Set heading & radial

On the C172 and C152, sometimes the adjustment of the VOR is not possible precisely.
They move 10 to 10 degrees, impossible to be more precise.
The same goes for the heading indicator.
It appears on the runway ready to take off or in COLD & DARK.
But randomly.
Have you ever had this problem?

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A post was merged into an existing topic: Heading Increment Bug (10 degree instead of 1) Explained