Re: 'Solder Rot'
I am very surprised at Tektronix having this sort of problem. I worked a few years at a vintage sound equipment botique as a retirement job, and aged solder joints were a very common and serious problem. Kenwood gear, both sound and ham, was the worst for this problem, but it occurred elsewhere as well. Reheating all of the connections and adding a small dab of well fluxed solder was all that was needed in many cases to bring a dead or poorly performing rig back to life. For through hole solder joints, I like to warm them up, push a piece of small stranded wire through, flow the solder well, and then trim the wire. Over 40 years ago, I was given a couple dozen Monroe/ Litton desktop calculators with Nixie tube displays. They all had unreal faults, and all but one were fully restored by putting wires in the through hole connections and reheating the others.toggle quoted messageShow quoted text
Bruce Gentry, KA2IVY
On 1/6/20 8:10 AM, EricJ via Groups.Io wrote:
It absolutely does. I was just reading a paper about this the other day. Several factors contribute to circuit failure due to aging. One being that the solder bond weakens apparently due to inter-metallic layer growth over time. There was a whole section dedicated to testing shear strength of aged surface mount joints. Leaded solder did much better than lead-free at retaining bond strength in those cases.