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Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!panda!talcott!harvard!seismo!brl-tgr!tgr!BillW@SU-SCORE.ARPA
From: BillW@SU-SCORE.ARPA (William Chops Westfield)
Newsgroups: net.micro
Subject: Re: How to fab One-Of-A-Kind systems?
Message-ID: <10460@brl-tgr.ARPA>
Date: Tue, 7-May-85 02:17:15 EDT
Article-I.D.: brl-tgr.10460
Posted: Tue May  7 02:17:15 1985
Date-Received: Thu, 9-May-85 02:33:45 EDT
Sender: news@brl-tgr.ARPA
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Go wire wrap.  I don't know where you heard tha wire wrap
get unreliable as it ages, but I dont think that is true.
From most indications, a wire wrap connection is as
reliable as a soldered connection (the possible exception
being in a high vibration environment).  If you expect
the prototype to last 50 years, aging might get you...
At Stanford we have designed and built quite a bit of
hardware, and it all gets wirewrapped first (that way
you get to correct the mistakes a lot more easilly too).

Designing a circuit board for any but the simplest
circuit is both difficult and very expensive.  Using
sockets on the board would probably lower the reliabilty
to that of wire-wrap (hmm - thats probably where the aging
question came in - things in sockets (wire wrap or solder
tail) tend to be less reliable than tyhings that are
directly soldered to.

BillW