These are the plans for an audible MONO calculator speaker that 
does not lock up your calculator.  The original plans were provided by
Eric Linenberg.  

To build a MONO calculator speaker, you will need the following parts:

1. Radio Shack miniature PC BOARD MOUNT PIEZO BUZZER (catalog number
273-074)
2. TI calc-to-calc link
3. Electrical tape

Directions:

1. Cut your link near the one of the ends, and take the longer part.  
2. Strip off about one inch of the black rubber.  There should be an
   uncovered wire, a red wire, and a white wire.  Strip about half an
   inch off of the red and white wires.
3. On the bottom of the buzzer (see picture below) there are two wires.
   One is longer than the other.  Wrap the white wire around the
   longer wire, and wrap the red wire around the shorter one.
4. Take a square piece of electrical tape and put it on top of the the 
   two wires so that they are secure.  
5. Next, take the uncovered wire and put it in the hole on top
   (don't put it in too far in or you will get an annoying high
   pitched buzz).
6. Tape everything up so that the wires on bottom are not in danger
   of you.  Be sure not to put tape over the hole you put the
   uncovered wire in, or the sound will be muffled.  By the time you
   get done, it should look something like an earphone.
7. Plug the link into your calculator, and buzzer should fit nicely
   into your ear.  This way, you get the sound quality of headphones
   or earphones at a cost of around $3.00 (the buzzer cost me $3.00
   where I live).  All you got to do now is start up your game and
   enjoy!

Picture of buzzer:
      
    _________
   |   _|_   |
   |____|____|
      |   |
          |

All editing of the original version of this text was done by Jeff
Rustrum.  An original copy of this document can be obtained by e-mailing
Eric Linenberg at ELinenberg@gnn.com.  If you have any questions or
comments, please send them to seahawk@cdsnet.net.
+----------------------------------------------------------------------+