i never tigthen them down real tight. I figured most o the ware happens because of the proper torque? just until you feel a bit of resistance. you can turn it a few times then you feel a bit of friction.
the whole thing with RF connectors is really annoying because you can't really lubricate them, but your supposed to lubricate freaking metal. If their steel your coefficent of friction drops from 0.8 to 0.2. 4 times. And the oil acts like a dust trap, so unless their always covered you get a problem.
Oh yea, think that gold plating is great? Gold has coefficent of friction of 2.5 on gold.
Do they have soft plastic ones that actually screw on? rather then trying to yank off a bolt cap? Sometimes those stupid condoms require pliers to remove (particularly on BNC). plastic/aluminum might be worse too because if anything abrasive gets in it, its gonna embed and turn into a grinding stone, that can't be cleaned (like you make laps by putting diamond dust into aluminum by pressing it in with a few pounds of force). How the heck are you gonna remove an embedded particle in a plastic thread?
Sliding those condoms on can maybe do the same thing, you can defiantly scratch things by dragging a dirty rag on them.
In any case, I proclaim RF chassis connectors are all broken and they should have a secondary thread or lug to attach a cap to.
Did anyone here ever do VNA experiments with various connectors with lubricant (PTFE or silicone preferred) on them? It's SO tempting. You would just need to throughly clean every time, and mechanically it would be better, but Microwave wise...
I also suspect if its lubricated, and there is a grindy particle in there, it won't get stuck so easily even after doing its damage on softer connectors.
I'm thinking about it too and it might be the case that a light grease film improves thermal conductivity because you won't have insulating air voids around the asparities that are making contact. It might make it more stable since you won't have them becoming as ductile due to spot heating potentially, this will change the mating resistance, so you wanna keep it the same rather then make it a bees dick better because it effects the calibration.