see link
https://forum.openwrt.org/t/archer-c7-2-4-ghz-wireless-dies-in-24-48-hours/44163/223
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thanks. Developers are checking this.
This is the require fix
option ldpc '0'
You mean this one, right? Is it verified?
Correct, verified by me, the difference is like night and day.
it will work on ar300m, ar750 and possbily ar750s (I dont have this device)