On my Naim Nac 72 the source selector knob keeps working loose although I take it apart and tighten the screw inside it.
Is there something else I need to do ?
Is there a way to fix this so it doesn’t keep working lose ?
You tighten the screw while it is on the shaft of the selector switch...
If it's still coming loose...then the knob has probably cracked inside
You need to check this hasn't happened...and if it has..and it's not too bad..then you can reinforce the knob by filling it with hot glue or epoxy resin
Also, be aware that the rubber surrounds can stretch and lose grip on the knob. A ring of tape around the wider part of the knob will increase its diameter enough to restore grip.
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