Peter wrote:
If you don’t have that gasket you can buy the material in sheet form. How much difference that gasket makes IF the four screws make a good contact is a good Q (at VHF frequencies I doubt it makes much difference – @alioth may know)
I have to imagine so, you also get some capacitative coupling anyway at VHF and above. (It’d be interesting to hook up a spectrum analyser with a reflection bridge to see what difference it makes with and without the gasket, or perhaps a NanoVNA)
