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  • Removing resin from a 49:1 sealed transformer

    From bgonev@2:240/8001 to All on Wed Jun 18 21:01:14 2025
    Hi All,

    After I do not know how many years, I'm back here on the net :).
    So back to the primary topic:
    Recently I've purchased an 49:1 unun from a manufacturer, but I am not satisfied with the performance of it (compared with another 49:1 transformer the SWR is notably higher.
    Therefore I plan to dissassemble it completely, but the main problem is that the ferrite inside the box is sealed wit a resin. I would like to hear your opinions or experience, how to safely remove the resin without damaging/destroying the ferrite ?

    Thank you
    73 de Z32X

    --- Mystic BBS v1.12 A43 2019/03/03 (Windows/32)
    * Origin: BlackICE BBS (BlackICE.BBSindex.com:23) (2:240/8001)
  • From Scott Street@1:266/625 to bgonev on Wed Jun 18 18:15:24 2025

    Therefore I plan to dissassemble it completely, but the main problem is that the ferrite inside the box is sealed wit a resin. I would like to hear your opinions or experience, how to safely remove the resin without damaging/destroying the ferrite ?

    I would use heat from a heat gun to soften the resin and pick it out with fine tools. In my experience, their just isn't a really good way, fast way. Do a little area at a time with minimal heat to avoid cooking the resin and causing a bigger mess.

    Best of luck!

    --- Mystic BBS v1.12 A49 2024/05/29 (Linux/64)
    * Origin: <=-{ The Digital Post }-=> (1:266/625)