Repeater Off-Sets are different with HAM.

[TNFrank]

I've also noticed kind of a pattern for CTCSS tones for each band. Not every repeater follows the pattern but I'd say a good 80-90% of them do. Has anyone else noticed this?

[SteveShannon]

3 minutes ago, TNFrank said:

I've also noticed kind of a pattern for CTCSS tones for each band. Not every repeater follows the pattern but I'd say a good 80-90% of them do. Has anyone else noticed this?

No, I haven’t noticed. 

[WRXB215]

Your title says "offsets" but then, in the body of your message, you talk about CTCSS. Which one is it and what pattern do you think you are seeing?

[dosw]

2 hours ago, TNFrank said:

I've also noticed kind of a pattern for CTCSS tones for each band. Not every repeater follows the pattern but I'd say a good 80-90% of them do. Has anyone else noticed this?

While the choice of CTCSS tones is not entirely random, it may as well be. There are common conventions, like avoiding adjacent tones in a given overlapping area, avoiding tones that are harmonics of power lines, that sort of thing. I think in some cases it's more about "legacy conventional wisdom" than about "real world issues in 2025." But as far as repeaters following a pattern, what you might be seeing is either a freak coincidence, or regional conventions that may have some historical rationale. Not any broadly adopted pattern.

[tweiss3]

1 hour ago, dosw said:

While the choice of CTCSS tones is not entirely random, it may as well be. There are common conventions, like avoiding adjacent tones in a given overlapping area, avoiding tones that are harmonics of power lines, that sort of thing. I think in some cases it's more about "legacy conventional wisdom" than about "real world issues in 2025." But as far as repeaters following a pattern, what you might be seeing is either a freak coincidence, or regional conventions that may have some historical rationale. Not any broadly adopted pattern.

Actually, your local repeater coordination body (typically won't answer anything and are useless), have recommended tones (2-5 of them) for each region of the area which they coordinate. These are Ohio's recommendations, not requirements, but it keeps adjacent pairs from using the same tones.