On Fri, Oct 23, 2015 at 11:17 AM, Noel Chiappa <[email protected]> wrote: > > Alas, it's DPDT, not SPST. > > Ooops; the ones in the PDP-11 front panels (/05, /45, /70 and almost > certainly the /40 too) are SPDT, not SPST
Yes. The footprint for the existing front panel PCBs are SPDT. > I looked at the data sheet for the ones you found, and it's actually a sheet > for the whole series, from which it looks virtually certain that the right > ones (both pemanent and momentary contact) can be ordered from C+K. It's just > a matter of working out what the part number would be! Part number and availability. From a quick look around, I see low availability numbers (one part was "3 remaining" and a notice that they would not be restocking that part). In the larger scheme, I think it's fine to find these switches for restoring real machines, but I think we are better off finding alternate sources for a new design. The benefit of the "real" panel mount switches is that if we make a replica PCB with PCB-mount, the panel mount switches will still work, given the DEC mounting frame (and that's another kettle of fish - I have one, and I think it's stainless steel because it's quite "lacy" with 12mm square holes and 1mm of metal between them. That would be exciting to reproduce in a home shop). -ethan
