Hi All,

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

73 de Z32X

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On Wed 18-Jun-2025 9:24p, Boris Gonev@2:240/8001.0 wrote:

Hi All,

another project, but the main problem is that the ferrite inside the box
is sea
led with a resin. I would like to hear your opinions or experience, how to safe
ly remove the resin without damaging/destroying the ferrite ?

The only answer I could think to give you for your question, is to find a video on YouTube on repairing the old Commodore 64 PSU's. It is the only thing I can think of to compare it to.

What I got from a quick search is, "Using heat, tools, or solvents to seperate the resin from the componates." So a lot of accetone and a dremmel tool?

Sorry I could not be more help.

Rug Rat (Brent Hendricks)
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