From: xenolith@optusnet.com.au   
      
   On 9/5/2023 11:34 pm, 😎 Mighty Wannabe ✅ wrote:   
   > On 5/8/2023 11:58 PM, Ivan Vegvary wrote:   
   >> 1948 Pontiac, 12V battery, one wire alternator (was working when   
   >> parked 12 years ago).   
   >> No amperage reading even at 2000 rpm.  Battery voltage 12.6V.  Battery   
   >> voltage with car running 13.8V, however amp meter only reads 0 or   
   >> negative with headlights on.  Placed an after market ammeter between   
   >> the alternator and the battery.  Same reading as ammeter in the dash.   
   >> How could this be?  Alternator supplies voltage but no current.   
   >> After idle for 12 years maybe residual magnetism is gone.  Needs to be   
   >> excited.  Can't find a YouTube that shows me which terminals to zap.   
   >> All help is appreciated.  I can certainly buy a new unit, but possibly   
   >> have other problems.   
   >>   
   >> Thank you   
   >   
   > If you get 13.8V when the car is running, that means the alternator is   
   > providing output.   
   >   
   > The alternator output is AC. You need to use AC ammeter to measure the   
   > AC current output from the alternator.   
   >   
   Correction, the alternator output is DC. The 6 internal power diodes   
   provide the necessary rectification. The 3 exciter diodes are meant to   
   excite the field coils and set the generation process into gear.   
      
   --   
   Xeno   
      
      
   Nothing astonishes Noddy so much as common sense and plain dealing.   
          (with apologies to Ralph Waldo Emerson)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)