On 2020-Jul-09, at 9:39 PM, Ian Finder via cctalk wrote: > I know what you guys are thinking- no, this isn't for a keyboard collection > or some modern build or some other nonsense like that. > > I have a friend who is restoring a fairly interesting and historically > significant vintage computer- > The correct SD-series replacement switch would be the 4B3A- > > *** These can allegedly be found on some of the Diablo printing > terminals.*** > > Subject to what /appears/ to be a batch-related encapsulation failure in > the glue on the proprietary hall effect sensors, around a little over half > of the switches on the current keyboard are bad. > > It is possible other switches ending in ***A could be made to work with a > bit of labor and disassembly (swapping the fairly brittle sensors). > > I am not a keyboard expert but I have learned that you can remove a key on > some of these microswitch keyboards and read the model fairly easily on > each switch. > > Please let me know if you have a lead on a donor for these switches. They > will be put to good use, and you can reply to me off-list for more details.
Are these the key-switch model which snap into a thin-gauge springy stainless-steel U-channel to form the rows of the keyboard?
