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RFI Finger Print and the Solution

Ken W9IE
Ken W9IE Member ✭✭
edited August 2020 in Amateur Radio Interests
Attached is a Screen Dump of the RFI Signature and the Solution.
I have been searching (off and on) for over 2 years for the RFI.
The RFI was much broader than the Picture I am showing here.
It went from 14 Mhz to over 30 Mhz. An interesting part of the
signature is that each Spike had 2 small peaks and they would
switch back and forth at around 120 times per minute as best 
I could count.
I finally solved it by putting one of the 28 Mhz frequency's in my
HT and went walking around the neighborhood.imageimage
My neighbor was very helpful by switching off breakers.  It was
kinda elusive though....  It was under a bunch of stuff in the garage
and left plugged in.   The RFI was active regardless of it having a
battery in it or not.
I do not want to imply that all Hitachi battery chargers are bad.
This is just one that went dirty.

My Neighbor now has a Brand New Top of the Line Cordless Drill
and charger....   My Gift..

73's and I hope this might help someone find a similar problem

Ken  W9IE


  • Walt - KZ1F
    Walt - KZ1F Member ✭✭
    edited November 2016
    That's awesome Ken! Good job!
  • KY6LA_Howard
    KY6LA_Howard Member ✭✭✭
    edited January 2017
    Found the exact same issue with Ryobi Charger for their battery packs.
  • Allne
    Allne Member
    edited June 2018
    The fingerprint solutions can also get by some of the technique by which you can get that exact solution which you want can also get from the Hp Tech Support for more information and knowledge then try to contact with them.
  • Berry Smith
    Berry Smith Member
    edited October 2018
    UIDAI desires to enhance its device technology and specifications in collaboration with the Industry partners with a special emphasis on the integrated Brother Wireless Printer Setup devices to facilitate the large-scale adoption of authentication for consumer transactions.

  • Clay N9IO
    Clay N9IO Member ✭✭✭
    edited February 2020
    noushad the "Troll" Fair warning, don't click on the link.

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