N’abend, a well-known problem. I renewed the Dimm switch (the resistance spring was broken), but it wasn’t. I pulled the light bulbs out of the tachometer today, but surprisingly they all look good. Tested as a standlight and each works. Since it is GE 194, these seem to have 4W. Now you could certainly turn in here used 5W and it would be a bit brighter, if necessary, but this is not an adequate solution of the P roblems. I think the idea is what the cause is. At the back of the tacho I could see a foil – does the mglw. have an influence on the brightness? What is the purpose of this, except to provide the contact surfaces? Edit: I have read that sometimes the mass connection of the cluster is also to be blamed, since it probably only takes place via the screws. Best regards.