Not given up yet. (Finned aluminium pipe doesnt seem very easy to find, after trying a few of the local metal shops
)
I've come up with a much simpler design, which could be assembled quite easily. It would also be less fragile, and so more portable
I'm hoping that if the two sheets are spaced apart sufficiently, the airflow will cool *both* sides of each, yielding roughly 0.7m2 surface area.
Of course, I could stack two of these radiators, or just use one on each side of the PC....
The "grey stuff" is aluminium sheet, probably 0.5mm thick. It would have to be clamped somehow onto the pipes.
Come to think of it I could use copper sheet, (although cost may be an issue) and just solder it to the pipes.
It could also be painted black to increase radiation.