[hpsdr] thermocouples

[Lawrence Stoskopf]

I never was sure how the professionals treat the measuring end of the 
thermocouple.  I just twist and hit with a hammer.  Not sure how reliable 
that is. 

As for the measuring instrument end:  the ones I've seen have connectors of 
the same material, but somewhere there has to be a connection to copper. 

Comments, 

N0UU 


> Thermocouples should never be soldered to (or even mechanically connected to)
> copper wires.  That creates more thermocouple junctions that produce
> unpredictable changes to the thermocouple's calibration factor.  The
> thermocouple leads should be long enough to connect directly to the terminals of
> the measurement instrument. 
> 
> Phil, K3IB