Here's a link to a photo of the PET's version.
https://drive.google.com/file/d/1cO2...ew?usp=sharing
They're c. 9.30mm dia and 5.70mm high.
The actual contact is 4mm dia and c. 1mm high (not easy to measure).
Colin.
Quote:
Originally Posted by SiriusHardware
I did find some potential replacement contact dimples, but it depends whether the original ones can be removed and are the same size. (#1603).
To answer Owen's question, yes, the 74LS145 was replaced and did have the hoped for effect, but there is also a secondary problem where some of the carbon contacts on the plungers are dead as well. Colin has tested every key position by using a known good key plunger to activate each one.
|