XPost: sci.electronics.repair   
   From: nobody@but.us.chickens   
      
   On 4/21/2010 12:18 PM David Nebenzahl spake thus:   
      
   > Question is about a Kyocera R-851 receiver, ca. 1985, 85 w./channel.   
   > Unit is in fine condition (many capacitators have been replaced) except   
   > for one thing: it doesn't remember radio stations.   
   >   
   > This receiver has 7 "presets" each for AM and FM. These can be set, and   
   > the unit will remember them so long as the power is on. Leave it   
   > overnight and the settings are gone.   
   >   
   > I'm ASSuming that these are stored in memory that may have battery   
   > backing. Opening the unit reveals no such battery/cell.   
      
   But of course, as readers of this thread know, further investigation did   
   in fact reveal a battery (3-volt Li cell).   
      
   Clipped off the old cell (it was attached to the board with little   
   spot-welded-on "legs"). Found a very similar cell in my battery   
   collection (flat 3-volt Li large "hearing-aid" style cell). Soldered a   
   couple wires to it, soldered it to old battery connections, wrapped it   
   with electrical tape and tucked it into a slot behind the front panel.   
   The receiver now remembers all presets.   
      
   By the way, wasn't there a thread here recently about the difficulties   
   of soldering connections to such batteries/cells? I had no problem at   
   all; I cleaned up spots using fine sandpaper (320-400 grit silicon   
   carbide), then used my old non-lead-free solder and a clean tip on my   
   iron. Connection was bright and solid.   
      
      
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   with the flaunting of well-defined muscle, wrapped in flags.   
      
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