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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26321
Location: Livermore CA USA
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 Posted: Mon Aug 06, 2012 7:18 pm Post subject: Cork Gaskets For Comant CI122 VHF Antennas |
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Does anyone have a good source for the cork gaskets used with the Comant CI 122 VHF Com antennas? When I removed them from the old RV-8 fuselage, I must have put them in a very "safe" place and now I can't find them anywhere. Guess they're pretty safe. Anyway, I need to order a couple more but I checked the Chief, Pacific Coast Avionics, and ACS web pages and found the antennas but no references to just ordering the cork gaskets.
<http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf>http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf
Thanks for any tips...
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Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 80+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Matt Dralle
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Mon Aug 06, 2012 7:33 pm Post subject: Cork Gaskets For Comant CI122 VHF Antennas |
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Probably easiest to visit your friendly National Air Parts Store or
AirplaneZone for a roll of cork gasket material and cut yourself ones
to fit. Nothing special about those gaskets.
On Mon, Aug 6, 2012 at 8:19 PM, Matt Dralle <dralle(at)matronics.com> wrote:
| Quote: |
Does anyone have a good source for the cork gaskets used with the Comant CI 122 VHF Com antennas? When I removed them from the old RV-8 fuselage, I must have put them in a very "safe" place and now I can't find them anywhere. Guess they're pretty safe. Anyway, I need to order a couple more but I checked the Chief, Pacific Coast Avionics, and ACS web pages and found the antennas but no references to just ordering the cork gaskets.
<http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf>http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf
Thanks for any tips...
-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 80+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Kelly McMullen
A&P/IA, EAA Tech Counselor
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Mauledriver(at)nc.rr.com
Guest
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| Posted: Tue Aug 07, 2012 7:11 am Post subject: Cork Gaskets For Comant CI122 VHF Antennas |
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Seems like I recall someone recommending discarding the gasket and going
for direct metal to metal.
Anyone doing that? Why?
Bill Watson
(do not archive)
On 8/6/2012 11:19 PM, Matt Dralle wrote:
| Quote: |
Does anyone have a good source for the cork gaskets used with the Comant CI 122 VHF Com antennas? When I removed them from the old RV-8 fuselage, I must have put them in a very "safe" place and now I can't find them anywhere. Guess they're pretty safe. Anyway, I need to order a couple more but I checked the Chief, Pacific Coast Avionics, and ACS web pages and found the antennas but no references to just ordering the cork gaskets.
<http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf>http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf
Thanks for any tips...
-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 80+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
-----
No virus found in this message.
Checked by AVG - www.avg.com
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rv10pro(at)gmail.com
Guest
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| Posted: Tue Aug 07, 2012 10:54 am Post subject: Cork Gaskets For Comant CI122 VHF Antennas |
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At the airlines, we do Direct Metal to Metal to effect an improved groundplane. We also treat the skin agains corrosion (Alodine), then Fillet seal the antenna flange to the skin for water-tight integrity. The biggest failure is returning the aircraft to service too soon, pressurizing the cabin for passengers and getting blow-outs in the fillet which allows moisture. The corrosion is certain in the presence of millivolts, moisture and dissemilar materials.
John
On Tue, Aug 7, 2012 at 8:10 AM, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:
[quote] --> RV10-List message posted by: Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)>
Seems like I recall someone recommending discarding the gasket and going for direct metal to metal.
Anyone doing that? Why?
Bill Watson
(do not archive)
On 8/6/2012 11:19 PM, Matt Dralle wrote:
====================================
arget="_blank">http://www.matronics.com/Navigator?RV10-List
====================================
http://forums.matronics.com
====================================
le, List Admin.
="_blank">http://www.matronics.com/contribution
====================================
[b]
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dmaib@me.com
Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida
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| Posted: Tue Aug 07, 2012 11:05 am Post subject: Re: Cork Gaskets For Comant CI122 VHF Antennas |
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| rv10pro(at)gmail.com wrote: | At the airlines, we do Direct Metal to Metal to effect an improved groundplane. �We also treat the skin agains corrosion (Alodine), then Fillet seal the antenna flange to the skin for water-tight integrity. �The biggest failure is returning the aircraft to service too soon, pressurizing the cabin for passengers and getting blow-outs in the fillet which allows moisture. �The corrosion is certain in the presence of millivolts, moisture and dissemilar materials.
John
[b] |
I did mine exactly the way John describes. Somebody (can't remember who, but probably Stein) recommended this approach. I have had no problems in nearly four years.
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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David Maib
RV-10 #40559
New Smyrna Beach, FL |
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carl.froehlich(at)verizon
Guest
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| Posted: Tue Aug 07, 2012 11:11 am Post subject: Cork Gaskets For Comant CI122 VHF Antennas |
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Recommend using the gasket.
Recall that the antenna needs an RF ground, not necessarily a DC ground. Using the gasket mitigates the corrosion aspects while still providing the needed RF ground.
Carl
On Aug 7, 2012, at 2:51 PM, John Cox <rv10pro(at)gmail.com (rv10pro(at)gmail.com)> wrote:
[quote]At the airlines, we do Direct Metal to Metal to effect an improved groundplane. We also treat the skin agains corrosion (Alodine), then Fillet seal the antenna flange to the skin for water-tight integrity. The biggest failure is returning the aircraft to service too soon, pressurizing the cabin for passengers and getting blow-outs in the fillet which allows moisture. The corrosion is certain in the presence of millivolts, moisture and dissemilar materials.
John
On Tue, Aug 7, 2012 at 8:10 AM, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:
| Quote: | --> RV10-List message posted by: Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)>
Seems like I recall someone recommending discarding the gasket and going for direct metal to metal.
Anyone doing that? Why?
Bill Watson
(do not archive)
On 8/6/2012 11:19 PM, Matt Dralle wrote:
====================================
arget="_blank">http://www.matronics.com/Navigator?RV10-List
====================================
http://forums.matronics.com
====================================
le, List Admin.
="_blank">http://www.matronics.com/contribution
====================================
|
[b]
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Tue Aug 07, 2012 12:22 pm Post subject: Cork Gaskets For Comant CI122 VHF Antennas |
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The antenna has a gasket for a reason. The base of the antenna is more
than adequately grounded by the 3-4 screws that fasten it to the doubler.
On 8/7/2012 11:51 AM, John Cox wrote:
| Quote: | At the airlines, we do Direct Metal to Metal to effect an improved
groundplane. We also treat the skin agains corrosion (Alodine), then
Fillet seal the antenna flange to the skin for water-tight integrity.
The biggest failure is returning the aircraft to service too soon,
pressurizing the cabin for passengers and getting blow-outs in the
fillet which allows moisture. The corrosion is certain in the
presence of millivolts, moisture and dissemilar materials.
John
On Tue, Aug 7, 2012 at 8:10 AM, Bill Watson <Mauledriver(at)nc.rr.com
<mailto:Mauledriver(at)nc.rr.com>> wrote:
<Mauledriver(at)nc.rr.com <mailto:Mauledriver(at)nc.rr.com>>
Seems like I recall someone recommending discarding the gasket and
going for direct metal to metal.
Anyone doing that? Why?
Bill Watson
(do not archive)
On 8/6/2012 11:19 PM, Matt Dralle wrote:
<dralle(at)matronics.com <mailto:dralle(at)matronics.com>>
Does anyone have a good source for the cork gaskets used with
the Comant CI 122 VHF Com antennas? When I removed them from
the old RV-8 fuselage, I must have put them in a very "safe"
place and now I can't find them anywhere. Guess they're
pretty safe. Anyway, I need to order a couple more but I
checked the Chief, Pacific Coast Avionics, and ACS web pages
and found the antennas but no references to just ordering the
cork gaskets.
<http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf>http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf
Thanks for any tips...
-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing
Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 80+ Hours Since Purchase - Upgrades Complete; Now In
Full Flyer Mode
-----
No virus found in this message.
Checked by AVG - www.avg.com <http://www.avg.com>
====================================
arget="_blank">http://www.matronics.com/Navigator?RV10-List
====================================
http://forums.matronics.com
====================================
le, List Admin.
="_blank">http://www.matronics.com/contribution
====================================
*
*
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| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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hotwheels
Joined: 01 Jun 2007
Posts: 240
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| Posted: Wed Aug 08, 2012 9:38 am Post subject: Re: Cork Gaskets For Comant CI122 VHF Antennas |
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My brand new Comant antenna came without any gasket. Here's the blurb from ACS:
"Comant Antennas no longer come with a gasket or template. Must order PN 09-00532 separately."
What arrived ended up looking a lot like proseal. I could have done that myself. 
Regards,
Jay
[quote="Matt Dralle"]Does anyone have a good source for the cork gaskets used with the Comant CI 122 VHF Com antennas? When I removed them from the old RV-8 fuselage, I must have put them in a very "safe" place and now I can't find them anywhere. Guess they're pretty safe. Anyway, I need to order a couple more but I checked the Chief, Pacific Coast Avionics, and ACS web pages and found the antennas but no references to just ordering the cork gaskets.
<http>http://www.cobham.com/media/9104/ci%20122%20data%20sheet.pdf
Thanks for any tips...
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Mauledriver(at)nc.rr.com
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