So....I was talking to my buddy who recommended I upgrade one of my coax antenna feeds because it is really cheap cable, and old, and he mentioned the possibility of it shorting out. I think the probability of this happening while transmitting at 100w on 10m is probably low, but cable does degrade/age in the weather. Its probably good advice to upgrade the cable, but it got me thinking/wondering.... Is there any kind of device out there, than can provide an RF "circuit breaker like" fail safe, perhaps where it routes RF output to a dummy load? Something that if your antenna feed suddenly fails due to a short from age/weather/water, it can fail safely? Does such a gadget exist? If it does, what is it called? It almost seems like something like this SHOULD exist, but I don't know if it's even possible. Any thoughts? Thanks.