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CX2SA > SATDIG 10.07.09 04:44l 220 Lines 7117 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Cleaning oxidation from antenna (Clint Bradford)
2. Re: Cleaning oxidation from antenna (Leroy Stenzel)
3. Re: Cleaning oxidation from antenna (Jim Jerzycke)
4. Re: Cleaning oxidation from antenna (Joe)
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Message: 1
Date: Thu, 9 Jul 2009 09:42:33 -0700 (GMT-07:00)
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Cleaning oxidation from antenna
To: amsat-bb@xxxxx.xxxx amsat-bb@xxxxx.xxx
Message-ID:
<26991066.1247157753273.JavaMail.root@xxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx
>
Content-Type: text/plain; charset=UTF-8
>> ... Nothing seems to be pitted or deteriorated, just "ugly".
Fine steel wool. Then spray Marine Spar Varnish on it (after connecting cable
and properly sealing that connection).
Clint Bradford
http:/www.k6lcs.com
----------------------------------
Clint Bradford, K6LCS
http://www.clintbradford.com
------------------------------
Message: 2
Date: Thu, 9 Jul 2009 12:25:12 -0500
From: "Leroy Stenzel" <lstenzel@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Cleaning oxidation from antenna
To: <amsat-bb@xxxxx.xxx>
Message-ID: <200907091725.n69HP9Mn071710@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
If they are Cushcraft yagis, just cleaning the surface may not be enough. I
brought my antennas out of storage only to find that they had strange
patterns and high reflected power. Someone was kind enough to suggest that
I check for corrosion in the sleeve at the middle of each director and the
reflector. While each element appears to be at solid rod with a sleeve at
the mounting point, it is actually two rods crimped together by the sleeve.
That was the problem, and I have not been able to find a solution. I
started over and built my own antennas out of old television antenna
elements using the Cushcraft booms and driven elements. I used the W7RAI
program for Yagi design. My system is not pretty, but it appears to do the
job better than the pretty but corroded mess I had.
Check your patterns with a field strength meter, and check for reflected
power. If there are other solutions, I would like to hear them.
Leroy, W5VG
AMSAT #2916
-----Original Message-----
From: w6zkh@xxxxxxx.xxx [mailto:w6zkh@xxxxxxx.xxxx
Sent: Thursday, July 09, 2009 7:05 AM
To: amsat-bb
Subject: [amsat-bb] Cleaning oxidation from antenna
Recently picked up 2 yagi's that were near coastal locations, and the boom
and elements are oxidized. What is the best method to clean this? Just 'good
ole elbow grease and Scotchbrite pad' or something else. Nothing seems to be
pitted or deteriorated, just "ugly".
John W6ZKH
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------------------------------
Message: 3
Date: Thu, 9 Jul 2009 10:59:33 -0700 (PDT)
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Cleaning oxidation from antenna
To: amsat-bb@xxxxx.xxxx Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Message-ID: <78945.91981.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
ScotchBrite pads also work very well, and don't leave lots of little
conductive strands floating around.
Jim? KQ6EA
--- On Thu, 7/9/09, Clint Bradford <clintbrad4d@xxxxxxxxx.xxx> wrote:
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Cleaning oxidation from antenna
To: amsat-bb@xxxxx.xxxx amsat-bb@xxxxx.xxx
Date: Thursday, July 9, 2009, 9:42 AM
>> ... Nothing seems to be pitted or deteriorated, just "ugly".
Fine steel wool. Then spray Marine Spar Varnish on it (after connecting cable
and properly sealing that connection).
Clint Bradford
http:/www.k6lcs.com
----------------------------------
Clint Bradford, K6LCS
http://www.clintbradford.com
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------------------------------
Message: 4
Date: Thu, 09 Jul 2009 13:02:22 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: Cleaning oxidation from antenna
To: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Cc: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <4A5630AE.1080706@xxx.xxx>
Content-Type: text/plain; charset=us-ascii; format=flowed
The scotchbrite with some sort of a liquid like mineral oil really helps
cut it fast and at the same time remove the oxidation away so it doesn't
clog the scotchbrite.
Jim Jerzycke wrote:
>ScotchBrite pads also work very well, and don't leave lots of little
conductive strands floating around.
>Jim KQ6EA
>
>
>--- On Thu, 7/9/09, Clint Bradford <clintbrad4d@xxxxxxxxx.xxx> wrote:
>
>From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
>Subject: [amsat-bb] Re: Cleaning oxidation from antenna
>To: amsat-bb@xxxxx.xxxx amsat-bb@xxxxx.xxx
>Date: Thursday, July 9, 2009, 9:42 AM
>
>
>
>>>... Nothing seems to be pitted or deteriorated, just "ugly".
>>>
>>>
>
>Fine steel wool. Then spray Marine Spar Varnish on it (after connecting cable
and properly sealing that connection).
>
>Clint Bradford
>http:/www.k6lcs.com
>
>----------------------------------
>Clint Bradford, K6LCS
>http://www.clintbradford.com
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>_______________________________________________
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>
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End of AMSAT-BB Digest, Vol 4, Issue 330
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