EGT in my plane runse around 1200 degrees when leaned out properly.

When I was in college I worked in an electronic component burn in lab. We used thermocouples all over the place, mostly in ovens where components were tested under heat. Buying thermocouples was an expensive proposition. We made our own by simply tinning the iron and constantine wires separately and then twisted them together. It worked great.

That said, the highest temps we usually saw were 250 degrees Centigrade, so that might not work at EGT temperatures. In fact, I fully expect that solder melts below EGT temps. BTW, the reason for tinning the wires was to slow down the oxidation of the individual conductors.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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