Summary

The chips on the old-timer C64s and 128s run hot, Hot is a recipe for IC failure. With the original MOS chips getting more and more rare/expensive especially the SID, PLA, 6510 CPU, Roms..).I thought id look at how to keep things cool. #1 seems to be heatsinking the chips. But to go extra-cool lets also get some airflow going in that enclosure!

This design uses a fan that draws air through the enclosure and out of the the top vents.

The fan is a 50mm ultra-quiet one from overclockers. I powered it directly from the 12v LDO. A bit of soldering required but the pads are quite big and the chip is tolerant to some heat. Seemed like a safe bet. I added a bit of hot glue to the leads as not to put too much load on the joins when fitting etc.

I attached the cooler t the casing using carpet tape as shown in the pics and a little dab of hot clue at the edges.

The cable uses a connector from an RC battery connector (cant remember exactly which none .Most will work fine. Connector i useful if you want to ope up the case and remove the keyboard to do some work.

Seems to work OK and just keeps the air circulating without being too noisy. Enjoy. Post your makes. P