Topband: Verifying integrity of 75 ohm coax.

[Bill Wichers]

As long as the grease isn't too thick it is fine even on low-pressure contacts. I've seen it used in RJ45 connectors for wireless LAN devices that are used outdoors to help prevent corrosion of the data contacts. On a relatively beefy connector like F, PL259, N, etc., the normal wiping action of the contacts during mating will ensure good electrical contact regardless of the presence of the grease.

  -Bill

> High pressure contacts, I feel fine getting slathering dielectric grease all over
> them before making the connection. Examples are like a Battery terminal in a
> car, or a spade lug under a screw, or the barrel on an F connector. Something
> you actually apply some amount of force to tighten (even just "tight finger
> force"). This forces the grease out of the actual metal to metal contact, and
> at the same time ensures the metal contacts are enclosed in the grease.
> 
> But for low pressure contacts, e.g. molex pins, or the center pin on an F
> connector jack, I think it's best to keep the dielectric grease off the low
> pressure contacts. Having it in and around a connector boot or shroud that
> goes around a low pressure contact is fine. A good thing in harsh weather or
> chemical environment to help keep weather and fumes out. Rubber
> connector boots last a lot longer with silicone grease on them.