[Boatanchors] SP-600 band change scraping noises?

[Rod Hogg]

Phil..

If I were doing any lubrication on the unit, would use WALSCO Lub B for
the contacts and GC "Phonolub" on the gears and rotating/rubing
mechanical
parts.  They are formulated for lubrication and longevity.

In lieu of the Walsco Lub, good pure sillicon grease, such as GC Type
Z5 Compound.  Have used both.  Not sure where WALSCO is available, tube
we use is over 20 years old, not all gone yet.

Rod K0EQH
REVCOM


Philip Atchley wrote:
> 
> Hi,
> 
> The following was posted to the Hammarlund reflector, but didn't get any
> replies.
> 
> I'm working on a couple SP-600 "RF Decks".  One seems to be quite "smooth" and
> normal when changing bands (I've finished re-capping it).  The other one prior
> to disassembly made some rather rude "scraping noises" when changing bands.  I
> examined all the "fingers" and little coil pegs after I disassembled it.  I
> didn't find anything out of the ordinary (bent/worn fingers, damaged pegs etc)
> and I wonder if a "LITTLE" lubrication of the coil pegs would do any harm
> here.  I have a variety of lubes that I could use.  Probably first choice is a
> "conductive grease" like electricians use for wiring, a high quality light
> weight "black" grease we use on VCR's, Lithium etc.  I would want to use only
> a "non hardening" grease, and just a dab with a "toothpick" on each peg.  I'm
> afraid something like DeOxit would evaporate or run off and not be very
> effective for the long term.
> 
> What do the gurus say?  It "sounds" like if I leave it like it is that the
> "Fingers" will wear out prematurely. On the other hand, if even a light grease
> would contribute to instability after the set is reassembled, I would want to
> avoid it altogether. (Though it seems like I did a similar thing to one a
> number of years ago with no problems).
> 
> What's interesting is that the "basket case" (removed from chassis when it
> arrived) full RF deck seems to be in better overall condition than the one
> that was still in the
> receiver!  Having it out sure made it easy to work on the gears etc.
> 
> 73 de Phil,  KO6BB
> 991 Different NDB's heard to date.
> SWL QSL GALLERY: http://photobucket.com/albums/y123/KO6BB/
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> 
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