PDP-8 /e/f/m memory - test-drb@ccmp.vtda.org

16 Aug 2006

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Subject: Re: PDP-8 /e/f/m memory
   From: "Roy J. Tellason" <rtellason at verizon.net>
   Date: Tue, 15 Aug 2006 12:33:20 -0400
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

On Tuesday 15 August 2006 08:26 am, Allison wrote:
  I shave off the top of the DS1287s and replace
the cell.  It's easy to find
 the battery on those as it's magnetic! 
Interesting!  What tooling do you use to do this?

The 1287s I did this to were made with a second layer of plastic over the
origninal 28pin dip.  Simple problem to grind through the plast to the 
battery, remove it and solder leads to the remaining connections.

At various times I've used, hot soldering iron, belt sander, coarse file
to get down to the battery.  Rude and crude ut then again I the chip was
bad already so it wasn't like I was going to loose anything.

Allison