I have tried now serveral devices and in a lot of different configs.
If I try it in default config, not security, my notebook is connected at a max speed of 130Mbps and the transfer speed is LOW, verry LOW
If I use an Engenius Accesspoint my notebook connect at 300Mbps and I have as speed of about 12 MB/s
What can I do to get this speed with mikrotik???
130Mbps looks like a 20mhz channel width. Enable 20/40mhz channel width and test again, you should be able to get the data-rates up to 300mbps.
This is with 20/40 Mhz HT below.
Have you enabled both chains?
/int wireless set 0 ht-rxchains=0,1 ht-txchains=0,1
Sure I have enabled both channels.
please post full wireless config
/interface wireless export