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  1. S

    Building a simple Alternator whine / ignition filter

    just an update, I tried making one of these as noted on a link, used the 12 ga wire etc, mine measured .046 milli henrys , also tried 2 of my small coils & made a "T" filter total of about .5 mh total, neither unit helped much with the whine but I found that when I flexed the plug on the radio...
  2. S

    Building a simple Alternator whine / ignition filter

    "I just built one and out of curiosity decided to measure the inductance. I got 135mH but I'm sure that could vary a bit. I hope it takes care of my noise problem." hey ghilliesnpr are you sure thats not micro henrys or nano henrys that you measured? I had some round enclosed cores (...