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From: frechett@snoopy.Colorado.EDU (Mac the Ripper/ / / /)
Newsgroups: comp.sys.handhelds
Subject: Re: Making an HP-48 Serial Cable
Message-ID: <24143@boulder.Colorado.EDU>
Date: 31 Jul 90 01:01:40 GMT
References: <8ah6Ivy00WBM41u0Vz@andrew.cmu.edu>
Sender: news@boulder.Colorado.EDU
Reply-To: frechett@snoopy.Colorado.EDU (Mac the Ripper/ / / /)
Organization: University of Colorado, boulder
Lines: 26

I have made a small setup that seems to work fine as is, and I have found 
how to modify it to fit nicely.
This is quite simple.
1. find pins that will fit snugly by themselves to the hp48 pins. The pins
   that I refer to are small hollow brass pins that have a slight spring
   that applies pressure to anything inserted into it.
2. I used 5 strand flat wire and pulled off one of the strands.  The flat
   wire helps hold the pins in the right order. (You can't get them in the 
   wrong order)
3. Solder wire to pins, and then just shrink wrap everyother wire.  The
   clearance is sooo tight that you can't do every one.  

You can stop here like I did for a while or you can make it better.

4.  plug it into hp48. And drip a small amount of epoxy onto the pins where
   they attach to the wires and outside the calculator.  Let it harden.  Then
   pull it out and put more epoxy on it.  Build it up to be bigger than the
   hole and just don't get it on the end.  (epoxy does not stick to wax paper
   so is a good way to protect an area)  Finally just file the block of epoxy
   to the shape of the hole.  This will make a nice Totally indestructable 
   pin casing for the hp end. 

I paid 5 dollars for my cable and am now happily running my modem with the 
48 and dowloading stuff quite easily.  

	ian frechett           frechett@snoopy.colorado.edu