Here are the two files you may need: https://files.catbox.moe/2c4c9b.zip
The main file is "cal-ahb-c000000.wifi.bin".
You have to replace the existing file in the following directory:
"/lib/firmware/ath11k/IPQ8074/hw2.0"
If you want 160MHz support on 5G you have to also replace "board-2.bin", but the 3rd radio won't work.
Under Windows I recommend using WinSCP since it provides a Norton Commander-like GUI for easy drag and drop between computer and router.
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