We saw major changes back in the 1970s or 80s as "digital" was coming in, I do not remember the exact year.Ah, for some reason I though Japan and Australia were on 10 khz spacing, like the USA is.
Europe, Asia, and Africa changed their channels to become exact multiples of nine.
Many channels had been 10KHz apart on the bottom of the band and 8KHz apart at the top.
Australia changed from 10KHz spacing to their current international 9KHz standard.
The Americas were toying with the idea to do this also, but ultimately rejected it.
This would have likely been a better plan than to add ten new channels at the top.
So, the few common frequencies today are:
540, 630, 720, 810, 900, 990, 1080, 1170, 1260, 1350, 1440, 1530, and *maybe* 1620.
These are the frequencies that the fictitious Republic of Antarctica would use.
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