My guess is that base metal is copper, seeing as they are mounted to a piece of 1/4" copper, and the only reason to use metal that thick is heat. They are out of a microwave based radio amplifier.
Best method to me, given their size, seems that it would just be digest in nitric, and continue along.
Images will come from phone.
Best method to me, given their size, seems that it would just be digest in nitric, and continue along.
Images will come from phone.