I've done a tonne of google searches and so far have turned up flat in results, I've also read through this thread here but it didn't help much.
I recently acquired a pretty old tv (pictured below) to fuel my desire for retro gaming authenticity, I have no idea how old it is probably mid 70s to 80s, just that it requires a lot of tuning and only has one cable port. (for rf)

I've been trying for about the past week to try and get my SNES working on it but no luck so far. I know that it works because I've hooked it up to our newer tv using rca cables with no issues at all.
However because this tv uses an rf cable I'm having some difficulty. I'm using the official rf adapter that came with my SNES (as well as a brand new extra) but it doesn't seem to have a channel or PAL setting switch on it. I've tried connecting it directly into the tv and also into the vcr I have and both produce the same result, excellent sound, no picture. (Except with the vcr there's static instead of a blank screen)
I've tried tuning the vcr into the right channel however I still can't seem to get picture, only sound and static.
Sorry for the wall of text, I'm just trying to give as much detail as possible.
Any help is greatly appreciated!