techs painted all exposed non aluminum components in the mix with
liquid tape before covering with silicone caulk.? They used the GE 50?
year caulk, not the cheaper varieties.
Patrick??????? NJ5G
------------------------------
Subject: Digest Footer
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------------------------------
End of TowerTalk Digest, Vol 182, Issue 20
******************************************
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