From: sdeyoreo@hotmail.com   
      
   On Saturday, May 11, 2019 at 6:13:50 AM UTC-4, Andy wrote:   
   > Some of the wire i strip and solder is a dark silver color. Its a pain to   
   solder to copper.. Is it aluminum? I read that a Al forms a non conductive   
   oxide on exposure to air.   
      
   I've had wire that sat for a few years, the ends can oxidize a little ways   
   into the insulation, so when you strip it, you get oxidized wire and it sucks   
   to solder.   
   Not sure if that's what you have.   
      
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