Reply To: Droppers from point blades to TOU

[Bob AllisonParticipant]

I have never really liked the twin dropper system: two holes instead of one and difficult to keep the switch blades a constant distance apart.

My preferred solution is based on Mike Norris’ on his Preston layout: a stretcher bar made out of thin pcb, bent wire passed through holes in the stretcher bar (about 16mm centres) with one end soldered to bar and the other end to the switch blade.  Drive mechanism from below to taste – Mike uses a scale crank bar but a single wire from a TOU would work just as well.

Hopefully the sketch will clarify.

Attachments:

1. 

   Preston-stretcher-bars001.pdf