ohg...@gmail.com  wrote:   
   > On Wednesday, September 13, 2023 at 6:47:33 PM UTC-4, Wu Ming wrote:   
   >> jad...@vwtype3.org  wrote:   
   >>> On Tuesday, September 12, 2023 at 7:03:10 AM UTC-5, Wu Ming wrote:   
   >>>   
   >>>> On multiple accounts a simple turning of the selector forth and back   
   >>>> repeatedly for few minutes should fix the issue. It did few years back but   
   >>>> the trick doesn’t work anymore.   
   >>>   
   >>>> Anyone with direct experience of it? Thanks for sharing.   
   >>>   
   >>> If you look at the tuning capacitor in any older radio, you'll see that   
   >>> it consists of a bunch of interleaved plates, half of which are mounted   
   >>> on a shaft that rotates to let them mesh more or less. The more they are   
   >>> intermeshed, the higher the capacitance and the lower the tuned   
   >>> frequency. Taking a more careful look, you'll notice that the stationary   
   >>> plates are insulated from the frame of the capacitor while the rotatable   
   >>> plates are mounted directly on the shaft which is in contact with that   
   >>> frame. The electrical connection between the shaft and the frame is thru   
   >>> a ball bearing on one end and usually a brass spring on the other end.   
   >>> Both ends were lubricated at the factory, but, with time, that   
   >>> lubrication dries out and oxidation occurs. Metal oxides tend to be   
   >>> insulators. Once the contact between the shaft and the frame, where the   
   >>> radio makes its connection, becomes unreliable or intermittent, you'll   
   >>> stop getting reception or there will be a lot of noise as the shaft is   
   turned.   
   >>>   
   >>> Moving the shaft back and forth can break thru those insulating films.   
   >>> You can try Deoxit to remove the oxides and follow up with Shield to   
   >>> provide some longer term conductivity. I like to also add a bit of high   
   >>> quality corrosion preventive grease at the same time, for the longest term   
   benefit.   
   >>>   
   >> Thank you for the details. Interesting. Will try.   
   >   
   > If it's one of those open frame tuners, have at it. If it's one of those   
   > clear plastic super compact square tuners with plastic film separating   
   > the plates, then any cleaner you use that carries a lube that doesn't   
   > evaporate will detune the tuner.  It will work, but it will cause your   
   > dial to be off, sometimes quite a bit.  Over time, the error will slowly   
   > decrease but never go away.  If the radio has an osc trimmer, you might   
   > be able to fudge a lot of the error away.   
   >   
   >   
      
   To be honest I have no idea. Maybe the video I linked in my original   
   question will tell you. Won’t have access to the device until next time I   
   visit my parents and this may take a while unfortunate.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)