||Cooling the beast
In order to cool the Apollo equipped Amiga 600, we suggest a two fold strategy: a) cool the chips on the Apollo directly; and b) make sure you get a defined air flow in the system, flowing over (and under) the Apollo and removing hot air from the case.
I managed to find very small 2.5 x 2.5 cm heatsink plus fan combinations that are no higher than 8 mm. These were expensive and could only purchased through a dealer specialising for notebook equipment
(they were manufactured by EKL)
but fit the Apollo very well. 3.5 x 3.5 cm would be ideal for the 68030 CPU,
2.5 x 2.5 cm for 68882 FPU if you use one. Always cool both!
The pinout from left to right as shown in this picture is:
5V GND GND 12V
Once you've had the A600 running stable with all the cooling suggested for an hour or so, switch it off, make sure to statically unload yourself and touch the 68030 processor and the FPU. Do they still get hot? Then you'll need more cooling. If they are warm but can be touched without burning your fingers, you should be on the safe side.
This shows the upgraded Amiga 600 with all its fans and heatsinks in place:
and this is a closeup of the Apollo with its fans and heatsinks. As always: Click on the picture for a large version. Note the empty FPU socket. My FPU died while operating the Apollo uncooled for too long!
This shows the finished Amiga 600 from another angle. This also shows how we've closed the radiator on top of the Amiga 600 with duct tape to get a defined air flow generated by the fan. The fan was carefully screwed between the ribs of the radiator and the screws then insulated with duct tape.