Hi Dave - 
Just wondering why 10mm back from the contact point of the thermocouple?

I prefer to use high-temp solder.  However, whether you are using high-temp
solder or conductive epoxy, the key to reliability is to remove as much of
the old (low-temp, 63/37) solder that was already at the interconnect using
solder wick or similar.  Then attach the TC with either a small amount of
conductive epoxy or flux and wire solder (ie: 10/90).  Use a small amount of
either and be sure that the welded end of the TC is in contact with the
interconnect you are measuring.

I will discuss this subject in the "On The Forefront"column in the April
Circuits Assembly magazine.  

Phil Zarrow
ITM, Inc.
Durham, NH

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