Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!pilchuck!ssc!markz
From: markz@ssc.UUCP (Mark Zenier)
Newsgroups: sci.electronics
Subject: Re: Advice needed on wire-wrapping CPU based circuits
Keywords: wire-wrap advice needed
Message-ID: <192@ssc.UUCP>
Date: 2 Sep 90 19:21:01 GMT
References: <409@horizon.COM> <1019@lee.SEAS.UCLA.EDU>
Organization: SSC, Inc., Seattle, WA
Lines: 24

In article <1019@lee.SEAS.UCLA.EDU>, scott@pita.cns.ucla.edu (Scott Burris) writes:
> On the historical side of things, back in 1977 (I think) I used to have
> a 16K dynamic memory boards using 4KX1 chips for my Altair 8800b computer.
> In order to get it to work reliably, I taped aluminum foil to both sides
> of the memory board (insulating it of course), and grounded it.  Worked
> like a charm.

3M makes copper foil tapes.  The neat thing is that they are set up
to be conductive through the adhesive. (Thanks to the responders to
my net query last year)

part 1181 is a bare copper with metal particles in the adhesive.
part 1345 is tinned copper with a quilted embossing.

I prefer 1345, but use 1181 because that what the local distributor
has in stock.  (Advance Group a.k.a. Advance Wire and Cable, but
they have a pretty high minimum, around $50).

Mouser and DigiKey have a limited selection (I think 1181).

I use this to lay out a grid around the wirewrap sockets, and for some 
power supply busses.

markz@ssc.uucp