Re: [TCML] Depotting Epoxy NST

[David Speck <Dave@xxxxxxxxxxxxxxxx>]

Yep,

A long time ago, I depotted an old Analog Devices discrete component 
precision op amp module that was potted in black epoxy.  I immersed it 
in methylene chloride at room temperature for about 2 weeks.  The epoxy 
turned rubbery from the outside in, and could be crumbled off or shaved 
off about 1/8" at a time to expose fresh material inside. 

Only problem was that it also removed all the color bands from the 
resistors, the cases from the caps, and the epoxy bodies from the ICs 
inside the module.  Eventually, even the layers of the glass epoxy PCB 
separated. 

It probably would destroy the enamel on the insulation of your 
transformer windings, rendering it useless.

Dave

bunnykiller wrote:
> almost impossible to remove the epoxy without using exotic solvents 
> that will make the whites of your eyes turn some weird color....
> as my memory fails me from using not so weird exotic solvents...  i 
> think there is some type of methyl based solvent that can "soften" the 
> epoxy but Im not too sure what it will do to the insulation on the 
> wire.... someone out there knows the answer it will show up soon
>
> Scot D
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