[sdiy] Practical inductor question

[ASSI]

On Sunday 24 November 2013, 03:50:30, David Ingebretsen wrote:
> I thought I could just put a dob of silicone sealant in the gap where the
> wire exits the core (like these ones:
> 
> http://www.fair-rite.com/cgibin/catalog.pgm?THEONEPART=5698181221&SEARCHAG
> AI N=Y#select:onepart).
> 
> Silicone doesn't have any weird properties that will mess with the
> inductance does it? I can't see how it could, but I thought I'd ask before
> I do something that will be very hard to undo.

There are several different kinds of "silicone".  You definitely want one 
that has "neutral curing" and probably a single-component system (the most 
common of these cures by using water vapor from the surroundings).  Most 
manufacturers would list this under "potting compound" rather than 
"sealant".  Another option would be epoxy and/or polyurethane, but there's 
an even more bewildering range of systems for different applications.

The classic method in the old days was some sort of sticky wax that became 
malleable (and progressively more sticky) when you rolled it between fingers 
or a dab of resin/laquer to fix the bobin and outgoing wires.  I guess this 
would still work. :-)


Regards,
Achim.
-- 
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