[R-390] grease

Dan Merz djmerz at 3-cities.com
Wed Mar 16 12:24:48 EST 2005 

Hi,  what brand/type of silicone grease do you use?  I hardly ever am
tempted to use silicone grease because I recall that it is near impossible
to clean from a surface once applied but my attitude is biased by my work
experience where we used it routinely on O rings for vacuum seals because of
its very low vapor pressure.  But it had to be kept away from any surfaces
that we wanted to be clean because it could not routinely be removed by
vapor degreasing in some pretty potent degreasers.  I'm aware it has
outstanding dielectric properties and is available in many varieties
including some that are sold as lubricants.  So far I've been using
synthetic Mobil 1 gear lubricant on the gears with the hope that it wouldn't
gunk up as quickly as other types or evaporate and leave a residue.  Maybe
silicone-based lubricants are a choice I should reconsider. I'm cleaning up
an R-390 and will be re-examining my choice on what to put on the gears
soon.  I've been happy with the Mobil 1 so far,  about 4 years since I put
it on,  thanks for the info and any other info,  Dan.    

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of rbethman at comcast.net
Sent: Wednesday, March 16, 2005 6:21 AM
To: robert.boyd at sdc-dsc.gc.ca; levyfiles at att.net
Cc: R-390 at mailman.qth.net
Subject: RE: [R-390] grease

Actually, I have NOT found there to be a migration problem.  As with ANY
lubricant used on the gear train, "Just a little dab will do ya!".  The
gears AREN'T making "wild" rotations of high RPM.

Since this particular lube is wet when applied, it stays where you put it.
I use it, and find it hasn't migrated in over 5 years.  The "train" is
smooth as silk.  This same tube has lasted for MANY uses for about 12 years,
and looks like it will last at LEAST another dozen or so.

It is about a half or three quarter ounce tube.

I only apply it to the shaft to gear locations, NOT on the teeth themselves.
In that location I use a Silicone Grease.

No issues with it or the other getting into modules!

Bob - N0DGN


> Your suggestions are appreciated, but I personally would not want to use
> powdered graphite in close proximity with RF circuitry, because sooner
> or later this stuff is going to migrate and cause all number of
> conductivity problems. Comments?
> 
> 
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net
> [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Rbethman
> Sent: 2005-03-15 3:24 PM
> To: wglevy
> Cc: R390List
> Subject: Re: [R-390] grease
> 
> 
> There is also a gun lubrication product that one MIGHT consider, it is 
> "anhydrous graphite".  I would ONLY use it on the gear train, and NEVER 
> inside the R-390(*).  This being that graphite IS conductive.
> 
> Bob - N0DGN
> 
> wglevy wrote:
> 
> >I use gun grease. 
> >The stuff you put on a semi automatic pistol instead of oil.
> >You can buy it in small quantities.
> >Try a gun store. 
> >It comes in syringe type devices. 
> >
> >Trust me, if you put it on a pistol you can put it on a radio!
> >
> >Both made for the same guv'ment
> >
> >Bill N2WL
> >
> >  
> >
>                        Bob Bethman - N0DGN
> +-------------------------------+----------------------------------+
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