On Thu, 19 Jan 2023, David Gesswein wrote:
Originally discussing RK05 head position sensor bulb. I have replaced it. The offical part to replace it isn't available. You can open it up and put in a new bulb. I wasn't able to quickly find what bulb I used a number of years ago but if someone really needs to know I can dig further. One of the small ones with wires. It doesn't use bulb with base. LED didn't work. I think sensor is IR.
I have also replaced it many years ago. I bought a hand full of 5V micro miniature light bulbs with wires. I think I bought them at Bürklin back then. Anyways, they were a 1:1 match and the replacement works like a charm. I guess that the filament orientation in the buld is important and that it should be parallel to the graticule.
Christian
