This document should be viewed using a non-proportional font. It looks pretty good using the Courier or Monaco fonts that came with my Mac. The diagrams are done in ascii, and they certainly aren't to scale. If they don't look comprehensible, try a viewing this with different font.

I hope this makes sense. It seems kind of convoluted, but it's really pretty easy, and no soldering has to be done on the logic board. I had never heard of anyone doing this using a wire wrap socket so I was working from scratch, and I got mine right on the first try.

It may help to go ahead and look at the clock chip on the logic board (it's the 33MHz one under the power supply). That way you can see what you're getting into and get an idea of how the clip has to fit. 

Here goes. Don't forget to put on your peril sensitive sunglasses!

Parts: (1) 14 pin wire-wrap socket, (1) 40MHz ocillator, a CPU fan (40mm square).
Tools: wire cutter, needle nose pliers (for bending), soldering iron.

The first thing to do is pull out the 2nd, 4th, and 6th legs on each side of the socket. On the left side only, go ahead and pull out the 1st leg too. (see diagram below)

Now comes the leg bending. If your socket is made like mine (the ones Radio Shack sells are), you can pull any legs out that are in your way (like the three on the corners) and stick 'em back in later. Also if you mess one or two up in the bending process you can replace them with the "spares" you pulled out.

(1) Take the two middle legs on each side, and carefully bend them so that they spread out from one another. Just guessing I'd say about 40 degrees each like so.
 _____________
|_____________|
      / \
     /   \
    /     \             (Viewed from the side, not the end, with the corner legs removed)
   /       \

(2) Now starting about half way down bend the legs so that they are angled back toward each other with the ends about 1/4" or slightly less apart.
 _____________
|_____________|
      / \
     /   \
     \   /
      \ /

(3) Then bend the tips up level so that they just touch. If they overlap you can clip them with wire cutters so that they just touch in the middle.

  LEFT                    RIGHT
 _____________            _____________
|_____________|          |_____________|
      / \                      / \
     /   \                    /   \
     \___/                    \_ _/

       ^                        ^
       |--- SOLDER TOGTHER      |--- CUT (leave enough that the level parts at)
                                         (the bottom of the clip will fit over)
                                         (the legs on the clock chip on the   )
                                         (Mac's logic board. just cut away    )
                                         (enough that they don't touch        )

Now looking from the end, bend the two sides of the clip away from one another and then from about halfway down bend the sides so that they come back toward each other, almost touching. (see the "after bending" end view below)

Next bend the 3 corner legs in so that they touch the leg next to them and solder. (see the "after bending" diagram below).

Place the ocillator in the socket. The pin on the ocillator coresponding to the dot and/or sharp corner goes in the socket where corner leg is missing. Now snap it on to the clock chip so that the dot/sharp corner is toward the back of the machine (on the 7100). Make sure the legs on the right side are making good contact with the Coresponding pins on the clock chip. On the left side make sure both pins of the clock chip are in contact with the clip. If the clip doen't seem tight enough, you may have to re-bend it so that the left and right sides are closer together.
 
The CPU fan was very easy to install. My fan came with a heat sink made to fit a '486 chip, so I removed that. The 7100 already has a heat sink on the CPU, and the fan I have fits very snugly inside of it with no extra hardware needed to hold it on. I turned mine so that it blows air down onto the top of the CPU.

-------------------------------------------------------------------------------
           LEFT             RIGHT            END         <- views
      _____________
     |_____________|
      | | | | | | |
      | | | | | | |                        <- 14 pin socket
      | | | | | | |
      | | | | | | |

      1 2 3 4 5 6 7
      _____________     _____________
     |_____________|   |_____________|
          |   |   |     |   |   |   |
          |   |   |     |   |   |   |      <- after removal of specified legs
          |   |   |     |   |   |   |
          |   |   |     |   |   |   |

      _____________     _____________      _____
     |_____________|   |_____________|    |_____|
          /   \   /     \   /   \   /      /   \
         /     \_/       \_/     \_/      |     |      <- after bending
         \_____/           \__ __/         \   /

-------------------------------------------------------------------------------

Mitch Crane
mcrane@cerf.net

Mitch's description is great - It really works!  Mine has been in operation 
for nearly three years . . . Glad I didn't spend the extra $1000 on the 
PowerMac 8100/80 (though they have a larger VRAM and RAM capacity, internal
SCSI-2, and a mid-tower case).

Patrick Vincent
pvincent@pacbell.net