I have the same problem with version 18.104.22.168.
Thanks for your help.
I test with ac-8260 and i have a better transmit power (-56dbm).
Could you help me please ?
The values you are referring to may depend on the specifications of your computer, therefore, we advise to contact the computer manufacturer about this inquiry. They will be able to inform if these adapters are fully compatible with your PC, and which would be the expect performance when they are used. Furthermore, we do not recommend/support custom integration of Intel® Wireless Adapters due to regulatory compliance:
You can find the public specifications in the Product Briefs for our different wireless adapters (the transmit power is not listed):