No longer smooth connection on transition of battery switch

[englishrobs]

If I take this apart is it possible the contacts need cleaning. Occasionally if I turn this while underway the power to nav drops before being re-established. This isn’t a massive problem but it only started happening by towards the end of last year.

 

[Iliade]

Yes.

But they are the work of the devil...

 

[KompetentKrew]

Crikey! Venus are a lot more expensive than the no-name competition, aren't they?

I was able to replace mine with an identical one for £20 - it was identical and I reckon the last one had lasted 25 years.

 

[Bodach na mara]

I had a Cheapo brand versoon and after one season there was a graunching noise when I turned the knob. I dismantled it and found that the plastic moulding that holds the contacts had disintegrated. Buy Cheapo, buy twice.