Hi, I bought an RB153 last month and currently running a HotSpot with 2 radios and everything seems fine. I am wanting to add another radio but read earlier threats and saw that people did have problem with 3 radios in this card. MT mentioned about a hardware fix. Is it available already? and if it is ok to use 3 radios in a the new batches of RB153 (I hope that my is from a new batch 
you need to have 48v power .
this forum is not for wireless networking,try posting yor question there.