[R-390] Help getting unstuck!

[Michael Murphy]

Joe,

You need a can of slugout.

You said that just the top core is stuck in T-501. Could have been worse -
it could have been the bottom coil. First adjust T-502 and the bottom coil
per the instructions http://www.r390a.com/html/if_deck.html

I liked all of Bob's ideas that did not work of course. What about using his
light oil idea and then heating an allen wrench red hot and sticking it in
just to see what would happen.

Then follow up with the cold spray (or a fire extinguisher).

Next take your not so favorite hex tuning stick and coat the end with Zap a
Gap Cyanoacrylate. After you stick that in and let it set up, something
should move. When you are happy, saw off the end of the stick and glue on a
small knob. Now you can tune the coil casually.

Like he said, this is a broad tuned coil. Probably good enough to just leave
it.

Mike WB2UID

 ----- Original Message ----- 
From: "Joe Foley" <redmenaced at yahoo.com>
To: <r-390 at mailman.qth.net>
Sent: Friday, April 01, 2005 8:11 PM
Subject: Re: [R-390] Help getting unstuck!


> Try some freeze spray on it, but take the cover off
> first to you can watch to see that you don't turn the
> coil instead, that may pull the wires off.
>
> Try just blowing some air from the compressor in it
> first, maybe it will dislodge some of the crud.
>
> Joe
>
>
>
> --- "Craig C. Heaton" <wd8kdg at worldnet.att.net> wrote:
> > Good Morning to All,
> >
> > Just finished putting a Motorola R-390A back
> > together. Had to replace many
> > evil out-of-spec and leaky capacitors. The good news
> > is no magic smoke
> > escaped while plugging the receiver into a source of
> > electrons. Thought it
> > might be a good idea to realign the receiver, it was
> > receiving slightly
> > before my attempts at restoration.
> >
> > Now the sticky question. Can't seem to get the top
> > slug in T501 to move. All
> > of the other slugs will move. This transformer has a
> > cover with a hole
> > punched in the top center. Looks like a little rust
> > between the slug and
> > coil form. I doubt I'm to first to tackle this sort
> > of challenge. Anyone
> > been here before? What sort of fixes for a stuck
> > tuning slug? Of course, if
> > it never moves again or I break it, does anyone have
> > a spare?
> >
> > Seem to remember hearing in the Navy, "If its tight,
> > its right". This one is
> > real tight, need to make it wrong.
> >
> > Tnx,
> >     Craig
> >
> >
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