| Michael Terrell <terrell.michael.a@gmail.com>: May 12 08:08PM -0700 > From my perspective, the expanded metal gets weak over time and the tips dont maintain contact very well. One can always bend the metal back out and this lasts for some time, the metal has weakened and the probe tip doesn't stay on very long. One can repeat the cycle but each iteration results in a decrease in time the probe tip is securely attached to the lead. > I wanted the screw-on tips. (I think Simpson promoted this style). > J I always liked the H.H. Smith probes that held a steel 78RPM needle in a tiny collet. When the point got dull, it was just a few cents for a new needle. The sharp tip would penetrate the surface of the solder joint, and make good contact even if the surface was oxidized. The early ones were machined fiber tubing. Later ones were injection molded. I found some with a sharp, gold plated tip on Ebay, but the tip isn't replaceable. They aren't too bad, and they are handy on fine pitch ICs. |
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