On Tue, Feb 21, 2012 at 06:52:57PM -0500, Charles P. Steinmetz wrote: > I wrote: > >>Speaking from extensive experience, if you need 2 now, plan on needing > >>somewhere between 5 and 31 more over the next year or two. > > Stewart replied: > > >That is my experience. > >I never managed to find any exact replacements here in England > >so I ended up replacing the mechanism with some SMT switches > >and using a probe to press them. > > And unfortunately, the parts units you find for sale invariably have > bad switches. I have more than once tried to use switches from a > donor unit to repair a 1992, and they have all promptly failed > during post-op testing. In one case, six successive switches failed
More or less I solved that way: I replaced the innards of the switches with the innards of common 6x6mm tactile PCB switches. They are very different, based on a metal flat spring instead of a soft conductive plastic, but I found that they work anyway (but with some bounces sometimes...). I had to mask with thin tape some part of the electrodes. It's a time consuming work but you never have to do it again... Best regards, Andrea Baldoni --- Ermione s.r.l. Via Provanone, 9008/D 40014 Crevalcore (BO) - ITALY PI/VAT IT02745891206 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
