Can anyone tell me what these are?

Discussion in 'Amp Tech Center' started by 7171551, Apr 15, 2018.

  1. 7171551

    7171551 Tele-Afflicted

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    Found 3 of these in the cabinet of an amp I just got in a trade... In this case google was not my friend- and I did try! I'm just curious :rolleyes:
    WP_20180415_22_30_42_Pro.jpg
    Here is a pic...
     
  2. notmyusualuserid

    notmyusualuserid Friend of Leo's

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    Are they magnets?

    'Ferrite' suggests that they are.
     
  3. jimbo735

    jimbo735 Tele-Afflicted

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    RFI EMI Noise suppressor.
     
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  4. 7171551

    7171551 Tele-Afflicted

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    Thank you kindly sir, for the quick answer...

    I'm now wondering why they were left in the cab of the amp?? :lol:
     
  5. denny

    denny Tele-Holic Gold Supporter

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    +1

    Looks like a snap-on noise filter used on power cords.
     
  6. ajm763

    ajm763 TDPRI Member

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    Here's some information on snap-on ferrite beads with application notes:

    http://palomar-engineers.com/ferrite-products/snap-on-split-beads/

    Note that multiple turns through the ferrite bead will increase the filtering. These are commonly used to reduce/eliminate radio frequency interference (RFI) coming out of (e.g. computers) or going into (e.g. audio amplifiers) devices. Often all paths into or out of the device (e.g. power cord and input cable) will need these to reduce the interference.
     
    Last edited: Apr 16, 2018
  7. cattzap

    cattzap Tele-Meister

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    The align the ions so you don't have to wear foil hats.
     
  8. jvin248

    jvin248 Poster Extraordinaire

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    Those gots da tonzez in 'em. Best use two!

    links above should have you sorted out. Previous owner probably had a single coil into the amp and thought that might fix the hum.

    .
     
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  9. schmee

    schmee Poster Extraordinaire

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    Ballast or noise suppressors, often used for HF Radio stuff.
     
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