I got a F845AB on the way.
OPR switch stem is broken. So I looked into the manual. Alas, that part isn't listed. Unless missing something, I just see replacement numbers for the power switch (S201) and power, range, zero and level knobs. But not a word about OPR switch/knob. All I can find is a reference (MP6) to a related lexan bushing, 0,435 ID, on the corrected 5-2 figure
Before try and drill/tap that stem, I thought I could ask about it here. Do you know what could be used as a replacement?
Edit: found it on amplifier P/C assembly, figure 5-4. Manufacturer code 89536, part number 5105-194936. So it's from Fluke, let's see if it could be found somewhere
Edit2:
https://boydindustrialsupply.com/products/new-in-bag-fluke-switch-5105-194936 €72 + 80 shipping... via DHL pirates. As if it isn't expensive enough. NO WAY! Fortunately it looks as if drilling/tapping could be feasible.
You might be able to strip down the knob/shaft and 3d print a new one, all it does is cam over the contacts so has very little actual stress on it.
I found your videos about F845AB quite interesting.
It's perhaps a lesser bad that the broken switch is a quite simple one; after looking at the picture, one could think at least a couple way to fix it. Thanks for your suggestion, I'll look at it.