The bandpass knob on mine feels “funny”.  The control seems to work fine in shifting the bandpass center up and down a several kilohertz each side of center. It turns freely up to a point but then something catches and it has much more resistance, like it has started to push a heavier assembly.  If I turn it the other direction the same thing happens after turning freely at first.

 

Is this normal?

 

Jim K4AXF

 

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