We use to use a 50 pair 66 block. Here is a picture of the layout. If we had time and it might be needed we would use most of the block. We used mostly those small diodes that I showed on the bottom of the picture. You had to be careful when punching down the ends of the diode that you didn't squash the diode under the punch tool. Try not to make them too tight to the pin.
Where I worked we never used the ringers in the set for common audible. Ours was always 10v buzzers. All our AE sets came without a ringer.



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Last edited by Bob3470; 10/31/18 06:43 PM. Reason: Added a couple of lines.