The body of the thermocouple did not seem like stainless steel.. It felt like Aluminium to me, but I cannot be sure.
I was thinking of putting a light coating of silicon heatsink grease on it next time. I will look into your copaslip suggestion as well, that might be better than standard silcon heatsink compound.
Cheers,
Troy.
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snowygrouch 1
I cannot help you with this problem, but for anyone reading (and for when you re-assemble) I would
recommend the following.
1) The thermocouple body is probably stainless steel (or it certainly OUGHT to be), so will expand less
than the aluminium block. Try to remove the thermocouple when the assembly is hot.
2) When installing, (as well as a bit of aluminium foil if you have a rattley problem), I would put on
a tiny dab of Copper grease. This will smoke and generally smell a bit for the first while of use, but
is designed as a high temperature grease specifically with the property that it will prevent things
fusing together when locked together for long periods. When it gets hot the soap carrier agent will
slowly evaporate, leaving basically just copper powder in your joint. This will prevent anything from
becoming locked together over time, and also ought not to provide any problems with thermal conductivity.
However I expect that the presence of the grease carrier agent could initially slightly behave as a bit of a
thermal barrier, so until its evapourated your readings might be a fraction off.
The usual trade name for this would be COPASLIP
Anyway thats what Id do !
C.
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