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From: bright@dataio.UUCP (Walter Bright)
Newsgroups: net.micro
Subject: Re: How to fab One-Of-A-Kind systems?
Message-ID: <657@dataio.UUCP>
Date: Thu, 9-May-85 12:37:13 EDT
Article-I.D.: dataio.657
Posted: Thu May  9 12:37:13 1985
Date-Received: Fri, 10-May-85 02:33:03 EDT
References: <10460@brl-tgr.ARPA>
Reply-To: bright@dataio.UUCP (Walter Bright)
Organization: Data I/O Corp., Redmond WA
Lines: 21

In article <10460@brl-tgr.ARPA> BillW@SU-SCORE.ARPA (William Chops Westfield) writes:
>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.

Wirewrap is as reliable as soldered connections provided:
	1) A high torque wire wrap gun is used.
	2) Good quality wirewrap sockets are used (the kind with
	   square posts).
	3) The full 1" of bare wire is wrapped around the pin.
A good wire wrap connection will actually form a cold weld between the
wire and the pin. You can tell this by unwrapping the wire. It should
"tink" each time you pull it off one of the corners on the pin.

A well wrapped board is immune to vibration.

If you expect your circuit to last, do not used hand-held or battery
operated wirewrap tools. They do not wrap the wire tightly enough, and
I have seen many boards wrapped with them start becoming flaky after
3 to 5 years.