From: cd999666@notformail.com   
      
   On 15 Sep 2024 21:03:04 GMT, Roger Hayter wrote:   
      
   > On 15 Sep 2024 at 21:44:07 BST, "Liz Tuddenham"  wrote:   
   >   
   >> Nick Hayward  wrote:   
   >>   
   >>> Hi all,   
   >>>   
   >>> I have a switch which isn't making electrical contact. It consists of   
   >>> two leaf springs. Dead simple. They're springy enough to push against   
   >>> each other alright. And I've cleaned them with ethanol (didn't work)   
   >>> isopropyl alcohol (didn't work) and Servisol switch cleaning lubricant   
   >>> (didn't work either). I am at a complete loss here. Has anyone come   
   >>> across something like this? I can confidently say I never have!   
   >>   
   >> I have had this happen when Hypoy gear oil has got on the contacts, but   
   >> as other have said, the fault may be elsewhere.  Were you making your   
   >> measurements directly on the springs or on something attached to them?   
   >   
   > A possibly short term solution is to rub very fine folded over emery   
   > paper between the contacts. It tends to destroy plated contacts but   
   > might just get the switch working.   
      
   Which is what I plan to do next, in fact. I have some 3000 grit paper   
   which should be close to perfect for this kind of thing. In fact I have a   
   full range from 3000 right through to 40. I'm hoping it won't require   
   anything below 1200, though!   
      
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