11m operation

It is many years since I did any CB operation. I think the last time was testing a couple of single channel hand portables. I guess that was in the 1990s. 

I see on this week's Amateur Radio Weekly that there is a field day for "freeband" enthusiasts at 11m. The legality of this is not known although there is an ISM band around here. 

How much power can legally be used will depend on where you are. In the UK, it looks like the limit is 100mW ERP according to IR2030.

11m amateur band

Until today, I had no knowledge that the 11m band was allocated to the amateur service in the USA prior to this being allocated to CB. I guess the nearest amateur bands today are 12m and 10m. 

This appeared on the Amateur Radio Weekly email, with the original article being on Bas's blog at https://pe4bas.blogspot.com/ .  

I was aware of the 5m band, but wonder what other allocations were made in the past? Possibly there were other odd allocations made locally such as the 73 kHz band in the UK at one time. In the UK a very few NoV permits were allocated near 9 kHz. I had one of them.

Some other countries had an 11m amateur band.