I've sort of done that, using my US TopLoader RF with my PC Engine. I can't remember off hand which channel it went to, but I believe it was 95.
I notice the static on channel 3 gets a little bit brighter whenever I turn the power on. I remember seeing some color at one point too, but twisting it around only seems to have marginal efforts. The RF cable may have just finally kicked the bucket. I noticed the pin on it was a little bent out of shape.