[R-390] Filters

[ka9egw1 at britewerkz.com]

This is rather puzzling--if there are no busted wires, I mean if the
windings are still good, not open, no shorted turns, and I assume the
welds to the stack rods are good, it begs the question "well then why did
it fail?"

*Please* keep us posted on what you find.

> Well, I don't think I've destroyed it yet.  The coils still measure around
> 52 ohms on the wires.  I got one of the coils out, it just pulled out with
> the wires, the tape tab just came out when I pulled on it.  There's a much
> better  repair link here, but if you look at my pictures, it adds a bit of
> info.  I wasn't sure where the magnet was.  The filter repair link is
> http://www.delphelectronics.co.uk/filter390a/ and you can see my pictures
> here http://s251.beta.photobucket.com/user/DogTi/library/R390A
>
> I'm not sure what was wrong with this filter.  The tiny wire in the center
> of the bobbin is indeed small, I have a hard time seeing it.  All I've
> done at this point is clean things up.  There was a bit of detrius in
> between the metal coils and there is a bit more in there I need to get
> out.  I'm not messing with the center wires.  I'm not sure if the center
> wire goes through all the discs, I don't think so, I think I can see it on
> the top end it attaches to the 2nd disk from the end.  I can't see the
> center wire on the bottom end between the discs.  I'm thinking I'll have
> to use a tiny bit of silicone glue to hold the bobbins in place in the
> copper cylinder since they seem to be loose and the tape is doing nothing.
>  I see no reason to take the magnets off.  I've cleaned up all the spongy
> stuff and loose glue around the magnets.
>
> I still measure infinity with my fluke from the bobbin wires to the discs.
>  I'm hoping just cleaning it up will do something for it.  We'll see.
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