I was using my Hi-Tek Series 725 for a few years until some of the keys became difficult to register, and all the keys seemed to require different amounts of torque to register the keystroke. So, I decided to dig it out of the drawer and disassemble it. What a unique, weird-looking piece of equipment this is. After cleaning it I'm thinking of lubing the linear shafts
For those who aren't familiar with the "space invader" switch: The small contact prongs are quite fragile and can be easily bent, and the tip of one of the two prongs in each switch is divided into three tiny fingers.
I found one that had previously been bent. It takes quite a bit of torque to pull the space invaders off of the board. I had to brace the board with my fingers so the tiny springs under the switches wouldn't go flying as the switch was pulled off (which they did anyway). But my fingers had to be strategically placed so I didn't touch any of the surrounding contacts—challenging.
The large Enter key has two wiry stabilizers under its hood, something I wasn't expecting.
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