[Hammarlund] Cleaning SP-600 coil fingers, lube question?

[Willy Makeit]

My experience has been that de-oxit leaves a slight film that will act as a 
lubricant if you give them another shot after cleaning.

What Barry H. said about the posts is quite correct.

Long time lurker, 1st post.


James R. Bond
(my real name, given long before 007)





>From: "Al Parker" <anchor@ec.rr.com>
>To: "Phil Atchley" <k06bb@elite.net>, <hammarlund@mailman.qth.net>
>Subject: Re: [Hammarlund] Cleaning SP-600 coil fingers, lube question?
>Date: Fri, 6 Jun 2003 19:54:35 -0400
>
>Hi agn Phil,
>     I guess there's some lube that's acceptable on the contacts,
>"Stabilube?" maybe a name?  But I've always just used deoxit on a wooden
>toothpick to clean the oxide off, and nothing more.  You're going at it
>properly.
>     The problem is in the oscillator module, either it's contacts or one 
>of
>the mica caps in it.  If it was the contacts, it should show up on all
>bands, unless the pins on only that module are bad.  I had a similar 
>problem
>on one in the last yr, I think it was the band 4 module, 7.4-14.8mc.  The
>freq. jump wasn't great, but it made copying SSB about impossible, which it
>normaly isn't.  I swapped in the module from another rcvr & it was OK.
>Figured I'd get back to the bad one & replace the micas in it, haven't got 
>a
>round tuit yet.  I've got a lot of dipped micas, one of these days I'll
>search out the right ones.  I hope your cleaning will do the job, but 
>here's
>a possibility for you if it doesn't.
>73,
>Al, W8UT
>New Bern, NC
>BoatAnchors appreciated here
>http://www.thecompendium.net/radio/
>http://www.hammarlund.info
>
>
>----- Original Message -----
>From: "Phil Atchley" <k06bb@elite.net>
> > Today I am continuing on the alignment of the SP-600.  I've run into 
>some
> > frequency instability on the highest band, especially at the top end.
>This
> > isn't gradual shifts but "jumps" in frequency.  I've "double checked and
> > cleaned" the tuning capacitor sliding contacts to no avail.
> >
> > I 'think' it may be due to the fingers on the coils and am cleaning them
> > with deoxit and a paper towel, hoping that will cure it.  Many of the
> > contact fingers are oxidized black and it's taking some vigorous 
>scrubbing
> > with the towel to clean them (I' not using any abrasive as I don't want 
>to
> > take off any more "silver" than is already gone).
> >
> > Question.  Is it ok to VERY lightly lube these critters?  I have a tube 
>of
> > "Ox-gard" used to enhance electrical connections, antenna assembly etc.
>Is
> > it usable for this or NOT RECOMMENDED?
> >
>
>
>
>_______________________________________________
>List Administrator: Duane Fischer W8DBF
>** For Assistance: dfischer@usol.com **
>----
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