as has already been pointed out in an earlier thread, the original selector switch is a multi layer wafer design, custom built for the PAS back in the day. Replacing it with a modern single wafer will not work if you stick with the original Dynaco preamps. You could perhaps use a modern multi wafer selector switch, but it would require some 'working out' as to which contact/s in each wafer of the switch to use. I have never done this because it is just too time consuming and not an easy task!
We also sell that type of selector switch, but it is only suitable when combined with our various modern preamp replacement kit.
You have two choices. Re install the original selector switch using the original Dynaco wiring diagram, or consider upgrading to modern PAS replacement pcb's and which point you would need to use that modern selector switch.
