James,
This may not be a viable solution, but for years my father-in-law used Vaseline on all his electronic connections on his boat which was in a salt water environment. He never loss radio communication or had lighting issues. Yes is can be messy, but when things get rotten it is nice to know your radio will still work. A Silicon grease might be a more modern day material to use. Neither of these are Manufacturing solutions I would rush out to use, but maybe they can point to something simple rather than complex.
Phil Nutting
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Marsico, James
Sent: Wednesday, December 10, 2003 7:28 AM
To: [log in to unmask]
Subject: Re: [TN] GOOD RF GROUND
This specific application doesn't warrant a Teflon substrate, I think it is
FR-4. Let me clarify one thing, It's assumed that the material is cold
flowing, causing ground interruptions (this is an RF Engineer's assumption).
The fact is that, after time in service, the main complaint from the test
guys is electrical problems associated with a degenerated ground. It could
be associated with moisture entering the housing causing the tin-lead
plating on the ground plane, which is in direct contact to the housing via
screws, to become slightly oxidized. This is not a hermetically sealed
housing. In fact, there is a hole in it to allow for a pot adjustment.
Which leads to another question... are there bulk-mounted pots available,
mounted directly to the housing wall, which would eliminate the hole?
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>
631-595-5879
-----Original Message-----
From: Crepeau, Phil [SMTP:[log in to unmask]]
Sent: Tuesday, December 09, 2003 4:47 PM
To: [log in to unmask]
Subject: Re: [TN] GOOD RF GROUND
hi,
is the fastener loosening up because the laminate is teflon based
(which is common in rf applications)?
phil
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following
text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information,
or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
|
