Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Mddeming-at-aol-dot-com> Hi All, My grandson recently acquired, sight unseen, what was claimed to be a bag of 100, 1000 V 1A high speed diodes. The bag says US1M-13. They look like a bunch of tiny black beans with no leads. What are they? Are they any good for TC work? How does one connect them? Any help appreciated. Matt D.