Qodosen DX-286 Display ON vs Display OFF LW (and MW) with whip antenna as external

Qodosen DX-286 is very sensitive to electrical interference when operating on its whip in lower bands. It's LCD screen and even at the distance my phone. Especially when screen is touched. Also it picks up even mobile phones digital camera zoom movement.
Lowest filters like 3 kHz and 4 kHz gives the highest noise. And opposite, the stronger signal - less noticeable interference.
Luckily the screen can be switched off.
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