[R-390] Help getting unstuck!

[Cecil Acuff]

Craig I don't have any magic answers on the stuck slug but I am curious 
about the caps.  Black Beauties?  Brown Beauties?  Split, leaky or out of 
spec in some way?  Was it a Saint Julians Creek special?

Others experiences are important info in this area.

Common wisdom ranges from "Leave em alone it's not necessary" to "Change em 
all their evil"....and even "Only change em if they came from the SJC". 
(not so common a wisdom I guess)

You might try removing the can cover on the stuck slug and gently heating 
the form with a blow dryer or the slug with the tip of a soldering iron then 
trying to break it loose.  In another product with the same problem I have 
actually drilled out the center of the slug progressively....like a root 
canal and eventually reduced it to pieces to fully remove it and replaced it 
with a similar slug....I wouldn't think it would be too critical.

My couple pennies worth.

Cecil...
----- Original Message ----- 
From: "Craig C. Heaton" <wd8kdg at worldnet.att.net>
To: "R-390A" <r-390 at mailman.qth.net>
Sent: Friday, April 01, 2005 12:35 PM
Subject: [R-390] Help getting unstuck!


> 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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