Why would a repeater owner limit access to a repeater?.
Just because a repeater may use some form of coded access, such as CTCSS, this does not necessarily mean that it is a “closed” repeater with the intent of keeping certain users out. Many “open” repeaters employ coded access, either full-time or part-time, in order to eliminate, or reduce, various types of interference, not to restrict who is welcome to use the machine. Also, repeater upkeep is expensive and it is not unreasonable to ask users to help financially with repeater expenses including site rental fees, utility bills, phone line expenses, property insurance and equipment maintenance. There’s no rule which requires the repeater owner to let you use it. A repeater is not a public utility–you don’t have a “right” to use it! When you are using someone else’s repeater you are, in effect, a visitor in the owners station. So, you should conduct yourself accordingly. If you use that station in a manner which the owner finds objectionable, that person has every right to revoke your pr