I’ve been tinkering a bit and am attempting to build a clip-on adapter for my Quadra 650 motherboard to overclock it to up to 40 MHz. I had tried this once before using homemade contact springs, but it didn't work due to contact issues with the SG-615 oscillator. I really don't want to solder directly onto the motherboard. I am now using parts cut from an ISA slot, which offers exactly the right pin pitch. All the individual pieces were cut from the slot—specifically using a Dremel or Proxxon tool fitted with a thin diamond cutting disc. So far, it looks promising. My plan is to solder a standard DIL-14 oscillator onto a small piece of perfboard mounted on top of the clip. If this works well, I might design a proper PCB to accommodate various 5-volt oscillator form factors. When the clip is seated over the SG-615 oscillator, all four contact points make a perfect connection. I simply need to connect GND, VCC, and the CLOCK output; additionally—specifically for the connection to the motherboard's SG-615 oscillator—I need to tie Pin 1 to GND to disable the onboard oscillator.
I'm curious to see if it all actually works out...
I'm curious to see if it all actually works out...
