One other possibility: tho dont know if they still
supply samples, and the stuff is SPENDY! An
outfit , in Portland Ore. has couple of products
geared to power companies/ electricians. It is
Cool-Amp , and has a powder that will silver plate
copper (and other) metals. They also have a
SILVER bearing grease called Conducto-Lube. and
as stated, would use VERY,VERY SPAREINGLY, but,
would lube a roller inductor's bearings,
provideing great continuity . Don't think would
be something you want to use on the inductor
surface, tho.
(this stuff made for knife switch and breaker box
repair, of high resistance problems) . Also great
for UHF/ Microwave DYA components, to silver
plate them ! Try Cool-AMP.com Even if cost
$5.00 for sample,
would be worth it! Jim NN7K


Nate Bargmann wrote:
On Wed, 31 Jan 2007 01:59:08 +0000, Ron in NY wrote:

Has anyone "fixed" this problem with their late model MFJ ???

I have an earlier "Differntial-T" model 986 that I bought in 1992. After
a couple of years it would get very stiff in certain places. I
disassembled it enough clean the grime out of the bearings and then used
petroleum jelly as "grease" sparingly applied. It still works very freely
and I haven't had to do it again.

I have to say that the finger dimple knob has not impressed me on the
later tuners when I've played with them at hamfests as they just seem
very stiff. Mine has the extra sub-spinner knob which works very well even
after all these years. Hopefully this 986 won't give up for a while yet,
but I only use it at 100 watts.

- Nate