TECHNET Archives

December 2004

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Ingemar Hernefjord (KC/EMW)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ingemar Hernefjord (KC/EMW)
Date:
Fri, 17 Dec 2004 14:20:54 +0100
Content-Type:
text/plain
Parts/Attachments:
text/plain (17 lines)
Making microwave 'boxes' got its challenge. Oftenly. Now, SMA coax through aluminium wall, center pin soldered on teflon board. Mismatch. Naturally. But design guys do not always listen. So, after tempchanges, the expected failure happens of course. Not necessary to tell what. There are many solutions when you make new design, but I have to give clever advice for what's already frozen and in production. Other solder? Z-link? Silver epoxy? etc...Omitted all but one: much longer terminal strip. If you solder a strip which in n times longer, you'll 1)get a much stronger joint,  2)no dentrimental impact on the signal(>40 GHz), 3) coax plugin/plugout longitudinal forces will not have same negative impact. When I say solder, I mean soldering all along the strip, literally bury the longer strip in solder.
What does the expertise think? Am I right?
Will ask humble Oklahoma fast triggering Lucky Steve if he's willing to add pic to world famous cabinet..

Ingemar Hernefjord
Ericsson Microwave Systems

---------------------------------------------------
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 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2