From: cd@notformail.com   
      
   On Sun, 12 Oct 2025 18:38:50 -0000 (UTC), Jerry Peters   
    wrote:   
      
   >Cursitor Doom  wrote:   
   >> Hi all,   
   >>   
   >> I've got this old Grundig radio made in 1972 and the main tuning cap   
   >> gets scratchy from time to time owing to a design defect where they've   
   >> put the moving contact at 90 degrees to the shaft so it runs in a   
   >> narrow slot, rather than the more common leaf spring contact. Over   
   >> time, this has worn and as it has, it doesn't self-correct for tension   
   >> like the leaf type does. So I've been using a switch cleaning   
   >> lubricant on it, which works great for about 6 weeks, but then it's   
   >> getting scratchy again. Is there something more permanent I can use to   
   >> maintain good contact? I'm thinking maybe copper grease like the stuff   
   >> they use on brake pads to stop squealing. Would that work? Switch   
   >> lubricant fluid is just not sludgy enough to stick around!   
   >>   
   >> CD.   
   >   
   >Powdered graphite used for locks perhaps?   
      
   Powder? Not so much. But they do make a graphite grease and I plan to   
   try that if the other ideas fail.   
      
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