Please tell me that when you said 'acid' you really meant 'acid free flux for electronic wiring '.

What kind of wire won't take solder well?

Charlie


No, I actually meant a weak muriatic acid solution.  Chromel-alumel K-type,
and Iron-constantan J type.  I was using a acid free flux core solder which
would not do the job.  I rinsed with distilled water after soldering to
remove any residual.  I think it was the K type that were the worst.

I had considered a crimped joint transitioning to tinned copper before the
solder joint; but then I'd have TWO dissimilar metal junctions and further
error.   Seemed best to solder directly to the pins as best I could.  .
What have others done with EGT thermocouples to the EM2?

When I re-do it when it doesn't work anymore, I'll get the gold plated d-sub
pins and a new connector.

Al