[time-nuts] FE-5680A heat sink

[Murray Greenman]

I think we've all learned from this. Good info about the Efratom unit,
and sounds as though we should aim for around 38C with the FEI units as
well. The FE-5680 looks to be easier to deal with than the FE-5650, so
I'll look into that first.

Murray ZL1BPU